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    This is the simple version of a white LED lamp that can be directly powered from mains.
    It can give ample light even for reading purpose. Capacitor Cx along with diodes D1 through D4 forms the AC step down circuit. Cx reduces high voltage AC from mains to a low voltage AC which is rectified by the bridge diode.

    Capacitor C1 removes ripples from AC so that low voltage DC is available to power the LEDs. Cx is the X rated AC capacitor that reduces AC voltage through capacitive rectance property. Resistor R1 is very important to remove the stored voltage from Cx when power is switched off. This prevents lethal shock.
    Resistor R2 limits the inrush current.

    220V LED Circuit Schematic

    220V LED Circuit Schematic

    More LEDs can be added by reducing the value of R2.Since the circuit is directly connected to mains, take utmost care to avoid shock. No components should be touched when it is connected to mains.

    attentionThe author D Mohankumar is not an active member anymore. Please take into consideration that the presented information might not be correct.
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    153 Responses to "AC Powered 220V Led Circuit"

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    1. A Metal oxide varistor SHOULD be used to protect the circuit from HV spikes..it has become mandatory and can be seen in all power supplies that works off directly from mains.

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    2. D Mohankumar D.Mohankumar says: on February 28, 2010 at 4:48 pm
        member

      Good suggestion. Adding an MOV will protect the circuit from spikes

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      • james.obillo@yahoo.com says: on August 15, 2011 at 3:14 pm

        kindly send me the list of this circuit
        value of diodes,capacitor and everything
        thanks
        God bless
        more power

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      • m.a.varghese says: on February 24, 2012 at 7:54 am

        Sir,
        I have little knowledge in electronics.
        But I am very much interested.

        Will you advise , how to make a serial LED bulb using 50 or 100 bulbs used for illumination purpose, input 220-230 volts AC

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      • kbdprasadrao@gmail.com says: on June 21, 2012 at 7:13 am

        Dear Sir,

        I do have the save query, Please provide your inputs.

        Thanks,
        K B D Prasad Rao

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      • Raghu Rao says: on December 11, 2011 at 8:45 pm

        Sir,

        I have very limited knowledge in electronics. I am looking for an inexpensive dimmable LED driver to drive 2 (two or multiples of 2 in parallel) LEDs in series. The input voltage is 120V AC. Each LED = 50mA, 48V.

        I would appreciate your kind assistance.

        Thank you in Advance.

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      • Sir what circuit i require for 25 to 50 white led’s

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      • Faizan Hamayun says: on February 10, 2012 at 1:28 pm

        HI Sir;
        I want to drive 7-10pcs of 3watt LED’s.Each LED voltage is 3.5-3.8V and current 700mA.Can it is possible to drive them with main 220Vac?

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      • Mr Mohan Kumar I wanted to know How can use 50 LED at 220V or How many DC LED can I use at 220V.Pl send me the circuit.

        and doing very good tkz.

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      • anirvan K says: on July 20, 2012 at 8:29 pm

        Hi! Mr mohan kumar,
        Please tell me how to calculate the value of R2 and also how to find out the volatage accross C1 is 25V as you have connected a 25V capacitor?

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      • Dear Sir

        I need to design the circuit for a single LED (3.2V, 80mA) and my space for the circuit is very less. Please advice.

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      • Please mention where to place the MOV & its specifications.

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      • sir ..

        Please help me with making of automatic street light circuit (in simple)…..

        i need to aprx. 15W of CFL light….

        day time auto OFF and night time auto ON

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      • Tapan Roy says: on December 6, 2013 at 12:30 pm

        MOV is used parralel connection in input of AC mains.

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    3. NISHANTH CHENNAPPA says: on May 25, 2010 at 7:30 am

      sir what do metal oxide varistor mean…

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    4. D Mohankumar D.Mohankumar says: on May 25, 2010 at 9:29 am
        member

      MOV is a device that protects circuits from inrush current and mains transients. It is connected across the Phase and Neutral after the safety fuse. If the mains voltage increases above the rated value of MOV, it conducts and short out the fuse

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    5. Sivanand says: on June 19, 2010 at 8:56 am

      Correction :A MOV is not used to protect against inrush current…NTC is used in such applications.

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      • Use of MOV’s:
        Apparently some disagreement on the exact purpose or function.
        Here the inrush current is already allowed for with an appropriate resistor.
        A fuse should probably be shown but I assume it’s perhaps not shown to keep the schematic simple.
        If the MOV conducts at a voltage peak which would not blow the fuse, it seems it would protect the fuse but in the process might itself fail.
        How is this any better than carefully selecting a fast blow fuse which can be easily accessed for replacement?

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    6. Nelson Lamahewa says: on June 20, 2010 at 5:19 pm

      Dear Mr Mohan Kumar,
      I will be thankful to you if you kindly publish a fence charger circuit diagram with transformer details.
      input should be 12 v dc
      output should be more than 5kv

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    7. D Mohankumar D.Mohankumar says: on June 20, 2010 at 5:27 pm
        member

      I will post a Fence charger circuit at the earliest

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      • sir D.Mohankumar i made microcontroller based AMF/ATS for my house use..when main goes off the amf module tries to self the geneerator and transfer the switch load to active supply…i was using 220v to 12v transformer to detect the main and generator supplies… and resistor divider circuit to more step down for my adc….sir i want to replace transformers with the capacitors and diode circuit….sir please help me with this circuit…….to design the 220v ac to 2.2 v dc convertor using capacitor and diodes …..

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      • one thing i forget to mentioned…..at the end this circuit im using PC817 optocoupler….its led takes 10mA

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    8. Need your help to understand the circuit diagram if i were to choose the same to be deployed on a 12 V DC line. I am wanting to avoid using the Invertor and hence reduce the power loss.

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    9. D Mohankumar D.Mohankumar says: on July 2, 2010 at 7:58 am
        member

      Give your requirements

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      • I wish to draw power directly of my 12V 150Ah inverter battery bypassing the inverter. I also wish to understand if i need any additional circuit to draw power from the battery. (PS: The inverter is connected the battery and is responsible for charging the battery and monitoring it.) Also suggest if i need to use a fuse while drawing power directly from the battery.

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      • Mohankumar, Request your expert advice…

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      • Aniruddh says: on June 14, 2012 at 8:08 am

        pls use a circuit comprising of comparators in order to protect the battery from deep discharge.

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      • sir (Mohan)

        PLEASE , Can u send me 12v DC 1 to 5 second Dealy circuit ,,,

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      • Tapan Roy says: on December 6, 2013 at 12:35 pm

        Kindly send me 16 w led bulb circuit operated by 230v ac and which LED will be used. give me in details.

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    10. Nelson Lamahewa says: on July 24, 2010 at 6:18 pm

      regarding about my early request of electric fence charger circuit with transformer details, as you told i did not receive it yet. please send it to me as soon as posible

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      • D Mohankumar D.Mohankumar says: on July 30, 2010 at 7:29 pm
          member

        If you give your mail ID, I will send the circuit. Posting of Electric fence circuit is difficult since in some places electric fensing is strictly under supervision of power supply agencies

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      • Dear sir
        PLEASE , Can u send me 230 acv led circuit

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      • Can you please send me a 230v. AC white/clear led circuit.
        Thanks.

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      • Hadi Hussain says: on September 28, 2013 at 6:25 am

        Dear sir, please send me the electric fence charger circuit with transformer details as discussed with Nelson Lamahewa. I require it to protect a boundary wall.
        Is this circuit is the same as pulse generator works in fencing systems.
        My email id is hadihh5(at)yahoo.com

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    11. nouman nayyer says: on August 24, 2010 at 6:59 pm

      dear sir,
      sir i want to lit 25 ultra bright leds one led need 3.6 v maximum
      sir can u plz help me

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    12. nouman nayyer says: on August 24, 2010 at 7:00 pm

      dear sir,
      sir i want to lit 25 ultra bright leds one led need 3.6 v maximum
      sir can u plz help me
      my e mail address is noumannayyer@yahoo.com

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    13. N.Subramanian says: on October 18, 2010 at 9:46 am

      Dear Mr.Mohan Kumar,
      I am very much impressed by this circuit. I want to know, if there is any formula for for R2 to add more number of LEDs to the circuit. I want to add in multiples of 4 to the circuit. Can your circuit be used for PIC Microcontrollers circuit by adding 7805 and filters? Please suggest modifications. (BTW I am hobbyist and novice)
      Thank you

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      • D Mohankumar D.Mohankumar says: on October 18, 2010 at 4:41 pm
          member

        Dear Mr.Subramanian

        The voltage and current in the circuit depends on the AC capacitor used.Each ordinary White LED requires 3.6 volts and 40 mA current to give sufficient brightness.By increasing the value of CX to 0.1 uF, the voltage can be increased to 50 volts and current around 100mA.Add LEDs based on this. You may see the High power LED lamp circuit posted.R2 reduces the inrush current. LED resistor should not exceed 470 Ohms if the current is around 50 mA.

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    14. N.Subramanian says: on November 8, 2010 at 10:34 am

      Dear Mr.Mohan Kumar,
      Instead of using bulk transformer, this circuit is very cute. I have a small 4 uf capacitor. What is the maximum current that can be derived out of it? and what are the modifications to connect maximum number of LEDs?

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      • D Mohankumar D.Mohankumar says: on November 8, 2010 at 3:58 pm
          member

        Is it AC capacitor rated 400/600 volts AC?. As a rule each 1 UF can give 100 mA current. This is only theoretical. Current may change depending on the AC input,Rectance of the capacitor etc.If your capacitor is x rated AC type, definitely it can give more than 300 mA current. Maximum voltage from the capacitor will be around 50-70 volts depending on the AC input. Each White LED requires minimum 3 volts and maximum 3.6 volts. So 60 volts / 3 = 20 if all are serially arranged.Use 1k 1 watt resistor as R2

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    15. N.Subramanian says: on November 12, 2010 at 11:59 am

      Dear Mr.Mohan Kumar,
      It is 4 uf 400/600 volts rated, used for AC fan motor.
      If it gives 300 mA can it be used for every circuit that requires around this rating, including relays? Can I use this for other circuits with Microcontrollers adding 7805 to produce 5v.
      Thank you,

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    16. N.Subramanian says: on November 22, 2010 at 10:40 am

      Dear Mr.Mohan Kumar,
      I connected the circuit very carefully without soldering. I used 4uf capacitor(CX) 400/600 volts rating, 1m 1W (R1), D1-D4 IN4007, 1k 2watt (I have 2w only not 1W) (R2) and 100uf 63v (not 25V) (C1). I connected to the main for checking, without connecting any LED. The voltage across was 67 to 70 volts. Very soon I got burning smell and I disconnected the main. All the components except CX capacior and R1, are very hot. D1-D4 are hot. But R2 was very very hot likewise C1 also. I think R2 and C1 would start buring if I continued for sometime. The output is around 70v. Should I use C1 with more voltage rating? Then what about R2? Why it is also very hot? OR If I connect the load – LEDs – then will it be OK? Please help.
      Thank you

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    17. D Mohankumar D.Mohankumar says: on November 23, 2010 at 4:10 am
        member

      Dear Subramanian

      Your problem is with the AC capacitors.It is giving high current.As a rule each 1uF will pass 100 mA current. So 100×4 = 400 mA. With out the load, there is no current drain.So components may heat up.Connect 1K 1 watt resistor as load in the place of LED and check whether it is heating. Check only after disconnecting the power.You can use an ordinary Red LED as load with 1K series resistor.All the resistor values must be above 1 watt.Use 1K resistor as R2.Keep the circuit ON for 10 minutes.If everything is ok connect White LED.

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    18. dear sir,
      i am using x-rated 0.33 cap and at output i have two smd led of different colour @20mA .so what value of current limiting resistor i use, which is good for led also mention wattage rating.plz reply soon…….sir.

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      • D Mohankumar D.Mohankumar says: on November 24, 2010 at 1:58 pm
          member

        0.33uF cap passes around 25 mA current and 18 volts depending on the AC input voltage.You can select the resistor using the formula V/I.That is if the cap passes 18 volts then 18 / 0.02A = 900 ohms.You can use 1K resistor .Use 1/2 watt resistor.It is better to try with an ordinary red LED first.If there is no problem, connect the SMD LED each with 1K series resistor.

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    19. sir,
      can i replace each component (like 1M ;1/4W bleeder resistor,1n4007 diode for bridge rectifier,current limiting resistor except x-rated .22/.33;400V cap) with SMD component.i use smd led @20mA of different colour,so what value of cap i use.

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    20. N.Subramanian says: on November 29, 2010 at 12:22 pm

      Dear Mohan Kumar,
      I have connected a red LED in series with 1k 2watt and switched on the mains. The red LED glowed brightly. Within 2-3 minutes I smelt the burning smell and I switched off the mains. R2 and C1 are very, very hot and D1-D2-D3-D4 and also the series 1K 2Watts resistor are also hot. Why it is happening and what should I do next?

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      • D Mohankumar D.Mohankumar says: on November 29, 2010 at 1:14 pm
          member

        Dear N.Subramanian

        Something is wrong in the circuit. Either a short circuit or the Capacitor is shorted.Replace the cap and confirm that it is 400 V AC.Check all the connections once again. Usually, the Cap will not heat up and this is the advantage over resistor type power supply.So many similar circuits are posted in the site.Search for the same.
        Thanks

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    21. can i use 474k 400v capasitor for this purpose?

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    22. Dear Mohan Kumar;

      May I know the value of R2 & CX for 60 white LED’s

      Thanks

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      • D Mohankumar D.Mohankumar says: on December 16, 2010 at 4:44 pm
          member

        Dear DS Upananda

        Each White LED requires 3 volts.You can connect the 3 LEDs in one set with 100 Ohms resistor.As a rule for each 1uF ,the capacitor gives 80-100 mA current depending on the input AC voltage.So for CX use 1uF 400 V cap. R2 can be 470 Ohms 1 Watt.LED strings should be 3-4 in one set. So if you have 60 LEDs, then 60/4 = 15 strings with 15 series resistors. I uF cap can give around 25-40 volts.

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      • sparta85 sparta85 says: on June 15, 2013 at 4:00 pm
          member

        dear Mr Mohan Kumar

        I have circuited led lamp with 60 leds, I made it in 3 string. each string has 20 leds , I use A 105j . as you said, if I make the circuit to 3 string it will deliver for about 23ma each string,

        Sir., How much watt (power) my circuit is? and how do I calculate for some circuit if I make with different number of leds?

        as you know,,I’m Realy beginer to electronics

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    23. vineesh.m says: on January 30, 2011 at 8:26 pm

      dear mohan kumar,
      how we can make a led lamp of white led’s . please give the circuit diagram & parts list

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    24. vineesh.m says: on January 30, 2011 at 8:31 pm

      how we can male a led lamp of 60 nos of white led’s please give th circuit diagram& partlist

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      • p.s.shanmugasundaram says: on February 1, 2012 at 7:03 pm

        how we can male a led lamp of 60 nos of white led’s please give th circuit diagram& partlist

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    25. Kaushik Mondal says: on February 11, 2011 at 12:56 pm

      If I want to use only one piece ordinary 5mm white led, what will the value of R1 &R2 and Cx?

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    26. Dear Mr.Mohan Kumar,
      I am very impressed by your practical electronics knowledge,
      i tried this circuit, but with some amendment, i did’nt used C1 & CX, circuit is working fine, only problem is that R1 & R2 got heatup. is there any solution for this problem?
      please reply on my email. thanks. …….saleem

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    27. please google on this circuit and u ll get the purpose of each component each one is important dont try to tamper as it may cause shock or explosion.
      Cx is current limiting not r1
      R1 is discharging C1

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    28. shafi says: on May 9, 2011 at 9:17 am

      Dear Mr Mohan Kumar,
      i want to glow the 100 numbers of white led for reading purpose,so pls give tha details about circuits and MOV ratings and approx cost

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    29. Kaushik Mondal says: on May 23, 2011 at 1:19 pm

      Dr. Mr. Mohan Kumar,
      When I switch on the circuit the lights up for a milli second then it turn off and remain off and when I switch off the circuit the leds again lights up for a milli second and then turn off. Please solve the problem.

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    30. Greetings sir,
      sir i want to know,
      1) how to calculate the value of R1?
      2) if i shall remove R2, would circuit work or not and how to calculate the value of R2?
      3) If circuit is braked at D1,D3 output and D2,D4 output then what will be the voltage at these points?

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    31. Marcia da Joana Josimar says: on August 16, 2011 at 11:53 pm

      prwsiso de um esquema de ledes para iluminar um painel publicitario

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    32. R KANNAN says: on August 22, 2011 at 7:13 pm

      Hi Mohan
      I was just checking for a LED indicator to fix it on the main switch board and I got this circuit. As I was novice in electronics, could you please inform the power consumption by this LED light if it kept ON 24 hrs, 365 days. Also please have a look on the circuit in this page: http://www.turbokeu.com/myprojects/acled.htm. will you please explain, how yours is better than this OR which is very simpler for a novice.
      Best Regards
      R Kannan

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    33. how to connect LED’S to 220v Ac supply ..how many LED require…and circuit design

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    34. jinto joseph says: on October 8, 2011 at 4:53 am

      sir,
      How to connect 1 watt LED to mains 230v.Pls provide the circuit

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    35. liyantana says: on October 9, 2011 at 3:06 am

      Dear Mohan Kumar: May I know the value of R2 & CX for 46 white LED’s 2 strings. Thanks before

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    36. ali chemmad says: on October 12, 2011 at 8:54 pm

      dear mohan kumar sir thankyou very much for this post

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    37. Sir,
      Thanks for this good LED circuit.
      I note that in the diagram posted the main capacitor is not properly labelled.
      You show it as CX = 472K, 400V.
      I think you mean: CX = 470nF, min rated 400VDC or 275VAC rated.
      Also I wonder if there is a way to reduce the power loss across the 470Ohm resistor?
      Could a 400V MOV be used here instead of.
      BTW your electric fence circuit has not been posted as yet.
      If time permits could you send to:
      peter_rob.remove this.@bigpond.com
      Thanks

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    38. Tharangini says: on November 9, 2011 at 9:02 am

      dear sir
      i want to build a led serial light. i want around 25 led’s to be connected in series. and am using 220v ac mains. what should be the resistor value that i must connect at the positive end?

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    39. Ram Kumar says: on November 19, 2011 at 5:29 am

      I am looking to possibility of supplying from a 220V 5 KVA to a LED powered street light, what are the protection precaution I should look into. Moreover, if the voltage level falls to around 170V does the LED operate. Also, what are the addition specification I need to add before procuring LED to ensure it operates on low voltage of around 170V too. Looking forward for suggestions. Thank you!

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    40. K.S.Prabhakaran says: on November 20, 2011 at 4:04 pm

      Dear sir,
      I want to build a ciruit for output of 3.3v 2.5amps without transformer.(or) pls send me to the 230v Hi power LED (7watt) circuit to my mail ID.
      Thankyou

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    41. Hi, i have used the same circuit and the parts but my capacitor started bleeding and the leds are no more glowing. Please help me with this.

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    42. d pradeep says: on January 2, 2012 at 10:27 am

      mr.d mohankumar sir.
      i want circuit for 100,150 and 200 LED for 220-250v 50hz main supply.
      can u plz sent me circuit details& its components.to my mail
      dp4pradeep@yahoo.in

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    43. hello sir..

      plz tell us how to calculate values of x rated ac capacitors….

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    44. Hi D.Mohankumar,
      I was very interested in this circuit, and Wanted to make 25 LED(2.8V, 20mA) at 220V, 50Hz table lamp, but with no success…
      Maybe you could provide some help with the circuit?
      Thanks

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    45. Can I use 75 White LED in series after rectifing?

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    46. Thks I saw the circuit it hv ac LED Too.
      Acutaly I wanted to know How can use 75 (DC) LED in series at 220V or How many DC LED can I use at 220V.Pl send me the circuit.

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    47. Dear Mr.D.Mohankumar
      Thks
      I wrote U again.
      Ur Circuit is Ok.
      I had two circuits I mix up them.
      Regards
      Javied

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    48. Respected sir,
      please guide me for mini project based on communication using photodector ic LMC6084 and ADC ADC034.please reply as soon as possible.

      Thanking You.

      Best regard
      Laxman

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    49. Mr.Sivanan
      What is NTC

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    50. dear
      mohan kumar sir,

      above u shown circuit is for glow up 4 leds how can we increase the
      values of r1,r2,cx(cx is the ceramic capacitor iam right r wrong)and c1
      for multiple of leds to be added pls tell me and for all how to
      calculate all this things to improve knowledge in electronics
      circuits.give with some example for this thing. iam waiting for ur reply.
      thanking you sir

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    51. Sir, Pls send me cx value for driving 4 1w led’s

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    52. Dear sir,
      I need one circuit of 220v input I want to drive 1 watt three and five led. kindly send the circuit diagram to mail please. I dont have electronic knowledge so please send exactly the component. Thanks in advance.

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    53. sir r u there pl s reply so many of them waiting for u r use ful projects

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    54. Dear sir,
      what is the power consumption of this circuit in watts if 30 white LED’s are used. thanks in advance.

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      • Mohinder Pal says: on May 1, 2012 at 11:17 am

        Simply multyply the wattage mentioned on the LED with the number of LED

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    55. If anyone wants to make a lamp with 30 Led’s then you can visit this link http://www.instructables.com/community/LED-TubelightLamp-operating-with-220-volts-AC/

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    56. Capacitor cx should be rated 400v?250v ok?

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      • Mohinder Pal says: on May 1, 2012 at 11:12 am

        You have always have to be on safer side You can use 240 V capasitor also but it might get heated up in use and a more voltage cappacitor can store more current as AC voltage is never stable a less voltage capasitor will simply blow off

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    57. Amer Rehman says: on March 31, 2012 at 9:30 pm
        member

      Is it necessary to use bridge rectifire? LED are themselves diodes. I’ve seen a commercial night lamp in which diodes have not been used.

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    58. shasank says: on April 1, 2012 at 2:56 pm

      dear sir,
      i think is it necessary to use dc output for 9 v laser alarm circuit instead of led? if it is not necessary pls send circuit ofinput230v and varying 0 to 20v dc output,without transformer.i am waiting for your reply.
      thankyousir

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    59. Mohinder Pal says: on May 1, 2012 at 11:07 am

      I have working with electricals & electronics for about 35 Years and as shown in the figure you have made a bridge rectifire the name LED is derived fromlight emitting diode so why do you need a bridgerectifire for a conversin I have tried to make a LED light about ten years ago from now and was quite success full. I just multiplied the voltage of the LED to make it half the ammount of AC availableas when AC conevrted to DC it remains only half and connectet them in series being careful that they have opposit polarities connected and simly connected them to mains and it worked.

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    60. las says: on May 8, 2012 at 1:22 pm
        member

      can 3.6v led run with 6v and less amps?I got china led 230v and it says it uses chip 5630 16 leds.when i checked voltages it was 6v .0656A per chip but in data sheets its 3.6v 150mA max?? serch ebay for 230v 5630 you can find the bulb.Will it get burnt?shall i return it?

      thanks in advance

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    61. kaisar says: on May 30, 2012 at 8:46 pm

      Sir, can I use this ckt to charge 12v 45 hm battery?

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    62. rir,can you please send me cricuit dig,procedure and appratus for making led lamp having 20-25 led bulbs connected
      to main power supply

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    63. Vineet Khanduri says: on June 27, 2012 at 5:45 pm

      Hi,

      I have a fish tank and wanted to build something on my own! There are ample of LED fixtures available but I want to light that Aquarium using the LED light built by me .. Can you please help with the 50 or any equivalent circuit and components please? Will prefer white LEDS!

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    64. We can use 1watt led x 4pc in this circuit ?
      please tell me

      Thanks

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    65. Seetharaman says: on June 29, 2012 at 7:22 pm

      With the above circuit <5mA current will flow through LEDs, hence can be a night light. For rated brightness Cx should be 274K 400volts.

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    66. Seetharaman says: on June 29, 2012 at 7:26 pm

      Hi Babu 1 watt LEDs require 350mA. for 4 pcs 1 watt LEDs use suitable driver module and connect all the 4 LEDs in series. (13.2 volts DC @ 350mA)

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      • Hi Seetharaman 1 watt led connecting only series connection ? why not parallel connection. If I’m trying to parallel connection any probzs in this circuit.
        One think I would like connect to 1 watt 10 leds for this circuit ,Then which is the AC capacitor value ,and 100uf 25v is enough for this circuit?
        Thanks My Dear friend

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    67. what alteration should be done in this circuit to add 60 leds.
      whether i should remove R2 or i should change the value of c1 /c2

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    68. how many leds can give same light as 40watt
      tube

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    69. Michael C says: on July 6, 2012 at 11:58 pm

      I have been investigating home-brewed LED solutions whose power source is ultimately 120V house line. The “typical” approach is to use a driver circuit to generate constant-current DC. I understand that LED’s life-expectancy requires that the power-source be constant-current DC. So, does a circuit like this severely reduce the life-expectancy of the LEDs? If not, it is certainly an attractive alternative to the very expensive off-the-shelf options, and understandably so, for its simplicity. One would guess that line-supply off-the-shelf options would exist; perhaps it’s hard to UL-list such?

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    70. Hi,

      I am planning to built an Electric lanthern using 100 white LED bulbs which can be used as an emergancy lamp in my house using rechargeable battery through AC Power.

      Can anybody guide me how can we prepare itand the material required.

      thanks in advance

      Regards,
      Soma.

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    71. dear sir i have 20 LED PLEASE SEND ME COMPLETE CIRCUIT WITH 220 VOLT AC SUPPLY

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    72. Greetings Sir!
      I’m a student planning to have a project in LED Lights. I’m planning to have one circuit of 220v input driving 10 watt led. kindly send the circuit diagram to mail please. my background in electronics knowledge isn’t that much, I’m asking for your help, please send exactly the component. Thanks in advance.

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    73. 1.How to calculate the value of resistor required to control inrush current

      2.What changes to made to operate a single ordinary 20mA White LED ?

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    74. can i use this power supply ckt to drive my microcontroller ckt if i connect 5.1v zener diode in place of led’s i will have 5vdc o/p to drive my 89c2051 along with 6 leds and 6 optocouplers….. I require 60 mA of current at th emax can u suggest me the solution

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    75. Jim Keith Jim Keith says: on August 13, 2012 at 7:40 pm
        member

      Check out this version of the capacitor power supply:
      http://electroschematics.com/5678/capacitor-power-supply/

      Be sure to be careful as there is serious shock hazard as it is tied to the line–make sure that neutral line measures low voltage to ground (earth)–that will minimize shock hazard–but if it is ever plugged into a miswired power source, beware…

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    76. Pls tell me the resistance for 220v AC for 1 LED

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    77. What resistance should be connected to 3V LED if i want to connect it to 220V mains..??

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      • Jim Keith Jim Keith says: on August 30, 2012 at 8:23 pm
          member

        Since the source voltage is much greater than the load voltage, it makes little difference if one LED is used vs four in series. So, no additional resistor is required in series with the LED.

        This is essentially a constant current circuit with Cx being the limiting device.

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      • Prashant nayak says: on February 10, 2014 at 12:35 pm

        200k resistance in 1 led

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    78. joemelr says: on September 24, 2012 at 11:09 am
        member

      Mr.Khumar,
      Kindly send me also the materials list for this circuit.
      dont forget to give the values of the resistors, capacitors, diodes etc.
      thanks again…

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    79. gamika says: on October 1, 2012 at 7:55 pm
        member

      Dear my friend,
      Very much appreciate if you could send me the list of items that you have used to create this circuit.
      Such as value of diodes, capacitors and resistors.
      Thank you very much
      Gamika Sandamal

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    80. What should I do if I want to connect around 30 LEDs instead of 10? Please help?

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    81. Thomas Mize says: on October 11, 2012 at 7:48 am

      Sir, the only thing I am confused about is the AC Capacitor you are speaking of. What is that? What is the value?

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    82. Sir,
      I have little knowledge in electronics.
      But I am very much interested.

      Will you advise , how to make a LED bulb using 50 bulbs(each led 3.5 to 3.8w power), input 220-230 volts AC.

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    83. Sir,
      I have little knowledge in electronics.
      But I am very much interested.

      Will you advise , how to make a LED bulb using 50 leds(normal white led), input 220-230 volts AC.Kindly send me the circuit diagram.

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    84. How we calculate the value of “R1 & CX”.,also when we use more led then how calculate vale of “R2″.

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    85. sujit bhattacharya says: on November 4, 2012 at 1:48 pm

      sir ,i am used 100 L E D six color series connection direct main 230 V supply,PL HELP ME. FULL ELECTRONIC DRAWING ,I AM HANDICAP PERSON,URGENT MAIL ANSWER

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    86. Srinivas D says: on November 12, 2012 at 3:38 pm

      Hi, Thanks for good circuit, I would like to use 3*1W LEDs so I need approx 900ma at output. Can you please suggest necessary changes in values?.

      Srinivas D

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    87. Do you have a circuit diagram for a 230V AC powered low cost 12W LED house light bulb(with 3V, 20mA LED’s) with high brightness ?

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    88. Keerthy says: on December 7, 2012 at 1:29 pm
        member

      Dear sir,how do i to connect 100 LED’S bulb 360 degrees use for my house with 220v Ac supply Please can i have circuit diagram?

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    89. sir can I replace C1 with 2.2uF 350V ?

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    90. and can I use 470uF 100V instead of C1?
      If I use what will be the difference?

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    91. Sir,
      can you kindly advice me how to connect the MOV in the above circuit ?
      Thanks a ton in advance.

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    92. and the value of MOV required..

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    93. CiprianM says: on August 7, 2013 at 8:01 pm

      Dear Sir
      I am trying to make a led bulb with 50 leds to be used at 220v with three different intensity levels.
      How can i do that?

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    94. jatin prajapati says: on August 9, 2013 at 7:21 am

      i have 12v/1w led. make series to 240v 20led series

      from circuit diagramme

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    95. we can glow a led using a diode,resistor and led in series with a supply of 220v ac.why bridge circuits so complicated…………..?

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    96. HELLO,
      SIR I WANT TO MAKE 33 POWER LEDS OF 3 WATT EACH IN A PARALLEL OR SERIES CONNECTION HOW I CAN MAKE THE CIRCUIT
      AND WHAT CONTROLLER SHOULD USE.
      PLEASE TELL ME.

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    97. hello,
      can we increase the number of LEDs to 6o? if the answer is no, what changes do we have to make? thank u

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    98. K B D Prasadrao says: on September 26, 2013 at 7:11 am

      sir this a really good circuit more useful

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    99. Sir just a small question
      can i use 73 white l.e.d in series , so as to complete 73*3=219 volts , which is delivered by AC
      PLz Plz plz Reply sir
      thnxxxxxxxxxxx a lot if replied……

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    100. Dr K M Babu says: on October 4, 2013 at 5:28 pm

      Dear Sir,
      Your circuit is fantastic.But I have a doubt. Shall we use 1 amp 4007? I have changed R2 upto 100 ohms. But the output voltage remains at 40-45 volts. What shall I do? Please reply
      Dr Babu

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    101. Digil David says: on October 15, 2013 at 12:56 pm

      Sir I connect 225k capacitor series with my multimeter and check the output voltage, but I saw something against my expectation. That is the voltage varies from max 230 to 0. In my expectation it must be nearly 25v. But when I put 1M resistor parallel with capacitor the output willbe nearlly 118 volt. I get the same range for some other values of capacitor. Is it correct, pls rply.

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    102. sir, how much voltage to illuminate the 4 series LED.. i test this diagram but the LED didn’t work.. the voltage i get from the led was 4 volts. i also put fuse does it affects the circuit thats why its not working?

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    103. P.A.Somasiri says: on October 27, 2013 at 9:39 am

      Dear Sir,
      I am srilankan and I want to build a 220V ac operated door bell circuit without a transformer. I would like a short music of UM 66 tune. I think you can build it correctly and safety way. Dear sir please tell me kindly how can I build it. Lot of thanks for you.
      Yours truly,
      somasiri

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    104. I made a 1kW 220v “direct drive” led lamp from 10 pcs 100w 10×10 led-arrays in series plus a rectifier (four diodes) and a capacitor. The leds seem to divide the 320v DC evenly. Near 100000 lumens….

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    105. Pramod.mp says: on November 14, 2013 at 6:32 am

      To drive a single 1w led using 400v1uf how we can select r1 value

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    106. h.i.singh says: on November 23, 2013 at 11:38 am
        member

      Dear Sir,
      I didn’t understand one thing. As fer I know C1
      474K can supply 12v 25 mA
      105K can supply 24V 40 mA
      225k can supply 24v 100mA
      I got that from http://www.electroschematics.com/5678/capacitor-power-supply/)So how could it possible lightning 20 led in series that have 20×3.2=64v needed??
      On the other hand I got another same circuit in this site (http://www.electroschematics.com/3752/transformer-less-power-supply/) is 12v 100mA.
      Please sir explain it to me.

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    107. Sir, I am in need for a circuit of 1.5A, 230V ac to 3.5A, 18.5V dc rectifier. Please kindly provide it to me to my mail.

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    108. aeframferrao says: on December 1, 2013 at 4:45 pm
        member

      Dear,could u plz send me circuit diagram of white or any other color LED light in series[ 60 to 100 lights] using 220 V A/C, hence I am machenical Engr I dont much knowledge in electronic.Kindly help me.

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    109. Sir,
      I want to drive 400 Blue + White leds (10 mm Size)on 230 Volt AC
      please let mi know what will be circuit with component values and how to make led strings. 40 led in each alphabet and total 10 alphabets

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    110. Dear Mr. Mohan

      Kindly send me the simple circuit diagram for 3.2 volt, 250ma high power LED 7 in series.

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    111. ir,
      I have little knowledge in electronics.
      But I am very much interested.Will you advise , how to make a serial LED bulb using 60 bulbs used for illumination purpose, input 220-230 volts AC

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    112. Dear Mohan

      I request you about high power led’s … is this circuit is working fine with these LED’s??????

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    113. Prashant nayak says: on February 10, 2014 at 12:32 pm

      i have not good knoweledge in electronic
      sir please help me
      i have made i aquarium in my house i want to decorate with 60 or 70 LED with AC power how to connect with AC power please help me…

      thanks..sir

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    114. yogendra says: on March 13, 2014 at 8:13 pm

      sir, plz help me,
      I need to design the circuit for a 3 smd led light(3.6-3.7v) to connect ddirectly to 220 ac power..and my space for the circuit is very less. Please advice me.

      and i ask to you which conductor used in red indicator on power broad.thank you

      plz send me immediate ans. becoz i need for my project.thank you…

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    115. Narendragoud says: on March 20, 2014 at 8:58 pm

      whats the c1 capacitor value and is it possible to practically.may connect 20 leds

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