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    Here are some of 6V to 12V DC converter circuits that can be used to convert a small voltage of about 6 volts to a higher voltage of 12 volts but ofcourse with a lower current rating.

    6 volts to 12 volts converters

    This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages.

    Source: http://www.aaroncake.net/circuits/6-12conv.asp

    6v 12v converter

    Parts List:
    R1, R4 - 2.2K 1/4W Resistor
    R2, R3 - 4.7K 1/4W Resistor
    R5 - 1K 1/4W Resistor
    R6 - 1.5K 1/4W Resistor
    R7 - 33K 1/4W Resistor
    R8 - 10K 1/4W Resistor
    C1,C2 - 0.1uF Ceramic Disc Capacitor
    C3 - 470uF 25V Electrolytic Capcitor
    D1 - 1N914 Diode
    D2 - 1N4004 Diode
    D3 - 12V 400mW Zener Diode
    Q1, Q2, Q4 - BC547 NPN Transistor
    Q3 - BD679 NPN Transistor
    L1 - See Notes on the website
    MISC - Heatsink For Q3, Binding Posts (For Input/Output), Wire, Board

    This 6V to 12V converter circuit is made with an IC from SGS with several additional components. The IC is a TDA2003 but it can be replaced with a TDA2002.
    The cost of building the 6volts to 12 volts converter should be low enough to justify constructing it instead of modifying the entire equipment setup to work directly with a 6 volts power supply. The two principles of simplicity and functions properly without the need of the transformer.

    6 to 12 volts converter

    This is a Simple Switcher step-up voltage regulator made by National Semiconductor, (part number LM2577-ADJ). Together with a few extra components, a heat sink and some wiring, it is possible to generate over 1A from the battery of an Austin. The output connector is taken from a car charger extension lead, so that a phone or a sat-nav just plugs straight in.
    Source: http://www.austin7.org/6v_to_12v_converter.htm

    6 12 converter

    This 6V to 12V dc-dc boost converter can drive a load in 12V about 3A current.The 555 timer IC is operated in astable mode, generates about 29Khz frequency of about 54% duty cycle drives the input of TIP41C transistor.1000uF capacitor smoothens the output voltage of the dc-dc converter.LED and 1.5Kohm resistor serves as indicator and load for output stability when no load is connected.You can add a 12V zener diode (1N5242B)across output to ground for further output stability.

    Source: http://www.electronician.blogspot.com/2009/09/555-timer-project-6-12v-dc-dc-boost.html

    555 voltage converter

    Do you know some other designs of 6v to 12v converters? Then please write a comment and post the links in it. We will read it and add it to this list.

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    22 Responses to "6V to 12V DC Converter Circuits"

    1. Hello Sir ,
      How are you ? Sir , I have a Transformer of 6V 1A . In Secondary side of Transformer have three phase . I mean 6V – 0 – 6V . If I make Diode bridge with the two end 6V and 6V ( Without middle 0V ) , then the Output of Bridge gives 12 V DC . But I don’t know – in this condition – will I get 1A Current with this 12V DC ? I am in totally confusion . Can I get 12V 1A Current in this way from 6V 1A three phase(In secondary) transformer ??

    2. Sivanand says: on July 22, 2010 at 8:08 am

      u get only 1/2 ampere when drawing current from the ends leaving center tap unconnected…the secondaries are not in three phase

    3. C.Mitra Chinmoy Mitra says: on July 22, 2010 at 9:56 am

      Dear Sir, there is a mistake in the writeup of the last circuit using a NE555 ic as the oscillator. The last sentence which reads “You can add a 12V zener diode (1N5242B)across output to ground for further output stability” is grossly wrong, since connecting a zener diode right across the output will cause it to instantly blow. A current limiting resistor is required in series with the zener. Moreover, it is not possible to regulate a power supply capable of giving 3Amps of load current simply with a zener diode. Theoretically, the zener diode current should be about 5-10 times the current to be regulated.

    4. krishna jadhav says: on July 22, 2010 at 9:51 pm

      It is useful to me

    5. krishna jadhav says: on July 22, 2010 at 9:55 pm

      can ‘ampere’ reduces or increase HOW?

    6. dear sir,
      due 2 the non availability f 1N5401 i conectd 1N5408 & o/p givs 30v.
      is it the pblm with diode r any ther else?
      plz help me sir

    7. hi, how can the first aaroncake method be made to handle currencies in the range of 2 to 5 amps? -thanks!

    8. in 555 IC based boost converter what will be the inductor wire size and also mention the number of turns for 2.2mH

    9. jagadeesh says: on May 21, 2012 at 6:08 pm

      sir,

      I have two 0-6v transformer. by using that how to get 12v Ac output.
      how to connect that transformers to get 12V?

    10. JIJIN CP says: on May 31, 2012 at 11:22 am

      SIR,
      I NEED A DC SUPPLY TO CONVERT 6V DC TO 12VDC HOW CAN I PRODUCE IT

    11. Nitikesh says: on June 19, 2012 at 6:31 am

      Sir,
      I want to use a converter on 6v 3.2Ahr lead acid battery. Which is the best suitable and Low cost circuit.

    12. please can i use the ne555 circuit to invert 12vdc to 24vdc, what should i replace? thank you

    13. Jim Keith Jim Keith says: on December 8, 2012 at 3:22 pm

      This has already been done.
      Check out the 3rd circuit on this page:
      electroschematics.com/6788/3v-to-9v-dc-converter/
      With some modifications, it will work at 12V input and can easily generate 24VDC. One thing lacking is voltage feedback that is necessary for high power applications.

    14. can the 3rd circuit in “electroschematics.com/6788/3v-to-9v-dc-converter/” after replacing the zener to 24v and the source to 12 volts can it delever 24v, 1 amp output??
      can i use tip3055 insted of 2N3904 ?
      also what about coil??

    15. The circuit using the two amplifiers look interesting but I am toying around with a 50 Hz SINE wave inverter so that I can drive my Revox recorder on car battery. They have induction motors and those beasties do not like square waves. They are not particular at the frequency so that anything 40 to 80 Hertz is fine. I tried square waves but they made a nasty hum especially the capstan motor.

    16. can anyone help me making a 3 ampere 12v to 15v DC Converter

    17. sir can you give the full pdf report or ppt for this project i need connections diagram sir

    18. SAURABH SONI says: on February 7, 2014 at 4:35 am

      Sir if i can use a 6v to 12v converter but what effect in mA.

    19. rahim k vayath says: on March 26, 2014 at 7:40 am

      what changes should I do, in the circuit 6to12volt…. to make a 9v to 12v convertor

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