Here are some of 6v to 12v 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.
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.
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
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
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.
Last members who liked this article
KROKKENOS
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 ??
u get only 1/2 ampere when drawing current from the ends leaving center tap unconnected…the secondaries are not in three phase
Thanks a lot for your reply .
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.
I agree, you can’t regulate an output
of 3 Amps with just a zener, you need an extra output power transistor, let’s say 2N3055,with the zener connected to the base.
Really? I have used 100 watt zeners on lift trucks They were about 20 millimeters i
diameter
It is useful to me
can ‘ampere’ reduces or increase HOW?
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
hi, how can the first aaroncake method be made to handle currencies in the range of 2 to 5 amps? -thanks!
in 555 IC based boost converter what will be the inductor wire size and also mention the number of turns for 2.2mH
sir,
I have two 0-6v transformer. by using that how to get 12v Ac output.
how to connect that transformers to get 12V?
SIR,
I NEED A DC SUPPLY TO CONVERT 6V DC TO 12VDC HOW CAN I PRODUCE IT
Sir,
I want to use a converter on 6v 3.2Ahr lead acid battery. Which is the best suitable and Low cost circuit.
Hi there just wanted to give уоu a quicκ hеads up аnd let you know а few of the
рicturеs aren’t loading correctly. I’m nοt sure why
but I think its a lіnκing issue.
I’ve tried it in two different web browsers and both show the same outcome.
please can i use the ne555 circuit to invert 12vdc to 24vdc, what should i replace? thank you
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.
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??
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.