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# 6v inverter circuit

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Location: Kerala, India
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 11-23-2012, 07:44 PM
Hi all,
Somebody please help me to find a 6v to 220v inverter circuit. All i need to light a 11w CFL from a 6v 4.5Ah battery.
-Vinod chandran

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 11-23-2012, 08:31 PM
hi vinod
did you try putting "6v to 220v inverter circuit" into google
there are dozens of hits many with circuit diagrams

Dave

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When all else fails.... Read the instructions!

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 11-25-2012, 02:47 PM
Hi davenn,
Thank you. I just found a simple circuit but it is in 12v supply. I am attaching the image. Please look. I just tested it and it is working well with 12v battery. So What changes do i need to connect this circuit with 6v battery?. I know i need to change the transformer into 6-0-6 .Battery Ah is 4.5. Please help me.
Attached Thumbnails

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 11-25-2012, 03:58 PM
You will need to change the transformer as you say.

6V will be insufficient to turn the fets fully on so the chip should be fed from two diodes connected to the fet drains. There will almost certainly be enough voltage to get it started.
Put an electrolytic on the 4047 supply - you should have this on the 12V circuit also.

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 11-26-2012, 12:15 PM
Hi duke37,
Thanks a lot. But i can't understand your idea. So please draw a diagram of your idea.

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 11-26-2012, 03:15 PM
You should have an electrolytic capacitor on the 6V input since the inductive current will go in both directions under light load.

The 4047 should have a smooth supply.
Attached Thumbnails

Senior Member
Join Date: Jun 2011
Location: Kerala, India
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 11-26-2012, 07:45 PM
Hi duke37,
Thank you. Due to the language problem i am attaching an image of what i understood from your image. Please correct if any errors found.
Attached Thumbnails

Senior Member
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 11-26-2012, 09:28 PM
You need a capacitor (10uF?) across the 4047 to give a smooth supply or it may get false triggering from the large currents elsewhere in the circuit.

The fets seem to be upside down. They should be source to ground, drain to transformer.

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 11-27-2012, 05:54 AM
Hi duke37,
Thank you for the reply. Let me try your idea. I've ordered a 6-0-6 3A transformer at my local winding shop. If this experiment is success, then i am able to make an inverter in 780 INR(14\$)

Senior Member
Join Date: Jun 2011
Location: Kerala, India
Posts: 192

 11-27-2012, 06:10 AM
Hi all,
I tried this small inverter circuit (plz look image). But the out put is 66v AC. The transformer in this circuit is from an old 600VA ups and it's amperage is unknown. Any way when connecting this transformer to 230AC , i got a 6.5v AC in secondary. So i connect this to my circuit. Somebody please tell what is wrong with this circuit and how to fix this.
-Vinod
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