6 volts from 12 volts

[barebones]

How do I obtain 6 volts dc from a 12 volt lead acid battery, I would like to run a broadcast receiver which requires 6 volts.

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[halcyon]

How close to 6 volt does it need to be, and how much power?

But basically you need a LM7805 regulator with one or two diodes in the neg pin, this will give around 6.0-6.2 volt.

Brian

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[VicS]

Does your broadcast receiver not run on dry batteries. I cant help thinking that is the simplest solution.

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[Joe_Cole]

If you've got a cigar lighter socket on board then you can get an adapter that plugs in and gives you a range of selectable voltages. Maplin do one for a few pounds. If you haven't got a socket Maplin do those as well!

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[domlee]

Cheap and cheerful solution...I once got 6V from a 12v lead acid battery by drilling into the middle of the battery from the top and screwing in a threaded 'post'. The battery consisted of 6 plates each delivering two volts, by tapping into the third plate I was able to extract the required 6V.

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[wooslehunter]

Buy an adaptor.

If you do want to build something then an LM7806 is a 6v version of the 7805 above. It's not just as simple as that though since 13.8v -> 6v at 200mA will dissipate 1.5watts - you'll need to heatsink the device.

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