Tuesday, October 23, 2007

SPDT idea

Jerry Chevalier asked:
Has anyone ever come up with a board or a way to handle an auto switching source of power?

For example: I am plugged into a AC outlet. If I unplug the AC and the master switch is on then it reverts to battery power?

If I am on battery and I connect back up to AC then it shuts off the battery source. A UPS board sounded like it would work but I haven’t had too much success with that

I decided to take on this challenge and came up with the following wiring design.

I am not sure this will work, and I am looking for validation. There are a few versions of this on the message board, but this is the final version.

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