Steve M. Taylor wrote:
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Yes, but we don't know how many VA his transformer is rated at. It sounds like 24VA, with what ? 6% regulation ?

As long as we don't know, it would be best to start with the worst case condition, wouldn't you agree? Worse still: he might have connected his rectifier between the 12V windings. That would mean something like 14W for the poor ol' 7805.....

Rob.