>> On the subject of batteries and safety;

I'm a little surprised that there haven't been more "accidents" with
old circuits and new batteries.  The hobbyist books used to be full
of "tickler" circuits and such that claimed "This circuit is made safe
by low power delivered by a typical dry cell.  Do NOT connect to an
AC power supply."  That was then; these days a typical battery can
deliver a lot more power...

BillW
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