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Thread: Driving ATtiny11 with 9v battery
www.piclist.com/techref/power/batterys.htm?key=battery
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face BY : Mr MCU email (remove spam text)



Seem like everyone forgets that zener diodes actually subtract their
voltage if placed in series.  e.g. I would use a 1N4730A in series with
the 9V.  That would give you 9V - 3.9V = 5.1V ... perfect supply up to
1W!  Although it does not regulate, you really don't need regulation in
your example as I see it.  I would also use a 1N400x series diode for
reverse polarity protection - if so just use a 1N4728A to make up the
additional voltage drop.

MGB,

- Mike



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<40E2AB96.10009@sgi.net> 7bit

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Subject (change) Driving ATtiny11 with 9v battery

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