piclist 2004\06\30\082528a >
Thread: Driving ATtiny11 with 9v battery
www.piclist.com/techref/power/batterys.htm?key=battery
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face BY : David VanHorn email (remove spam text)



At 08:01 AM 6/30/2004 -0400, Mr MCU wrote:

>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.

So you've removed both regulation, and reverse polarity protection as features of this design?

I like the parallel version better.

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<5.1.1.6.2.20040630072410.0213b130@mail.cedar.net>

In reply to: <40E2AB96.10009@sgi.net>
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