[sdiy] neophyte question - 9 volt battery to CV control

[harrybissell at wowway.com]

Yes it will work.  I assume that you want a 0-5V output. while you can
use a fixed resistor and a pot, the voltage will slowly go down as the battery
dies.  I'd use a 1K resistor from the positive terminal in series with
a 5.1V zener diode to the negative terminal. Put a 10K pot end terminals
across the zener, and take your output from the wiper (and negative battery
terminal).  This should last a long time and be very stable.

H^) harry



On Thu, 4 Sep 2008 00:35:17 -0400, ahlist wrote
> Hi,
> 
> I'm new to all this. In my inexperience, I envision something like 
> the following:
> 
> a 9 volt battery attached to some resistors(?) to take down the
> voltage attached to a potentiometer attached to a CV input.
> 
> Would something like this work?
> 
> The end goal would be to use similar analog outputs from a
> micro-controller to the CV input.
> 
> All advice and education appreciated.
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Harry Bissell & Nora Abdullah 4eva