I use an LM317 regulator setup in constant current mode. I use a 1k
feedback resister from vout to adj and take my positive voltage off of
adj. I get my negative straight from the power supply. The 1k resister will
get you a constant current of 1.7ma. Play with the value of the resister to
adjust it to whatever current you desire. The LM317 are 52 cents a piece at
Digikey here:
http://rocky.digikey.com/scripts/ProductInfo.dll?Site=US&V=14&M=LM317LZ
Dave
http://pages.sbcglobal.net/davebe/clay.html
At 07:32 AM 4/11/03, you wrote:
I am generating my CS with 17 V DC power supply, but have to constantly
monitor the current to keep it down. Does anyone know where I can find a
circuit diagram of whatever it takes to make this a constant current, as
the CS resistance goes down it will automatically keep the current down at
a preset level so I don't have to monitor it.
Thanks
Jim
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