Jim 
  Go to Mouser electronics part no 610-1N5287 is a 1 Mill Amp Current Reg
Central Diode
 this will keep you current at rated out put provideing you have sufficient
voltage
(may be lower at start depending on power supply) but never more the rateing
There is a wide variety of sizes I use 1 MA but have know people use other
sizes like 1.6 MA
This in line on plus side will give you constant current (just get Diode in
right direction)
Price is very cheap

Bob

-----Original Message-----
From: Jim [mailto:kf4...@papadocs.com] 
Sent: Friday, April 11, 2003 8:33 AM
To: *Silver-List*
Subject: Re: CS>RE: constant current


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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