This is a constant current source using a FET. This is the most simple replacement to series resistor to limit current.
The N-Channel FET BF256C can give 15mA current.
Source:http://schematics.blogspot.com/2007/02/fet-current-source.html
Thank you.
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This entry was posted on Wednesday, May 14th, 2008 at 11:58 am and is filed under Power supply.
