This circuit can work with almost any JFET. The circuit is from an Electronics Now from April 1993. It is powered by a 12 V battery, but can also be powered by 9 V.
Using Linear Technology's LTC4252-1, this circuit was found in a 2005 manual. The circuit makes use of...
This circuit is from a current regulator up to 1 A, ie a constant current source. The LM320...
This blinker for LEDs up to 500 mA was found in General Electric documentation from 1970....