Using a MAX644 this circuit was found in the April 1989 issue of Radio Electronics magazine. The circuit is for a 5 V voltage and 50 mA current output.
We obtained this circuit in a Maxim documentation from the 90s. The circuit is based on the...
This circuit was found in a 1965 General Electric publication. The circuit can be adapted to...
Based on Radio Shack 276-137, this circuit was found in the December 1995 issue of Electronics Now magazine....