The reference voltage for this circuit can be selected digitally. The circuit is from Radio Electronics dated February 1981. The 741 must be powered by a symmetrical source.
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
The 4066 is better than the 401 B because the 401 B has a lower internal resistance when the...
This circuit transmits beeps to receivers tuned in a wide range of frequencies placed nearby. The...