This circuit was obtained from an American technical manual from the 80's. The integrated circuit is an operational of the time that can be replaced by a modern equivalent.
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...