Found in the CQ radio amateur magazine, this circuit generates a standard 100 kHz signal. The circuit is from 1965 and can be made with modern equivalent transistors.
This circuit was found in an American documentation from 1976. We can assemble it with two 741,...
This circuit trips when the input signal goes through zero, triggering a direct current load. The...
January 2017 - New ROHM TFZV series of zener diodes is now available from Mouser Electronics. The...