Found in Fairchild documentation from the 90s, this circuit generates signals with the characteristics given next to the diagram. The power supply must be symmetrical.
This circuit is like the previous one except that it can be triggered electronically. The circuit is...
Found in 90s Radio Electronics, this audio indicator makes use of an integrated circuit that is...
Found in the October 1992 Radio Electronics magazine, this oscillator is controlled by switch S1....