Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the capacitors used. The circuit is from a Radio Electronics from December 1989.
The purpose of this circuit is to automatically turn a water pump on and off. Sensor 1 is the...
This circuit was found in Motorola's 1967 documentation. The circuit makes use of power...
This interesting circuit appeared in the April 1952 Radio Electronics magazine. The circuit is...