The original application of this 1967 Ferranti circuit can be changed so that it functions as a pass sensor shield for gears and other moving objects.
With this circuit it is possible to receive signals from the 150 MHz band on common AM radios for...
The MC1413 ULN2003 integrated circuit consists of a 7-bit step motor control, with 50 V x 500 mA...
This circuit was found in the May 1989 issue of Radio Electronics magazine. The components can be...