This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
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...