We found this good power amplifier with the LM12 integrated circuit in the March 1989 issue of Radio Electronics magazine. The output power is around 100 W.
This circuit allows the coding of several relays from coded keys that must be activated, according to...
This circuit is from 1988 documentation. It uses a range of 30 LEDs driven by 4017 integrated...
Found in a 1970 publication by General Electric, this circuit makes use of a mobile...