This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4 LEDs flashes continuously at a speed given by C1 and the setting of R3.
Found in a 90s Popular Electronics, this circuit is interspersed between the filter and the...
This is the simplest function that triggers the load if the level of the input signal is 1. In...
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...