In a September 1992 Radio Electronics article, we found this basic 555 circuit used to generate fixed times. Capacitor C1 and resistor R1 determine the time. The circuit drives an LED.
This circuit was suggested by Motorola in 1980s documentation. The circuit employs an operational of...
We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the...
This circuit is from a 1980s documentation featuring two time constants for sound decoding. The...