Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz signal from a 4.1952 Hz crystal.
This circuit is powered by only 3 V and can flash white LEDs from 3.2 to 3.6 V, as it includes a voltage...
This control circuit for direct current motors uses a 741 and an operational one of unusual power...
This circuit is from an English documentation from 1968 but can be assembled with modern...