This circuit uses an optical coupler called Raystor created by Raytheon in the 1960s. The circuit uses components from the era that can be changed. The current is low.
Bis This two-transistor circuit was found in the January 1994 issue of Electronics Now magazine. The...
We found this circuit in an old English documentation. The circuit can employ other gates and...
The circuit of the figure operates in an overtone of the crystal frequency, that is, in the...