We found this circuit in a 1967 documentation. The integrated circuit and an operational one of the time. Modern equivalents can be tried out. The power supply is symmetrical.
Luminus SST 20 Deep Red LED Mouser Electronics is announcing in its stock the SST-20, a 60%...
This 4093 IC continuity tester was found in the November 1986 Radio Electronics magazine. The...
This receiver circuit was found in a Hands On Electronics from the 90s. The circuit uses a PLL...