This circuit of 1965 documentation makes use of a tunnel diode to retard a pulse without distortion. The components are from the era.
Two rows of LEDs run in opposite directions when light strikes the sensor. This circuit was found...
Using this circuit the lamps glow in sequence in a speed given by the capacitors. The SCRs present a...
This power step for relay activation was found in the 1964 RCA transistors manual. The circuit is of the...