3-tube receiver (T1602E)

Found in a 1949 Radio Electronics, this circuit employs vacuum tubes of the time. Power supply not provided.

Switch with Diodes (CB19925E)
This configuration for switching signals uses only common general-purpose diodes such as 1N4148. The...
Electronic Slot Machine (CB6893E)
This digital electronic game circuit was found in a 1982 publication. It randomly draws the...
Sensible light relay 2 (CB22126E)
This version works in the opposite way to the previous one, activating when the light falls on the...