60's crystal radio (CB22171E)

Found in an English publication from the 1960s, this circuit uses period components, including the commercial grade coil.

Voltage Doubler using the 555 - II (CB1234E)
This traditional doubler configuration with the 555 IC can be found in other articles on the...
Neon Head or Tail (CB11603E)
This traditional circuit with a neon lamp is a flip-flop that draws which of the two lamps will...
Indicator for windscreen wiper (CB6038E)
This sophisticated circuit is from old Motorola documentation, using common integrated devices...