Windshield wiper tiner (CB9523E)

Found in old documentation, this circuit can be implemented even today with the use of a 2N2646 for the unijunction and a TIC106 for the SCR.

| Clique na imagem para ampliar |

Medium Wave Transmitter (CB21736E)
Found in Popular Electronics of January/February 1969, this transmitter has a few meters range and can...
Constant current regulator for lamps (CB8696E)
Found in 1969 RCA documentation, this circuit maintains constant current in the filament of a lamp...
Two-tone decoder (CB8719E)
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...