Oscillator for the medium wave range (CB21140E)

This ground-based circuit was found in 1990s American documentation. The transistor can be any general-purpose equivalent.

| Clique na imagem para ampliar |

Voltage Controlled Current Regulator I (CB19943E)
This circuit was found in documentation from the 1980s. The transistor depends on the desired...
Multiple Alarm (CB20628E)
We found this circuit in a 1985 technical publication. The circuit uses PUTs to drive lamps....
Zero crossing detector (CB20624E)
This type of circuit, found in American documentation from the 1980s, triggers producing output...