220 mW Amplifier (CB20054E)

The output transistors can be BC548 and BC558. The circuit is from a 1975 documentation showing a frequency response from 90 Hz to 12.5 kHz.

| Clique na imagem para ampliar |

555 Delayed Pulse Generator (CB24440E)
This common 555 circuit was found in documentation from the 90s. The circuit uses two 555s and the...
Garage Timer (CB21432E)
Found in General Electric and 1967 documentation, this circuit automatically turns off the...
Unijunction Transistor Teste (CB1357E )
This tester for common unijunction transistors is nothing more than a low frequency oscillator...