Crystal Pierce Oscillator (CB6149E)

This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate crystals. Components are still common today.

| Clique na imagem para ampliar |

Capacítancemeter (CB3878E)
This circuit uses an oscillator that generates a signal of approximately 1450 kHz to test...
Light-Controlled Oscillator (ll) (CB115)
Light falling on the transistor changes both the mark and the space of the generated signal thanks to the...
Basic Monostable with the 555 I (CB1295E)
This basic configuration can be found in a lot of articles on this site. In this case, the relay...