Triac activated switch (CB9088E)

This circuit is from an 80's Radio Electronics. It triggers a load powered by the power grid from the audio signal captured by the microphone.

| Clique na imagem para ampliar |

Unijunction Proportional Control (CB16914E)
This circuit is from an old French publication. With it we can have full wave control of a charge...
Divider by 5 in second version (CB25364E)
This is an improved version of the previous circuit also found in the December 1990 Radio...
Wideband 4046 VCO (CB25247E)
This VCO with the 4046 PLL generates signals from 0 to 1.5 kHz. The circuit is from a Radio...