Battery charger (CB9121E)

Found in an Electronics Now from the 1980s, this circuit uses some components that are still common today. For others, equivalents can be tested.

| 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...