Divider by 5 Counter (CB25363E)

This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has a 50% duty cycle. It must be powered by 5 V.

| Clique na imagem para ampliar |

Biestable Touch Switch (CB10246E)
This circuit is from an English magazine of 1977. The circuit is still current, just using BC547...
Battery Charger (CB16778E)
The adjustment of the maximum load voltage is made in the trimpot. The circuit is from 1994...
Differential Amplifier (CIR18634E)
In the figure we have the conventional configuration of a differential amplifier with the...