Bike speedometer (CB20497E)

This circuit can be powered by a solar cell. The circuit is from a 1991 documentation having a phototransistor as sensor.

Monostable Triggered by Switch (CB16310E)
This circuit allows to obtain an output pulse independent, in duration, of the action time on...
Exclusive NOR Oscillator (CB11482E)
This TTL circuit was obtained in a 1985 Italian magazine, but it can be easily implemented, as the...
High Output Voltage Regulator 78xx (CB15164E)
In this circuit, the output voltage is Vxx plus the zener voltage. The circuit is from the SGS...