Rail to Rail Oscillator 555 (CB9099E)

Found in an Electronic Design from the 80s, this circuit generates a 500 Hz signal and can be used as a shield

Bench thermometer (CB20501E)
With an ultra-low consumption, this circuit can be powered by solar cells. The circuit is from a...
Signal conditioner (CB9453E)
This circuit is intended to recover a very weak signal at a receiver, for example, a CW signal or a...
Inverter for car ignition (CB6389E)
Found in a Motorola documentation from 1965, this circuit consists of an electronic ignition with a...