High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Timer Using 7555 (CB860E)
This circuit can be used in the car to control the windscreen wipper or with other appliances at...
Modulated Siren (CB6024E)
A modulated (flashing) siren using the four gates of the 4001 integrated is shown in the figure....
High Voltage Power Supply (CB1228E)
This source was obtained from a former publication for valves but also serves for powering common...