ssdf 1 MHz Astable (CB21828E)

This different astable configuration was found in one in a 1974 Ferranti transistor manual. Transistors are general-purpose types at the time.

Monostable LM3900 (CB13833E)
The circuit shown is from a 1974 integrated circuit manual. In it we have the monostable...
800 W dimmer (CB5294E)
This soft starter dimmer was found in a 1980s documentation. We can implement it with current...
Water or Moisture Alarm (CB11992E)
The contact of the sensor with water or humidity causes the relay to close its contacts. The...