Broadband Amplifier (CB21859E)

This circuit has a voltage gain of 30 times and passband of 14 MHz. The circuit is from the 1974 Ferranti transistor manual.

Two Transistor DC Motor Control (CB12043E)
This circuit was found in an old publication from 1989 but can still be assembled today with BD135...
Automatic Garage Lamp (CB16634E)
We found this circuit in a 1987 documentation. Its purpose is to turn on a garage light using the...
Logic level indicator 7400 (CB22407E)
In the figure we have a simple logic level indicator for TTL circuits or powered by 5 V....