JFET amplifier stage (CB7523E)

This circuit was found in a 1982 Maplin documentation. The configuration applies to almost any JFET.

Regenerative receiver (CB22273E)
This simple 1 transistor circuit was found in an American documentation from the 60's. The...
Code practice oscillator (CB7314E)
Found in a magazine 73 for radio amateurs, this circuit makes use of general purpose transistors and...
Automatic Faucet (CB18147E)
The presented circuit allows to control the valve of a tap. The positioning of the emitter and the...