This circuit shows how to make an adaptation on an AM receiver to receive CW and SSB signals. The circuit is from an 80's documentation. The diode is commonly used.
This variation of the previous circuit produces a pulsating sound when the sensor is activated. The...
The circuit shown simulates a programmable unijunction transistor (PUT). Transistors may be common...
Suggested by an American publication, this circuit has 5 operating conditions indicated in the...