This circuit uses a diode as a radiation sensor. The operational ones are old because the publication is from the 80's, but modern low voltage equivalents can be tested.
Unlike the previous circuit, this circuit has a low impedance input. The components can be changed to...
This circuit from a 1978 American publication is used on vintage vehicles that still have contact...
Published in the August 1986 issue of Radio Electronics magazine, this circuit acts as a weapon,...