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.
This CMOS oscillator has the signals produced by a 4093 that excites a flip-flop. The circuit can...
This simple circuit causes an LED to flash at times whose active cycle is determined by C1 and C2....
Although it is a common configuration today, these circuits were taken from an old publication. The...