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.
CHANDLER, Ariz., June 14, 2017 — New PIC32MM “GPM” microcontrollers (MCUs) are now available from...
Found in an English publication from the 1960s, this circuit uses period components, including the...
The A3906 integrated circuit from Allegro Microsystems (www.allegromicro.com) consists of a PWM...