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 circuit uses a metal enclosed transistor as a temperature sensor. The circuit is from an old...
May 2017 - Mouser Electronics already has Microchip's new MCP14A0451 and MCP14A0452 integrated...
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. It is...