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.
In the figure we have the simplest configuration with a voltage regulator transistor. The voltage...
This circuit originally came out in a Budget Electronics from 1981. The American magazine no...
This circuit was found in an Electronic Design from the 80's. It shows how to use a MOSFET driver with...