This wide-range radiation monitor was found in a 1980s documentation. The circuit uses a diode as a sensor and is quite critical requiring shielding shown in dashes to prevent snoring due to gain.
Found in an old English publication this circuit uses a dual gate MOSFET. Coils not specified....
We found this electronic analog multimeter in a 1998 documentation. What sets it apart from...
This circuit causes the LED to flash at a frequency determined by the capacitor and resistor...