This is a field strength meter found in an 80's Hands On. The circuit operates at frequencies up to 500 MHz and has a buzzer as its indicator. Can be used as a detector for spy transmitters.
This circuit is from a 1968 Electronic Design. The components are from the era and the operating...
August 2017 - Mouser Electronics has already received the XBee® Cellular 3G modules with built-in...
This circuit was found in a General Electric documentation from 1966. It uses discrete components...