Found in na 1980’s English magazine, this circuit produces a strong modulated tone reproduced on a speaker. The power MOSFET can be of almost any type.
This 600-ohm output impedance circuit was found in a Radio Electronics from October 1963. The...
Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook....
The circuit presented was obtained in a technical documentation from National Instruments. The...