This simple unijunction and bipolar generator appeared in Radio Electronics magazine in September 1865. It generates signals from 100 kHz to 60 MHz and is powered by two 9 V batteries.
This synthesized generator circuit was found in an article in October 1980 Radio Electronics...
This simple transmitter can send signals to distances up to 200 m, depending on the power supply...
This circuit makes use of an unusual component which is a large surface diode that can be used to...