This circuit was found in the April 1998 issue of Electronics Now magazine. The circuit uses common operational amplifiers and uses a dual power supply.
This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote...
This circuit was found in Radio Electronics magazine from January 1959. The power transistor must...
This circuit uses an MW radio tuned to around 540 kHz to detect atmospheric signals, for example, from...