This receiver was found in an article in Electronics Now magazine in March 1994. The coils are critical, as shown in the figure. Listening is through headphones.
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...
This control of DC motors for currents up to about 200 mA was obtained in an American publication of...
This interesting circuit was found in an 80's Electronic Engineering. The circuit has a 50% active...