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.
This protective circuit for power lines was found in a Radio Electronics from November 1957. The...
A pulse of light applied to the sensor of this circuit causes the load connected to the triac to...
This circuit, which uses a planar silicon sensor, is from a 1964 Electronic Design. The component...