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.
With a strong positive feedback (via a 10 M resistor) we can get the trigger setting for the...
This very simple brake light circuit is activated with the brake lights, just connecting it by...
This simple circuit uses an SCR to lock the alarm once triggered. The circuit is from an English...