This 80's Hands On Electronics circuit automatically switches from high light to low light when an oncoming car illuminates the sensor. The circuit is powered by the car's own battery.
We found this circuit in a 1964 Electronic Design. It divides the frequency of a 20 MHz signal by...
This circuit was found in the November 1987 Radio Electronics magazine. The trigger voltage is...
This high-powered megaphone circuit is from a Radio Electronics from December 1964. Note the use...