This circuit for communications receivers was found in the January 1974 issue of Radio Electronics magazine. The transistors are Japanese types of the time, as the circuit was part of equipment of that origin.
This circuit causes a green LED to light up when we step on the brakes and the rear lamps to light...
This circuit can be used to show the direction of current flow in semiconductors, such as LEDs....
Found in 80's Radio Electronics, this circuit uses an LED to indicate that a battery is being...