LED Circuits & Projects

This circuit is very interesting because, unlike emergency lighting circuits that use incandescent bulbs, it uses high-efficiency LEDs.

This Energy-saving Flashing Pilot Light Circuit is intended to give us a visual warning that we have electronic equipment turned on. This is especially important on equipment that uses batteries.

Bike Flashing LED Lights Circuit. If you’re a cycling fan, and you like biking, night and day, this useful circuit will make you to be visible and safe

This is a simple flashing lights circuit uses high-intensity white LEDs that turn on and off continuously. It may be placed in any part of the body, such as an arm.

This Time Delay Light switch circuit is useful to illuminate locations where a low power light source is needed. A closet, a car trunk, are good examples.

This automatic night light circuit with a LED is simple, interesting and very easy to do. The circuit allows a better understanding of the operation of a phototransistor and thus be able to use it in other applications. (PCB)

This Electronic two-way traffic light circuit achieves the functionality of a typical two-way traffic light using a 555 timer and a CD4017 decade counter.

LED Sequencer using 4017 Decade Counter (LED Chaser). This circuit has 10 LEDs connected to the decade counter outputs. LEDs light up in sequence. Only one LED is ON at a time

This circuit shows one or two LEDs directly connected to the outlet (120 VAC or 240 VAC). The reduction of the AC input voltage to one that is suitable to use in a LED diode is achieved using a capacitor and a resistor.