LED Projects

Light Emitting Diode Projects

Category Archives: Camera

DIY LEDs as light detectors

Embedds admin in his post has perfectly written:  “From semiconductor physics we know that semiconductor junction when exposed to light becomes more conductive. So when LED cathode is connected to +5V and anode to 0V it simply charges as capacitor.Then program switches anode pin to high Z input and read its state. Depending on time taken […]

Transform old projector to truly digital

Matt‘s team found an old, single-slide, sans-carousel slide projector, which they up-cycled to the 21st century’s truly digital projector by adding a 10 Watt LED and a Nokia 1200 LCD. The build uses an ATmega88 microcontroller to control LCD images, and an infrared receiver to advance the slides and turns the projector ON and OFF remotely. […]