LED Projects

Light Emitting Diode Projects

Tag Archives: capacitor

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 […]