Working
3mm white LEDs emit white light by combining red, green, and blue wavelengths or using a blue LED coated with a phosphor layer. When a forward voltage is applied, electrons recombine with holes, releasing energy as visible light.
Applications
- Used as indicator lights in small electronic devices.
- Flashlights and handheld torches.
- Decorative and mood lighting.
- Backlighting for displays and instruments.
- DIY and hobby projects requiring compact LEDs.
Specifications
- Forward Voltage: 3.0–3.3V
- Forward Current: 20mA (typical)
- Brightness: 1000–3000 mcd
- Viewing Angle: 20–30 degrees
- Size: 3mm diameter
Pinout
The 3mm white LED has two pins:
- Anode (+): The longer pin, connected to the positive terminal of the power supply.
- Cathode (-): The shorter pin, connected to the ground (GND).
