Working
3mm red LEDs emit red light when a forward voltage is applied. The light is generated by the recombination of electrons and holes in the semiconductor material, which is specifically designed to emit red light. The typical wavelength of red LEDs is around 620–630 nm.
Applications
- Used as indicator lights in electronics and appliances.
- Signaling and status lights in devices.
- Used in displays and signage.
- Automotive lighting (tail lights, indicator lights).
- Lighting for alarm systems and visual indicators.
Specifications
- Forward Voltage: 1.8–2.2V
- Forward Current: 20mA (typical)
- Brightness: 1000–3000 mcd
- Wavelength: 620–630 nm
- Size: 3mm diameter
Pinout
The 3mm red 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).
