IR LED 940nm – Infrared Emitter for Night Vision & Remote Control
IR LED 940nm – Infrared Emitter for Night Vision & Remote Control
This 940nm infrared LED emits invisible light ideal for night vision, remote controls, object sensors, and proximity switches. Works with Arduino, ESP32, and Raspberry Pi. 5mm clear lens, low 1.25V forward voltage.
Key Specifications
| Peak Emission Wavelength | 940 nm |
|---|---|
| Forward Voltage (VF) | 1.2 V – 1.4 V (1.25 V typ. @ 20 mA) |
| Forward Current (Continuous) | 30 mA (max. 50 mA peak) |
| Power Dissipation | 75 mW |
| Viewing Angle | 20° – 30° |
| Lens Color | Clear |
| Package | 5 mm Round Through-Hole |
| Lead Spacing | 2.54 mm (0.1 in) |
What You Can Build With This
- Infrared proximity detector: Pair with an IR photodiode to build an obstacle‑sensing alarm using an Arduino Uno and a buzzer.
- WiFi‑controlled remote: Use an ESP32 to broadcast IR commands over WiFi to control a TV or air conditioner from a smartphone.
- Night vision illuminator: Drive an array of these LEDs with a Raspberry Pi and a PIR sensor to automatically light a dark room for an IR camera.
- CBSE Class 11–12 / ATL Lab: Demonstrate optical wireless communication by sending Morse code pulses between two Arduino boards using IR emitter‑detector pairs.
- B.Tech final year / Smart India Hackathon: Design a multi‑channel IR data link for secure line‑of‑sight transmission between devices, with error detection and protocol implementation.
Compatibility
| Platform | Compatible | Connection | Library / Method |
|---|---|---|---|
| Arduino Uno R3 | Yes | Any digital pin (e.g., D2) via 220Ω resistor to anode; cathode to GND | digitalWrite() |
| Arduino Nano | Yes | Any digital pin (e.g., D3) via 220Ω resistor | digitalWrite() |
| Arduino Mega 2560 | Yes | Any digital pin via 220Ω resistor | digitalWrite() |
| ESP8266 NodeMCU | Yes | Any GPIO (e.g., D4) via 220Ω resistor | digitalWrite() / ESP8266WiFi |
| ESP32 Dev Board | Yes | Any GPIO (e.g., GPIO15) via 220Ω resistor | digitalWrite() / IRremoteESP32 |
| Raspberry Pi Pico | Yes | Any GP pin (e.g., GP0) via 220Ω resistor | machine.Pin() |
| Raspberry Pi 4 / 5 | Yes, with transistor driver | GPIO (e.g., GPIO17) to NPN transistor base, LED via collector with 220Ω resistor; emitter to GND | RPi.GPIO or gpiozero |
Wiring and Interface Notes
Connect the longer anode leg to a digital output pin through a 220Ω current‑limiting resistor. The shorter cathode leg goes directly to GND. Never exceed 30 mA continuous current, and match the resistor value to your board’s logic level (3.3V or 5V) to avoid damage.
Frequently Asked Questions
Does this IR LED produce visible red light when powered on?
No, it emits light in the near‑infrared spectrum (940nm) invisible to the human eye. You can quickly check operation by viewing the LED through a smartphone camera, which will show a faint purple glow.
Can I use this LED as a direct replacement in standard remote controls?
Yes, 940nm is the wavelength used in most consumer IR remotes. Ensure your circuit drives the LED with the correct current and, for longer range, modulate it at the typical 38 kHz carrier frequency.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items