LED Resistor Calculator
batteries - 9V powering to the safest maximum brightness of 4 IR LEDs in series - Electrical Engineering Stack Exchange
Light Emitting Diode or the LED Tutorial
LED as Zener diode. Design Note 37 – Mohan's electronics blog
12volt Halogen Voltage Drop Chart
Product Document
IV curves | LEDnique
LED Voltage Drop Chart for Magnetic Polarity Detector Circuit | Led voltage, Hall effect, Led
LED - Infrared 850nm - COM-09469 - SparkFun Electronics
Infrared LEDs
Best IR LED Circuit - LEDs and Multiplexing - Arduino Forum
How to Build an IR LED Circuit
Time -Voltage drop at 12V with 5Watt LED bulb as load | Download Table
LED Series Resistor Calculator | DigiKey Electronics
How Does a 5mm LED Work? - LEDSupply Blog
Series LED Resistor Calculator - Electrical Engineering & Electronics Tools
Forward Voltage and KVL | All About LEDs | Adafruit Learning System
IR Emitter LED 940nm 5mm (5-Pack) - ProtoSupplies
For LEDs, what's the difference between forward voltage and voltage drop? - Quora
The Forward Voltages of Different LEDs | CircuitBread
Driving an IR LED: constant current source or not – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
