How to Build an IR LED Circuit
Best IR LED Circuit - LEDs and Multiplexing - Arduino Forum
LED - Infrared 850nm - COM-09469 - SparkFun Electronics
Basic Light Emitting Diode guide - DP
IR Emitter LED 940nm 5mm (5-Pack) - ProtoSupplies
How Does a 5mm LED Work? - LEDSupply Blog
LED Resistor Calculator
LED as Zener diode. Design Note 37 – Mohan's electronics blog
Basic Light Emitting Diode guide - DP
12volt Halogen Voltage Drop Chart
How To Calculate The Voltage Drop Across a Resistor - Electronics - YouTube
Series LED Resistor Calculator - Electrical Engineering & Electronics Tools
How figure out current draw (of LEDS) using a DMM and resistors:
When and Why do LEDs Need Current Limiting Resistors? | Waveform Lighting
Use LED in Robot Projects - Oscar Liang
Optocoupler led
Time -Voltage drop at 12V with 5Watt LED bulb as load | Download Table
Driving an IR LED: constant current source or not – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
LED Resistor Calculator
LED Series Resistor Calculator | DigiKey Electronics
For LEDs, what's the difference between forward voltage and voltage drop? - Quora
Light-Emitting Diodes (LEDs) - learn.sparkfun.com
Product Document
batteries - 9V powering to the safest maximum brightness of 4 IR LEDs in series - Electrical Engineering Stack Exchange
What is the maximum voltage for an LED? - Quora
