IR LED control no resistor - CircuitLab
IR Transmitter and Receiver
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IR Communication - SparkFun Learn
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Reflective Infrared IR Optical Sensor with 470 and 10K Resistors : ID 2349 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
infrared - Understanding voltage and current of a phototransistor w/ collector resistor - Electrical Engineering Stack Exchange
IR LED without resistor nano - General Electronics - Arduino Forum
arduino - Why use a transistor to drive an LED? - Electrical Engineering Stack Exchange
The electronic circuit connecting the phototransistor and an IR LED to... | Download Scientific Diagram
Wiring up the infrared LED | Infrared Bird Box | Coding projects for kids and teens
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Infrared Obstacle Detector for Less Than $1 — Maker Portal
Best IR LED Circuit - LEDs and Multiplexing - Arduino Forum
Activity 1: Build and Test the Object Detectors | LEARN.PARALLAX.COM
Ohm's law - LED resistor calculation | LEDnique
IR Emitter LED 940nm 5mm (5-Pack) - ProtoSupplies
![Amazon.com: Adafruit Super-bright 5mm IR LED (25 pack) [ADA388] : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/411XdshY6jL.jpg "Amazon.com: Adafruit Super-bright 5mm IR LED (25 pack) [ADA388] : Electronics")
Amazon.com: Adafruit Super-bright 5mm IR LED (25 pack) [ADA388] : Electronics
Adding LEDs - udamonic.com
Resistors for LED Circuits | Resistor Applications | Resistor Guide
Generating a 36kHz carrier signal for use in a IR LED array using UNO - LEDs and Multiplexing - Arduino Forum
Control LEDs Using IR Remote and Arduino
