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Project Notes

#074 TestIR

Tests raw IR reception.

Notes

An exploration of IR Sensor reception based on the adafruit sample code available here.

I’ve cleaned up the code a bit and modified it to optionally pump data out for plotting with PlotNValues (a simple Processing sketch). This provides a simple graphical illustration of the PWM characteristics of IR protocols.

Here’s a sample trace of the “0” key being pressed on a common MP3 player remote control:

processing trace

And another showing an LG remote contol “power on/off” key press:

processing trace

This all got me reading IR Remote Control Theory to better understand operation and protocols. Next step is to start decoding the signals, however for that I might avoid re-inventing the wheel and instead try the IRremote library.

Construction

The Breadboard

The Schematic

The Build

Credits and References

About LEAP#74 IRArduino
Project Source on GitHub Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is my personal collection of electronics projects, usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting (IMHO!).

The projects are usually inspired by things found wild on the net, or ideas from the sources such as:

Feel free to borrow liberally, and if you spot any issues do let me know. See the individual projects for credits where due. There are even now a few projects contributed by others - send your own over in a pull request if you would also like to add to this collection.