EEVblog #506 - IR Remote Control Arduino Protocol Tutorial

Thanks Great Video

Thank you for this video, it was explained very easily and simply. 🤝

I've been trying to control my AC for a week now, exhausted, and still can't figure it out. But I know I'm close! I will try your code now, but I'm not sure where you got your IRcode from. Did you convert Adress or Command to binary or what? Would appreciate your quick input mate, thanks alot.

Very nice, thank you.

I found a way to do all of this using only my phone and a dongle i made myself
And ir sensor transmitting it's raw signal as microhpoen input through the headphone jack, and an osciloscope application

Thanks for this video Dave! Your code is much more elegant and easier to understand than any of the IR libraries online. I was able to modify it to duplicate a Sony AV remote and it worked!

Thanks, the missing puzzle. Thought the receiver was a dumb photodiode, but it must do some 38kHz filtering. You would expect there is a 5V input transmitter that does the 38kHz thing as well, so you can send the yellow simple signal, and have the 38kHz magic applied on your digital output. Does anybody know if that exists?
Try to program without delays though. Run either a 38kHz loop frequency, or use a hardware timer with an interrupt routine.

Calibrate you’re probes

Excellent explanation, thanks for showing how things actually work by theory using the oscilloscope.

Guys, anyone has any idea how could I amplify (current only) of pulses coming to the IR led and use higher power led instead. Let's say 2-3 amps instead of 20-30 mA. Any ideas for transistor circuit?

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Thanks Dave!
i used your code to make a AC ON/OFF control for the Dometic HB2500 Airco. As far as i known no replacement remote controls are available for this Dometic HB2500 so i am making my own to help out a neighbour. He was told to buy a new Airco for his RV when his remote control broke down.
Greetings from the low lands :-)

i have dificulty apply this methode to stm32f103c8t6 blue pill,

diodee :-)

Amazing video with some nice tips here and there. Great stuff.

but without Arduino it would be quite difficult to make it...

Great video, just what I needed to understand how IR remote controls work :)

David - it’s an older video but I found it really useful! I’ve been recording a custom protocol used on original Macintosh keyboards (pre ADB) and plan to do an Arduino implementation. Your segment about using the Arduino and pitfalls to be mindful of confirmed the best practices I was anticipating - thank you!

Every single Arduino project doing exactly this makes a point of stating how over complex the IR libraries are. It might be time for a re-write.

Try this(for Leonardo so the pins may differ on Uno):

PORTC |= (1 << 7); //13 on
PORTC &= ~(1 << 7); // 13 off

Always great videos...ive watched you even before i started engineering and you're the real deal!

What if I wanted to completely bypass the LED and directly manipulate the receiver pins on the input device? Would I still need to worry about carrier frequency if I had literal wires connecting the Arduino to the IR receiver contacts?

Wow!!!. This video is really helpful.

Sir Could you please Decode an SHARP A/C (Air conditioning)Remote ???

I want to make a remote controller on Arduino (IRrecv+IRsend+sleep). In which it should read IR data usingtsop1738 then send the desired IR data using IR transmit led. And when no data is received it should go to deep sleep to conserve battery. Because I want it to run on 3v lithium coin cell. I found many codes on the internet using Irsend + sleep or just IRsend + IRrecv. But not a combination of all the three. If you make the code for the same it will be helpful. Need for this project=== some channel nos on my tv are 4 digits. It is very difficult to press 4 keys. So my plan is to press only 1 key tv remote and my controller will send desired 4 distinct key codes to tv by sending cancel command to my 1st command press by me on my tv remote

Again got help from here after so many years, thanks Dave , you are a legend.

Do it with car key fobs

By far one of the best explanations of IR signaling I've ever seen or read ... I definitely understand it 50% better than I did before watching the video ... but I am still uncertain how this knowledge can be applied to different protocols such as Sanyo, Sony etc. I'm going to power up the scope and see what I can figure out. Thank you for once again producing a quality electronic tutorial.

Hey dave, quick comment about your code there. The NEC protocol recommends a duty cycle of between 25 to 33% for the carrier, to conserve power.

the BEST EVER tutorial about IR works. TOP! thanks!

Thanks! Very clear explanation.

Thanks for this! I love tutorials like this.

Using this I've been able to decode my remotes ok, except my remote for my Pentax K50 camera. The Shutter code is 8DCDAE60 but the scope is a very short burst which could not be 8 bytes of characters. I have a picture of the scope output if you have an address to receive it.. This has confounded me.

What is the part number of infrared phototransistor?

Thanks so much for this. With this code and some remote control codes I found on the web I managed to regain remote control of my amplifier. It worked on the first try.

you talking a lot and quick. i am getting mad

Timely video for me to run across even though it's 5 years old.

WoooW what an oscilloscope _

Great video! Very helpful - Thank you.
Subscribed!

Dave, there exists (or did) an IR receiver with a carrier frequency of 455kHz. I have succeeded in sending audio over this IR module (something like a TL9000--but I seriously doubt that's the exact part number since it's been so long). Most interesting of all is I managed to send DTMF codes over it (to a DTMF decoder) for remote control applications, and even multiplexed and patented it after I added a feature that allowed more than one DTMF encoder button to be pressed and held continuously with a receiver modification to match. Then this wonderful high frequency IR decoder was discontinued--go figure. I think I got all mine from Vishay...still got a few of them though.

How do I write this code in fpga(verilog) for Spartan 6

Is it possible to encapsulate a non-nec protocol inside of a nec protocol?

I've done this once. My solution for the carrier was to use the PWM module in the PIC I was using at the time to generate it. One side of the LED went to the PWM output pin, the other went to a pin with the data.

Are you using a freetronics eleven?