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IR remotes use various different coding schemes (SIRC's, RC5, NEC etc.) and also use specific device and instruction coding, so you need one that matches on all three requirements - but a TV remote should NEVER work an air-con unit.
I think that what Nigel G meant was that it would be a certain PR disaster and possible actual disaster if the TV remote turned on/off the AC.
If you are making your OWN transmitter, it should be doable and you are one who could do it
Pardon me... I meant that a TV remote should not accidentally affect the A/C.Hi,
What makes you say 'disaster' ?
I know several people who would love to be able to use their TV remotes with their AC units. Look on the web too, people wishing they could do it, and ever one FAKE where the kid pretends to be able to program his TV remote for his AC unit, where the technique was clearly fake and would never work. People commented that they would love to do that, but others commented that it did not work (no surprise there).
"One For All" remotes and similar are able to do a LOT of different devices, why not an AC unit. They even control computers now and lights and all kinds of automation for the home.
Pardon me... I meant that a TV remote should not accidentally affect the A/C.
If the subject is universal/learning remotes, then there's no good reason it should not be allowed or possible.
I live 5 miles from the ocean with no need of an A/C, and am thus a little out of touch about this.
I have a timing circuit now all i have to do is connect the pin photo diode with maybe a transistor amplifier so the microcontroller can read it.
No, use a proper IR receiver IC, they do all the demodulation for you and give you a nice clean (low frequency) pulse train to decipher, you don't want to see the carrier.
From there you can use various methods to read the data, such as:
Digital storage scope.
Logic analyser (such as this: https://www.banggood.com/LHT00SU1-V...C-SPI-CAN-Uart-p-988565.html?cur_warehouse=CN)
Input on sound card, and audio recording software (such as Audacity).
Write a microcontroller program to read and analyse it.
Write a PC program to read/analyse it.
Historically I used an old DOS laptop to do it, and wrote a Turbo Pascal program to sample it via the parallel port. More recently, I've used the Logic Analyser function of a PicKit2 - which while limited in memory has enough to do what's needed.
Hi Mr Al,
I found that Googleing "ge air conditioner remote control code" gave a large number of hits. There were links to reverse engineering the codes and cheap remotes on amazon, On ebay searching for "GE aircon remote" gave sellers with universal aircon remotes at prices that make it not worthwhile building one.
Les.
I have not done much TX Ir , but making a mcu that learned Ir codes should be straight forward.
https://www.electro-tech-online.com/articles/ir-remote-as-mcu-input.736/
The Arduino makes a somewhat decent logic analyzer too if it is programmed correctly.
I know what you mean about the ready made receivers, good idea, and i have a few around but not sure if i have a 40kHz model or not. I am pretty sure i have 38kHz and 44kHz models. That would make a more permanent receiver. Doing this however means it would be dedicated to that one remote due to the carrier frequency, unless i had several devices with the same carrier. I know i have devices with 38khHz and 56kHz already, and this one looks like 40kHz.
I'll take a look at that logic analyzer on BG site, or maybe consider making a permanent one from a Nano.
An Arduino is obviously perfectly fine, and I'm pretty sure you could simply download a sketch to do exactly what you want, and of course there are IR libraries available.
It really seems to make little or no difference, I've never found an IR Receiver that didn't work with any remote I've tried, and I usually aim for 38KHz in any transmitters I build.
The receivers aren't sharply tuned to their specified frequencies, nor do they have accurately tuned PLL detectors.
I ordered one, although I've not had need (or time) to play with it yet. I'm busy today working on my wireless temperature/humidity project, I've got one remote sensor fitted in a box now, and most of a second one built - my current plans are for four channels and sensors.
The wireless temperature monitor sounds interesting too, i wouldnt mind hearing more about that, like what are you using for the transmitters, and how good do the transmitters work?
I'm using HC12 modules, they are extremely easy to use, and give up to 1000m range in open air
They aren't full duplex, but they don't need to be - and doing so would make the modules a LOT more complicated and expensive, and probably cripple the range as well.
Hi again,
Sounds reasonable. Have you actually tried them yet to see how well they communicate at say medium distances?
IR remotes use various different coding schemes (SIRC's, RC5, NEC etc.) and also use specific device and instruction coding, so you need one that matches on all three requirements - but a TV remote should NEVER work an air-con unit.
Why not?
A programmable TV remote should be able to learn any code.
And conversely, an air conditioning remote receiver could be built to use any code you want.