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Idea: cheap multichannel remote control system using IC 555 (transmitter), 2917 and 3914 (receiver). Is this feasible? Answered

Can we make a cheap multichannel remote control system using IC 555 as frequency generator for transmitter (with several buttons connected to different resistors to yield different frequencies to blink the IR led), and as the receiver we use IC 2917 to convert freq to voltage and feed it to IC 3914 as the channel selector? The 3914 datasheet tells that it has 'dot mode' beside the bar mode. Do you think it's feasible? Care to help with the schematic diagram?  Thanks a lot.

P.S. This vague idea is inspired by the Led tachometer instructable found in here.


What sort of range do you need/expect?

What sort of environment will your system be in

How reliable do you need it to be?

Easiest way to get IR control working is to use a micro controller designed to do the task.

page 110 software example and circuit. Cost less than $5

short range, about 5 or 6 m. indoor. microcontroller is kinda hard to find in my place (small town in Indonesia), perhaps i should consider buying it online then, but i hope the shipment fee will be affordable as well. Thanks for replying :)

Buy on line - You must be able to get post. You can buy from the USA

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7 years ago

It's a bit more complicated than that. There's a lot of IR zipping around even in darkness, so chances are your receiver would get terribly confused. You need a carrier frequency which the transmitter and receiver both operate at, upon which your data can hitch a ride. Do a google search for the specifics on how an infrared remote control work, to get the specifics.

You can do it with a microcontroller, and there are ICs designed for the job. Here's who makes them:


And here's where to get them inexpensively:


Thanks for your answer jeff-o. I think i understand your point. Another question to follow this up, if there are too much IR noises, what do you think if i switch the medium to fm? So the frequency is to be fed on an fm transmitter (wireless mic) and i use an fm radio connected to the mentioned receiver?

I appreciate you giving the links, i am gonna read them right away to appease my curiosity, hehe...

Well, in that case you'd need to find a quiet place on the FM dial, and set both the transmitter and receiver to that frequency. On the transmitter end, each button would cause a different frequency "beep" to be produced and transmitted. On the receiving end, you'd need a series of bandpass filters set up, one filter per frequency. And, at the output of each filter, a comparator of some sort to detect whether there is a signal being transmitted at that frequency or not.

Hmmm, the good thing about this setup is that you could transmit one or many button pushes at once, and it would work between walls...