IR Remote control with 555

Distance will be quite low cuz you not even drive the LED at its nominal current. The trick is to highly overdrive its current by a factor of 100! But only in very short pulses and pulse packets to not overheat the LED

I think perhaps that some early TVs with IR remotes had different frequency recievers placed around the TV perimeter before the idea of modulating one carrier with pulse streams to change channels, as well as the more power for distance aspect. Would a demodulator at the Arduino then be necessary to interpret your pulse pattern?

Спасибо. Схема пригодится!

@hurz I know that, thanks for the advice though ;) this is just a prototype, the project later will have all the right properties. I might try to overdrive it, but maybe it will work fine if I use narrow beamed LEDs :P

@2ctiby, so many half knowledge and guesses and just one question mark! Today IR frequencies are very different, please google. Modulated are all IR remote controls, gooooogle. Demodulator are needed on the receiver side, gooogle or binnng please!

You mis-understood what I said...read it again carefully...I simply stated that many years ago there were simple frequency detectors on the TV sets before the now widespread use of modulation which we all see these days. I then went on to say that a better demodulator will be needed if he is going to follow your advice of using pulses (and yes I know you were making the point of more power given out by small bursts...which incidentally sounds a bit like you). I phrased it politely with a question mark at the end so that it would not appear as a know-all statement. The whole thing seems to have escaped you, and I can understand that with a slight language barrier....but you need to persue an understanding attitude instead of down-putting outbursts.

If i read your comment again its getting more confusing. Lets break it down. " ...before the idea of modulating one carrier... " please explain how this unmodulated information transfer works?

A simple TSOP IR detector can detect IR without needing modern modulation techniques. (I agree that short high power pulses are a good idea, just as pulse lasers have been used whereby due to the pulsing, high power can be used without causing damaging overheating or too much drain). Simple non-complex IR detectors were used in early TV remote development after the 'remote-handheld connected by a cable to the TV'. There were four simple IR detectors placed on the corners of the TV. To change a channel (not more than four available in those days), the remote would be pointed at the required corner IR detector and that would operate a switch to change to that particular channel. Development soon followed whereby just one detector was necessary rather than one for each channel.....the method as we know today where a carrier is modulated with pulses which can be demodulated at the receiver. I was simply stating that historical journey without drawing it out, and then concluding with an inquisitive question about whether a further demodulation program for the Arduino might be necessary here. ......hope that clarifies things.

You have a link to this? As you describe it it must be horrible and extreme error prone. Btw, see the IR as a tera herz carrier and your finger is controlling on/off which is a 100% ASK (Amplitude shift keying)! But all interferer like sun light indoor light bulbs especialy neon once, even light up a cigarette in front of TV might run the TV and you crazy! I guess there is at least a second modulating level for some kHz and at each receiver at least a tank resonator selective amp to separate from unwanted interferer. But maybe thats the reason it wasn't sold more then 10 times ;-) again i would like to see a link. Thanx

https://en.m.wikipedia.org/wiki/Zenith_Flash-matic

So this proves why i never heard about this first 1955 invention / it was a total flop! "... The system responded to full-spectrum light so could be activated or interfered with by other light sources including indoor light bulbs and the sun. Despite these defects, the Flash-matic was remained in high demand. In September 1955, Zenith released an apology for its inability to meet the high demand of consumers. The Flash-matic was quickly replaced by new control systems. The "Zenith Space Command" remote control went into production in 1956 with aims to improve upon the Flash-matic's design..."

And the followup successful product 1956 works with ultrasonic and not IR. But it was from my experiences better but also not very robust, cuz a single tone (ask modulated by your finger) could also be little door keys you bell. Anyway it was more robust so i also had one of these toys decades ago. But this 1955 four eye IR thing you can totaly forget MEGAFLOP

Yes, but the main point here is that you were wrongly disparaging about my reples. You should acknowledge that instead of skirting round it. I'll make it easy for you......if you can bring yourself to admit that you were wrong for once, then I will let you and all the others in the community call me '2cent' (a phrase which you invented in an earlier outburst). I will take it as a term of endearment and it will keep me in my place. .....fun on EC !

Your are a waste of time. I tried to break down your wrong statements and proofed your bla bla as unscientific half knowledge and sure you still cant except that. I really spend to much time to read what i already know with some fundamental knowledge. Instead you google nonsense, read in future some books. Or at least read the full article and not just the headline. Your half knowledge you presented here in a fraud-sound is really annoying. Your are even less then 2cent in value for this community. Go and play with Max doctor and patient or teacher and student. And switch the rule who's the teacher like little kids do. You are not interested in learning electronic. You "know" already everything like Max. What ever your area is in which you have probably good experience (i hope you have) you missed to bring this into this community to multiply it with electronic know how. You gained my 2cent respect not more!

So, after a few arguments and the discussion how this worked 100 years ago, does my idea work? xD

This thread is unfortunately poisoned by a troll, so i make it short. Timo, i dont see an improvement of output power or overdrive. The frequency of todays IRs is mostly around 40kHz some are on 400kHz. Yours is in the range of Hz. And finally beside a good knowledge in programming from the target modulated 1's and 0's pakets you need e.g. the reset pin off 555 to start and stop it by SW e.g. Arduino. You see there is a lot missing. Hope this helps a little.

@hurz This is just an example sketch, the actual version will work in the kilohertz range, this is just for simplicity ;)

WTF, keeps you away to use EC in a kHz range and argue "its just a sketch" what is this for? Simulation is always to try to come as close as possible to the reality!!!! And you tell me its just a painting and the rest will follow. Thats exactly the same excuses this 2cent idiot had (ok he is even an fraud) i guess you are not. But hell try to bring electronic and not just a drawing. Keep it up.

I can just change the cap to 20nf or so and it's done, the thing is just that my phone starts lagging like crazy then, thus I use Hertz frequencies

I can imagine this effect. This is in case you subsample a simulation. But this will happen at any frequency. So my tip, set first the simspeed, dial e.g. to 10us/s then stop sim at set cap in nF range. Then start sim again without subsampling. So try to keep always a wide long rectangle high and low to not run into subsampling. Hope this helps.

So läuft es auf jedem Handy, bitte keine Ausreden http://everycircuit.com/circuit/6479288203739136