Identifying Infared LEDs
in [Basics]
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From: amdx on 11 Dec 2009 12:39 "Uriah" <uriahsky(a)hotmail.com> wrote in message news:5b61e92b-811f-42c9-a01b-0d630967607c(a)v15g2000prn.googlegroups.com... On Dec 9, 4:20 am, "amdx" <a...(a)knology.net> wrote: > "Uriah" <uriah...(a)hotmail.com> wrote in message > > news:acb93dd8-3258-4ed5-b35d-e3b3937a3e36(a)f18g2000prf.googlegroups.com...>I > have a Infrared LED transmitter and receiver that is part of a > > redemption game and I need to get some new ones. The distributor wants > > $100.00 for a pair of them. Of course the distributor or the > > manufacture won't tell me anything about them and there are no docs or > > specs or anything to help me in trying to find them from Mouser or > > Digi-key. Is there an easy way to figure out what they are so that I > > can pick them up for probably under $5.00 from anyone but the > > distributor? I am hoping for some cheap test gear that tells you the > > wave length and what ever else I need to know. > > Thanks > > Russ > > I had an ice machine that used an Infrared LED transmitter and receiver. > When > the leads corrodide off of one of them, I found it cost $105 plus shipping > to > get the new assembly. I went to Radio Shack and bought their infrared > transmitter > and receiver pair, and installed them. It worked fine. > What is a redemtion game and how is the Infrared LED transmitter and > receiver used? > Mike It is one of those games you played as a kid and got tickets from it. Like Skee Ball, etc. Like at a Chuckie Cheese. All these do is determine position but I tried some other ones and I couldn't get it to work. If I remember right I measured 5 volts at the receiver and it dropped below 1 volt when the transmitter made contact. Perhaps I just need a pair that operates like that, but what do I look for? What spec is that? The game is a long way off so I have a hard time experimenting. . I run across these all of the time and was hoping for some test instrument that would help, but I guess they don't have one for what I am looking for. I did buy all of the radio shack IR LED's along with many others but it is hard to match them up. Thanks Russ I think what you said is, with the signal from the LED transmitter blocked from the receiver, the output voltage is 5 volts. When you allow the transmitter signal (light) to hit the receiver the output goes down to 1 volt. That seems normal to me, you might be able to get an output voltage a little lower than 1 volt with better aim but, 1 volt would work in most circuits. As someone else pointed out Radio Shack sells the IR devices in matched pairs. Mike
From: Lee on 14 Dec 2009 05:10 On Dec 9, 1:29 am, Uriah <uriah...(a)hotmail.com> wrote: > I have a Infrared LED transmitter and receiver that is part of a > redemption game and I need to get some new ones. The distributor wants > $100.00 for a pair of them. Of course the distributor or the > manufacture won't tell me anything about them and there are no docs or > specs or anything to help me in trying to find them from Mouser or > Digi-key. Is there an easy way to figure out what they are so that I > can pick them up for probably under $5.00 from anyone but the > distributor? I am hoping for some cheap test gear that tells you the > wave length and what ever else I need to know. > Thanks > Russ If they are still working you can view them through any home video camera setup and use that to gauge the brightness/suitability of a possible replacement set? My camcorder almost lets me count the pulses coming out of the TV remote.
From: MikeD on 15 Dec 2009 15:18
On 14 Dec 2009 04:10 AM, Lee <melee5(a)my-deja.com> wrote: [ snip ] > If they are still working you can view them through any home video > camera setup and use that to gauge the brightness/suitability of a > possible replacement set? My camcorder almost lets me count the > pulses coming out of the TV remote. What type of camera do you have? Most video cameras are going to operate in the 30-60 Hz range, far away from allowing you to see a 36Khz signal. Though I may not understand the application you're talking about being able to count. MikeD |