IS THERE WAY TO CHECK INFRA RED LED IN REMOTE TV IS GOOD OR

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Keith LeBaron
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Checking out IRLEDs

Post by Keith LeBaron » Tue Oct 24, 2006 9:55 am

philba wrote:You guys make me laugh. just get any digital camera and look at the IR LED through it. or a camcorder. or a cam phone.
I like your response. I've learned from it. It works great and is very simple. It's all in knowing where to hit the hammer! :smile:

Keith
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Dean Huster
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Post by Dean Huster » Thu Nov 02, 2006 4:34 pm

I prefer to hack a VCR for the little black box, add in a 5 volt signal, and all IR goes high on the out put signal. Much simpler than even the transistor circuits.
Of course, although very easy to do, it does limit your detector to the 40KHz modulation theme of an IR remote and won't be able to check the operation of a simple IRLED operating in any other condition.

Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).

R.I.P.

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Chris Smith
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Post by Chris Smith » Thu Nov 02, 2006 5:35 pm

With a black box you can modify it to see all IR, not just the 40 khz.

Thats what teckies are all about.

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Post by ku7485 » Thu Nov 02, 2006 8:00 pm

Chris Smith wrote:I prefer to hack a VCR for the little black box, add in a 5 volt signal, and all IR goes high on the out put signal. Much simpler than even the transistor circuits.
Unscrewing the cover and hacking it, then looking for the black box, adding a 5 volt signal, then having to put back the cover... :shock:

This is simpler than my simple circuit loop that uses only a phototransistor, an LED, a resistor and a power supply?

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Chris Smith
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Post by Chris Smith » Fri Nov 03, 2006 8:09 am

The one I made decades ago will pick up a led signal at over a half mile away. Pulsed or straight.

Try that?

The transistor version I build back in the 80s took me several cascade transistors, photo receptor, black box for light, etc, and wasn’t as easy as you describe to make, but it did have 132 million to one gain.

Even the partial moon had to be filtered out.

Id stick with the black box idea, that and a POT for gain.

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philba
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Post by philba » Fri Nov 03, 2006 3:04 pm

so, would every one without access to a camera, camcorder, phone cam or web cam, please raise their hand?

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Chris Smith
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Post by Chris Smith » Fri Nov 03, 2006 4:01 pm

Many students here moan about spending 20 bucks on a project. Im sure there are plenty more. A Camera is not for every one. Used parts from the old is the way to start.

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philba
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Post by philba » Fri Nov 03, 2006 4:11 pm

so you do or don't have a cam? they may bitch about $20 but they get their cell phones paid for some how...

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haklesup
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Post by haklesup » Fri Nov 03, 2006 5:16 pm

I tried it on my cell phone and it worked like a charm. If I didn't have a camera phone, I have at least 5 friends who do for a quick check of a remote (not to mention old phones without service which can be found for free if you ask around). With a camera, there is little to no chance of misinterpreting a signal from an extranious source too. You can almost make out the flicker from the modulation but it wouldn't be very diagnostic IMO other than indicating it is lit. Unlike a circuit I might build, I carry this detector with me everywhere.

You'll never convince you know who that a ubiquitous camera is at least if not more convenient than building a circuit of any complexity. On the other hand, the OP did ask for a circuit and that's what we gave him.

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Chris Smith
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Post by Chris Smith » Fri Nov 03, 2006 5:42 pm

I wouldn’t use a cell phone but I do have dozens of Cameras, Night scopes, Infra red readers, cards, and just about every thing else I built over the years and experimented on.

I had a job that could easily pay for it all.

Not all people, especially students, are that rich.

Build lots of toys and get experience along the way, with your own hands and mind.

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philba
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Post by philba » Fri Nov 03, 2006 8:06 pm

I wonder where all those poverty stricken students are. Oh, yeah, they are yacking away on their cell phones, listening to their iPods or fussing with their notebooks. But they have no money for a camera, camphone or webcam. something really must be done. tee hee hee

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Chris Smith
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Post by Chris Smith » Fri Nov 03, 2006 9:01 pm

Must be why I spend my free time and money educating those poor folks,... on their cell phones?

Your ivory tower fell down long ago.

Join the real world, even if there is a smell your not familiar with.

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philba
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Post by philba » Fri Nov 03, 2006 9:32 pm

<sounds of hysterical laughter> oh that's rich. what a cross you bear. I'm sure you have your work cut out in the booming metropolis of Bieber.

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Post by dyarker » Sat Nov 04, 2006 4:06 am

"Must be why I spend my free time and money educating those poor folks,... "

Don't spend your free time, and keep your educating to yourself please
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Post by JPKNHTP » Sat Nov 04, 2006 6:51 am

-JPKNHTP
-God Bless

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