Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
bd139:
Very true.
Some of the stuff we have now is pretty good. That TF930 for example. Really nice piece of engineering. And that got there after 30 years of learning from questionable designs :)
Ergo the amount of leaked batteries I have seen in Thurlby kit over the years which ate the boards. And the iffy as fuck wiring in the early PL supplies.
bitseeker:
Yeah, sometimes you run into well-designed-for-servicing equipment and can really appreciate it. Thing of beauty, etc. :-+
mnementh:
--- Quote from: bitseeker on July 03, 2018, 09:48:28 pm ---That's really neat, mnem! I think I have the electronics from an old floor-standing fan I scrapped some time ago. I believe it was IR controlled. So, I might have a chance of making something similar.
BTW, to do go/no-go checks of IR remotes, I usually use my phone's camera to see if the IR LED blinks.
--- End quote ---
None of the phones I've had in the last couple years will do it. Besides, it's nice to be able to decode and record the pulses. >:D My current phone DOES have an IR emitter and app built-in tho. I like it greatly. ;D
--- Quote from: Specmaster on July 03, 2018, 09:58:05 pm ---
--- Quote from: bd139 on July 03, 2018, 09:51:42 pm ---You can have a load of fun with a photodiode, opamp and a DS1054Z. I built a simple photodiode amp with a LM358 and BPV11. Record the power button waveform and load it into the DDS (DG1022Z) then play it back through a 2n7000 and IR LED pointed at the TV slyly with a simple trigger set up wired to a push button with a pull up.
Kids playing up, first warning, second warning clicked fingers and TV goes off.
They nearly fell off the couch in surprise, especially the one holding the remote control.
iPhone camera is no good for this as it has an IR filter on it.
--- End quote ---
Samsung phones work a treat as an IR detector, I often use mine for that purpose, another score for Android in the TE arena.
Good to see England in the QFs after all this time, let's hope we continue the momentum and bring it home again.
From mobile device so predictive text might have struck again [emoji83]
--- End quote ---
You can record the pulses to a line input on your sound card, and play them back the same way from a IR LED connected to an audio amp from an old desktop speaker. Takes a little fiddling with a 1-10K pot to get unclipped pulses at record & playback, but you can use the same gain control cable for in & out. Very portable on a laptop with one of those cheap USB sound cards so as to not take a chance on frying your built-in sound.
I might have an old SamSuck smartphone in the back of my desk, now that you mention it...
mnem
*Toddling off to ded*
mtdoc:
--- Quote from: bd139 on July 03, 2018, 09:51:42 pm ---iPhone camera is no good for this as it has an IR filter on it.
--- End quote ---
FWIW, the rear facing selfie camera will work - it has no IR filter. At least on the older iPhones, not sure about the newest ones.
--- Quote from: tggzzz ---Or https://www.tvbgone.com
--- End quote ---
TVbgones are great fun. I met the creator, Mitch Altman several years ago on a business trip to San Francisco when I had an evening to kill and went to the Noisebridge Hacker Space. He was doing a soldering class which I signed up for fun and ended up helping teach several of the students. We built TVbgones and I had great fun afterwards walking down Market Street turning off window display TVs. I'm going to have to dig it out and use it on my kids.. >:D
bitseeker:
--- Quote from: mnementh on July 04, 2018, 03:54:15 am ---
--- Quote from: bitseeker on July 03, 2018, 09:48:28 pm ---That's really neat, mnem! I think I have the electronics from an old floor-standing fan I scrapped some time ago. I believe it was IR controlled. So, I might have a chance of making something similar.
BTW, to do go/no-go checks of IR remotes, I usually use my phone's camera to see if the IR LED blinks.
--- End quote ---
None of the phones I've had in the last couple years will do it. Besides, it's nice to be able to decode and record the pulses. >:D My current phone DOES have an IR emitter and app built-in tho. I like it greatly. ;D
--- End quote ---
Yeah, getting the pulses on the scope screen is very cool. It was that screenshot that piqued my interest.
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