Dave, i thoroughly enjoy the mailbag monday and teardowns but is there any chance of doing a fundamental friday in the use or application of reclaimed LCD's. I think quite a few of us could do with an informative primer on the subject. Thumbs up if anyone agrees!
Hi there Mr Jones! I think you just misted some IR transceivers for the extra module on the polycom phones. And if my hunch is correct, that the data is sent through them, you could still use them for some weird control/option panel. Thanks for all the great videos so far, I’m waiting for more in the future! :)
Hi Dave, a bit of a long question here - I've got a project this week with the following brief and wouldn't mind having some input from any of the viewers or yourself: A small company that is using an external switchboard for its phone exchange would like to monitor their employees phone usage. For that purpose you have been hired to setup an apparatus (hardware and software) to be non destructively attached to the phone line that would be able to give as an output the phone number called. The phone used by the company gives a standard dual tone multi-frequency dialling system and the phone line would also carry the internet ADSL and other signals. I have designed the antenna currently to pick up the signal, and the code on matlab on the opposite end to actually decode the number of the phone. The part which i'm having trouble with is the circuit design in the middle, so far i'm thinking some kind of amplifier and a bandpass filter. I'm not too sure what kind of amplifier I would use in this situation however. I hope this reaches you through the new comment system. Regards
Dumpster diving can be fun. LOL. I have found lots of very good electronics to cannibalize for parts. One of my favorite locations is the local dump. One day I was there before the bulldozers and the telephone company was tossing out Nortel rectifiers.
we still use the Cisco ip phones in our school, the big switchboard ones like that are in the office, and they have smaller ones that don't have transfer buttons on them in the class rooms
hi dave....just got the link to the web cam while surfing your posts.i got a chuckle out of it because it looks like my build area ;-) keep up the good work and hi to all from winchester va,usa. =dok=
Actually Polycom is very proud of their products not being prone to amplify a cellphone buzz. I don't know how they achieve this but this might be the reason to have so many filtering caps and a DSP on board.
Careful people the video goes into R rating starting from 7:55. It includes blood images. Thriller, Action. Nice videos. The things you find for free I have to pay for here. The dumpster collectors are very active and organized here in KUWAIT. I have already "TEARED" apart one photocopier still have two on hold.
I've never come across Zebra connectors before. Just spent 20 mins Googling them... very interesting, but can't figure out how they are normally attached/kept in place. Are they just squeezed between PCB and LCD when the case is screwed together? Great video, lots of info packed into that 15 minutes.
Yes just the pressure from the case squeezing the whole assembly together, they can start to cause problems in older units especially if the unit has been serviced a lot and the case screw stand-offs get worn.
Yes, they are contact connectors that need a bit of pressure to work. There are formula for the right amount of pressure for best contact, but most don't bother being that exact.
HI Dave, I know you won't be able to read the comments thanks to bloody Google, however to say that much appreciated that you don't show how you actually unscrew things, unless the system is clever or a detail stands out... Keep them up!
EEVblog Are you talking about your thumb, or the video? (I'll keep my day job.) I miss the whistling whilst disassembling in fast motion, but I can see how it may be good to mix it up a bit.
EEVblog I actually like the parts salvage videos just as much as I like your reverse engineering videos. Salvaging parts is really cool - especially LCD panels. Many applications for just those things.
"yeah, the blood's getting a bit worse" - might want to put something on there rather instantly.. especially when working on devices of unknown origin and cleaning status. Not only is it ugly to look at, an infection there can limit your lab time rather severely..
Dave Hi, just reference the Ignite Sydney 10 video I just watched...Firstly great job, secondly its definately character that builds success and not bigheaded ego. Like your videos alot, keep going and keep the success going....Mate!.
Hey Dave, I've actually repaired a few of the Avaya 4620 IP phones- The fault is almost invariably 100uF and 470uF caps at the lower left of the board. They dry out because the voltage regulator (I think it's an LM317!) next to them gets very hot. The one I just picked up actually has delaminated the board!
Ha, that's funny I had a different electronic device (InFocus LP-340 projector) that had a lone electrolytic cap right next to a Viper100A, that would also inevitably dry the cap out over time. This cap combined with a resistor was directly responsible for setting the oscillation frequency for the Viper (with a lower value increasing the frequency...) I wonder if this is a known trick to make equipment have a limited lifespan (i.e. planned obsolesce)?
I have often wondered that myself. Our organisation has several thousand Avayas of that particular model. Our workshop has repaired maybe 500 so far... Given we were doing them at about $50 a go, against a replacement value of $350...
I also collect usable stuff from old equipment. Strange how you need something you chucked away recently. May i ask what is you feeling about the Rigol multimeter range compare to Fluke and the other good brands. Maybe a tear down or impressions in the future? While i am busy. For many years i have had a switch in my scope's plug to disconnect the mains earth when doing certain measurements. Would you make a short video on why not to do this and all the problems please? I was not very clever? Thank you for all the informative info and i also like the tear downs of old no matter how old equipment.
Hi Dave, around 4:45 you mentioned something that sounds like Zephyr/Zepir strip. Can you tell me what it was? I've seen this thing in an electronic caliper sometimes ago but i dont know what to search for. I just assume its some sort of rubber based flexible printed circuit with exposed contacts on both ends. But since you said its not easy to find, i think it must be something else
Don´t go that road, it´s wasted time, since HD4480 is the industrial standart for simple LCD displays. If you spend just one our for a non standard RevEng, you could by a 5" TFT "ready to go" instead....
6:11 [...] like a 20 line by 4 caracter Display [...] Oh, didn't know they use those phones rotated 90° to the left/right. (I know it's just accidetial speech error)
*yea the bloodz gettin a bit worse, no worries* ...gotta be the most Aussie thing I've heard today and I've been watching lots of explosions and fire lol Edit: also I wonder could you put a little Linux distro on one of these, like DSL or tiny core.
I worked at a factory where they recycle these phones there where sometimes even new phones to be recycled . I took some of them home to tear apart but i diddent keep the parts IDIOT .
Sir, thankyou very much for sharing your knowledge. It came to my realization a very very very longtime ago as to WHY microchips have been used .......in the effluxion of time. Reason(S) revolve around trying to "completely control" the whole "Revenue and financial streams" that manufacturers depend upon to finish a sellable product. Microchips are used "for keeping secret" how their PURPOSE results in a advanced functioning device. That is so that the chips can't be STOLEN (designs) or copied .........it's not known how they work. This results in ........"chip patent owners"..... being able to charge whatever price they want in the supply of tech devices. but liquidation....and bankruptcy across the planet...............who pays sir...? ................O___o............... thanks Vin
Keeps the teardown going even though he's bleeding. What a soldier!
Dave, i thoroughly enjoy the mailbag monday and teardowns but is there any chance of doing a fundamental friday in the use or application of reclaimed LCD's. I think quite a few of us could do with an informative primer on the subject. Thumbs up if anyone agrees!
That's exactly why I went for the i2004, the audio produced by those phones are incredible! :D
Hi there Mr Jones! I think you just misted some IR transceivers for the extra module on the polycom phones. And if my hunch is correct, that the data is sent through them, you could still use them for some weird control/option panel. Thanks for all the great videos so far, I’m waiting for more in the future! :)
Yeah, you are right, totally missed that. Thanks.
Now I want to hear that one speaker playing some music
Thank's for share Dave.
Hi Dave, a bit of a long question here - I've got a project this week with the following brief and wouldn't mind having some input from any of the viewers or yourself:
A small company that is using an external switchboard for its phone exchange would like to monitor their employees phone usage. For that purpose you have been hired to setup an apparatus (hardware and software) to be non destructively attached to the phone line that would be able to give as an output the phone number called. The phone used by the company gives a standard dual tone multi-frequency dialling system and the phone line would also carry the internet ADSL and other signals.
I have designed the antenna currently to pick up the signal, and the code on matlab on the opposite end to actually decode the number of the phone. The part which i'm having trouble with is the circuit design in the middle, so far i'm thinking some kind of amplifier and a bandpass filter. I'm not too sure what kind of amplifier I would use in this situation however. I hope this reaches you through the new comment system.
Regards
Dumpster diving can be fun. LOL. I have found lots of very good electronics to cannibalize for parts. One of my favorite locations is the local dump. One day I was there before the bulldozers and the telephone company was tossing out Nortel rectifiers.
I giggle every time you mention the "EEVblog corporate towers" ;)
Excellent as usual!. Fascinating.
Beauty! im soo jealous...so many LCD's
My first job after leaving university was working for a company installing those Panasonic phones and PABXs.
Thank you so much for the video !!!
"Check it out! Its even free standing. What a bobby dazzler."
I was unable to keep my sides contained.
Haha! Make that last speaker into a mini ported sub for your RC low rider.
Would it be possible to have a video where you show the Franken-projects you make with all the stuff you salvage? :)
I was just about to write about wich types of screws do you salvage (if any), but that "screw cup" moment answered. Funny!
8:30 it's hard messy and bloody work at EEVBlog HQ...
this was surprisingly fun to watch
There are so many memory chips here. Those are almost always standardized parts you can reuse for your own MPU projects.
we still use the Cisco ip phones in our school, the big switchboard ones like that are in the office, and they have smaller ones that don't have transfer buttons on them in the class rooms
1000volts at 16microfarrads? I think you got them mixed up :) By the waythe mic and speaker asembly are so complicated to avoid feedback and echo.
hi dave....just got the link to the web cam while surfing your posts.i got a chuckle out of it because it looks like my build area ;-)
keep up the good work and hi to all from winchester va,usa.
=dok=
Actually Polycom is very proud of their products not being prone to amplify a cellphone buzz. I don't know how they achieve this but this might be the reason to have so many filtering caps and a DSP on board.
Careful people the video goes into R rating starting from 7:55. It includes blood images. Thriller, Action. Nice videos.
The things you find for free I have to pay for here. The dumpster collectors are very active and organized here in KUWAIT. I have already "TEARED" apart one photocopier still have two on hold.
I've never come across Zebra connectors before. Just spent 20 mins Googling them... very interesting, but can't figure out how they are normally attached/kept in place. Are they just squeezed between PCB and LCD when the case is screwed together?
Great video, lots of info packed into that 15 minutes.
Yes just the pressure from the case squeezing the whole assembly together, they can start to cause problems in older units especially if the unit has been serviced a lot and the case screw stand-offs get worn.
Yes, they are contact connectors that need a bit of pressure to work. There are formula for the right amount of pressure for best contact, but most don't bother being that exact.
Could do a simple voice test with that weird mic attachement in soem other video - does it have any noticable difference?
Yes, you can never have enough screws...
HI Dave, I know you won't be able to read the comments thanks to bloody Google, however to say that much appreciated that you don't show how you actually unscrew things, unless the system is clever or a detail stands out... Keep them up!
Yeah, this one was shot really quick. Bang, it's open. More quickly cut than my usual style.
EEVblog
Are you talking about your thumb, or the video? (I'll keep my day job.)
I miss the whistling whilst disassembling in fast motion, but I can see how it may be good to mix it up a bit.
EEVblog I actually like the parts salvage videos just as much as I like your reverse engineering videos. Salvaging parts is really cool - especially LCD panels. Many applications for just those things.
'guild the lily' and 'Bobby Dazzler' are now in the phrasebook!
Nice teardowns
Even though I hate it when people smash electronics, I'd love to smash that Cisco phone. It's what we use where I work, so yeah.....
"yeah, the blood's getting a bit worse" - might want to put something on there rather instantly.. especially when working on devices of unknown origin and cleaning status. Not only is it ugly to look at, an infection there can limit your lab time rather severely..
It's a LCD bonanza! :P The best Telstra phone is one in pieces :)
Dave Hi, just reference the Ignite Sydney 10 video I just watched...Firstly great job, secondly its definately character that builds success and not bigheaded ego. Like your videos alot, keep going and keep the success going....Mate!.
Hey Dave, I've actually repaired a few of the Avaya 4620 IP phones- The fault is almost invariably 100uF and 470uF caps at the lower left of the board. They dry out because the voltage regulator (I think it's an LM317!) next to them gets very hot. The one I just picked up actually has delaminated the board!
Ha, that's funny I had a different electronic device (InFocus LP-340 projector) that had a lone electrolytic cap right next to a Viper100A, that would also inevitably dry the cap out over time. This cap combined with a resistor was directly responsible for setting the oscillation frequency for the Viper (with a lower value increasing the frequency...) I wonder if this is a known trick to make equipment have a limited lifespan (i.e. planned obsolesce)?
I have often wondered that myself. Our organisation has several thousand Avayas of that particular model. Our workshop has repaired maybe 500 so far... Given we were doing them at about $50 a go, against a replacement value of $350...
5:30 hahhaha 1000v 16uf :D
Every HD4480 LCD found inside those is worth the tear down. :)
Lots of reusable SDRAM & Flash, nothing a hot air gun can't remove :)
Cute little speakers.
I've always known Polycom hardware to be extremely robust.
Dave, you can use the power plugs, maybe handy later, and dont take much room in the partsbox :D
I have that exact same cisco one in my university room right now! Serves my computer internet and is used as a room phone powered over ethernet!
I also collect usable stuff from old equipment. Strange how you need something you chucked away recently.
May i ask what is you feeling about the Rigol multimeter range compare to Fluke and the other good brands. Maybe a tear down or impressions in the future?
While i am busy. For many years i have had a switch in my scope's plug to disconnect the mains earth when doing certain measurements. Would you make a short video on why not to do this and all the problems please? I was not very clever?
Thank you for all the informative info and i also like the tear downs of old no matter how old equipment.
11:45 They could have put that connector on the other side and route the board to pass the flex cable on the other side
Didn't think I'd be able to laugh at a video about land-line phones
Dave, he aint got time to bleed
Damn, I soooo missed an opportunity to use that line!
Have a rather more modern version of the Cisco one in my grad school office, has a color LCD. Pretty nuts.
Have you seen the presentation on cisco phone hacking to surreptitiously listen through the speakerphone?
10:23 Dave ! You are excused.
What happened to your massive printer/plotter???
Hi Dave, around 4:45 you mentioned something that sounds like Zephyr/Zepir strip. Can you tell me what it was? I've seen this thing in an electronic caliper sometimes ago but i dont know what to search for. I just assume its some sort of rubber based flexible printed circuit with exposed contacts on both ends. But since you said its not easy to find, i think it must be something else
Zebra. like a striped horse. neighhhh!
how about building a circuit to connect a couple of these phones...
I love to tare shit apart so much, I even like watching!
Makes me wonder how many displays you have in stock :)
Hello Dave any ideas where I would be able to get one of the cisco daughter boards for the power and Ethernet as mine sadly bit the dust thanks sam
Hi Dave,
Will you please upload a video of Radio, Transistor , TV using with an oscilloscope analyser at multi point. thanks in advance
They don't make things nowdays like they used to
funny coincidence: gut means in german "good", don't throw it away, let me disassamble it.
is there a way to reverse engineering a non standard lcd display interface?
Don´t go that road, it´s wasted time, since HD4480 is the industrial standart for simple LCD displays. If you spend just one our for a non standard RevEng, you could by a 5" TFT "ready to go" instead....
6:11 [...] like a 20 line by 4 caracter Display [...]
Oh, didn't know they use those phones rotated 90° to the left/right.
(I know it's just accidetial speech error)
*yea the bloodz gettin a bit worse, no worries* ...gotta be the most Aussie thing I've heard today and I've been watching lots of explosions and fire lol
Edit: also I wonder could you put a little Linux distro on one of these, like DSL or tiny core.
Ahhh, and you could have given the voip stuff to me :p
5:41 Legos!!
Johny Vegas, is that you?
Is it possible to replace EMMC chip is Samsung S3 at home? If so where can I but it?
how can they use 2 wars to provide power and data ?
using some kind of controlled load?
never mind i just saw the ir interface
I worked at a factory where they recycle these phones there where sometimes even new phones to be recycled .
I took some of them home to tear apart but i diddent keep the parts IDIOT .
14:12 CIS-co
"nortel are huge", were, mate, were.
Are you even going to read this?
Do you really keep these parts? Can we see your junk bins?
I like salvage vids !
Bobby dazzler :D
My local dumb doesn't allow me to take stuff :I
Nice Sucker!! :D
phones, really?
Screw this. Literally. With screwdriver. Nice.
Hi, just curious, how much content creator gets per lets say 10000 views from youtube?
Even if he wanted to tell you it's against the terms and conditions of adsense to discuss earnings =(
ok, but I'm asking not only that crazy aussie block, and curious about general number. what nobody else ever wondered about this?
cheers
Toni Axe So until now only Gangnam style guy can retire
lol
Very little actually. One typical video does not even pay for my time to shoot it.
Sir, thankyou very much for sharing your knowledge.
It came to my realization a very very very longtime ago as to WHY microchips have been used .......in the effluxion of time.
Reason(S) revolve around trying to "completely control" the whole "Revenue and financial streams" that manufacturers depend upon to finish a sellable product.
Microchips are used "for keeping secret" how their PURPOSE results in a advanced functioning device.
That is so that the chips can't be STOLEN (designs) or copied .........it's not known how they work.
This results in ........"chip patent owners"..... being able to charge whatever price they want in the supply of tech devices.
but liquidation....and bankruptcy across the planet...............who pays sir...?
................O___o............... thanks
Vin
There will be blood. Bwahaha
Reminds me of the SNL French Chef skit.
www.dailymotion.com/video/x7tnc9_the-french-chef_fun
Hey
:) 1st