'Touch sensor' could be a condensation detector - I've seen similar things in old VCR's. Won't let the thing fire up if it has been brought in from a cold place and got condensation inside. Just a thought.
Refering to 05:10 -- As I worked as a PCB designer we had used the PCB itself to act as a RF shield for the underneath circuits. I used to have some ground planes within the PCB-layers to prevent RF electric fields gone straight through the PCB without beeing damped. But this do not work very well with magnetic fields. So one have to use other mechanical solutions go shield them (MuMetal works good but it´s not easy to deal with and it´s expensive as well)
6:22 the cable management is fantastic. Even though this thing is never ever going to be repaired (at most, whole board replacement), I admire their dedication to making it easy to open
Congratulations! Amazing video! Really nice to have access to an equipment like this. It is possible to feel how much you love electronics. You are an inspiration to me.
I'm glad I stumbled upon this channel. I calibrate electronics for the AF and I use a lot of the equipment you use in these videos. It's awesome to learn more about it, you are very knowledgeable. I've only been doing my job for about 1.5 years there is still so much to learn though... hope to be as knowledgeable of my job someday as you are.
yay, time for a long video again finally. I'm not super interested in the tech, I just kinda leave these videos up on my 2nd monitor while I do other stuff, he's like the bob ross of youtube.
47:50 those "360" signal switches in the spectrum analyser front-end appear to say 09E or O9E on them. Doesn't matter much, clearly just boring SPDT RF switches. 59:40 pretty sure it increases, not reduces SFDR. My $0.02 on the "marginal" thermal performance: the ADCs are probably in the double digit W a pop. 2 minutes to critical junction temp with those tiny heatsinks and no forced airflow sounds about right. As for the "last shutdown was due to overtemp" message... what's the alternative? "come back and find your scope shut itself off for no apparent reason"? Otherwise great teardown, can't wait for the review :)
16:45 absolutely amazing... looks like testing and quality control with the needs of the technician on a time budget were addressed as the end user won't be operating that switch. I just love a GOOD mystery! How cool... maybe it's a new form of advanced logic acupuncture using DNA/RNA phase timing loops and patterns where you just put your thumb on it and wait as preprogramed needle points preset using the test leads take effect. You'll probably have to update the firmware first... and that will cost a little extra.
EEVblog I don't see why not, if it is AC impedance sensing rather than DC. DC on an exposed pad would only tend to lead to a buildup of fluffy crud in a humid environment.
It seems pretty good for the price. The crippled spectral bandwidth is a bit of a shame since unlike time domain, you often want to see higher frequency components to things. The lack of simultaneous time domain and frequency domain display is also troublesome.. I suppose this scope can still do a regular FFT on each channel so that you can get a simultaneous display of both, albeit without the low noise floor of the spectral analyzer path? I was considering this scope but hmm not so sure. The MDO4000B seems like a better long-term investment. Looking forward to the review, thanks Dave!
rohde und schwarz once told me they have thermal shutdown and limited storage/operation range in some of their products because all the stuff that is calibrated suffers irreversable changes when heated too much. Maybe thats the same here
17:00 looks like a water detector sensor, can you tell us about that? I'm planning to create a circuit to close a hydraulically operated glass floor hatch automatically in the event of rain - I ran into a video showing such a sensor, except they were 2x larger and rectangular and surprisingly reliable. I'm considering an array of these sensors to increase the detection probability yet am concerned about outside exposure so I'll have to sacrifice a small part of the opened doors aperture to mount the circuit case. I thoroughly enjoy exploring electronic circuits on a scholarly level here with you. As a child I used to peek into the back of old televisions looking for "LITTLE PEOPLE" living in the TV instead I was awestruck by the machinations of electronic architecture. While I dedicated my life to another field your dedicated genuine effort in this field is an insightful and interesting approch.
Could that squiggly pad thing be either a test point to test the capacitance of the board or some sort of compensation device that measures the capacitance change of the board due to age,dust or heat ??
Hey Dave, i assume your Heat issue with the opened unit occured due to the fact that those little Heatsinks have a very low thermal mass causing the tempreature to reach its constant level very fast. Also the thermal resistance to ambient is many times higher with the fan not blowing straight on it. I finally assume the constant temperature of probably about 90°C with the fan blowing on it to rise by at least 5 times to something unreachable like 450°C, so if you now take a look at the thermal resistance and the thermal capacitance you get something like a RC-network in electronics where the rise can be assumed as e^x and therefore to complete my assumtion to let the temperature plausibly rise that far from ambient to the thershold within even less than a minute BTW: great BOM-calculation at the end of your video I was very surprised, that such a spectrum analyser frontend would only add 50$ to the BOM... greetings from Germany, Mäander
48:54 "You can see all the via stitching, beautiful low impedance." I imagine it's also helpful for getting a good contact to the milled aluminium can.
Sorry for necro-bumping the thread. Any idea how to look for the serial console port to see the uboot/linux debug messages for the MDO4000 series? I saw a MAX3221 on the peripheral board, but it just connects to the pin 11 of the VGA port and outputs to the cardedge connector. Thanks!
There's no point in updating the display faster than the eye can notice. So you've got 1/30s to display everything once a signal is captured (at what ever speed).
For all the song and dance Tek were making about this scope, I have to say I am a bit underwhelmed. Maybe the hands-on look will change things. For the huge $$$ they are asking for this, they seem to be cutting some big corners. It is possible that they could get into trouble with UK product description legislation as it isn't really an MDO. Unless they insist the M stands for multiple rather than mixed? It will be especially interesting to see how it compares to a proper spectrum analyser.
It would have been nice to show how to use this oscilloscope. There are a lot people especially students who could appreciate your version of how to use this oscilloscope. This video is geared at people who already have experience and NOT for people who are trying to learn.
thanks for uploading this dave, i enjoyed watching this teardown " tuesday " on a thursday :D! and i cannot wait for your next teardown video, would love to see you teardown an audio amp or maybe some old military comms gear if you could get some.. thanks again :)
Yeah, shot Wednesday morning my time (still Tuesday elsewhere), but had to wait for confirmation from the RF front end designer at Tek to ensure the explanation was correct. Then it was a 15GB render (which failed first go) into a 4GB file and uploading that took forever... so yeah, Friday now my time!
Spectrum analyzer part is "09E", a bias tee. Nearest spec I could find was this site. www.everythingrf.com/products/bias-tees/pulsar-microwave/34-83-bt-09-e
Hi Dave, Which one you better recommend me to buy, the Tektronix MDO300, or Agilent/Keysight DSO3000? I find your video very helpful, but now I am in a crossroad between Tektronix or Keysight...please help
No, I don't have the return it. My review rules are very clear and posted publicly on my blog. It's their risk to sent it to me, regardless of whether or not I get to keep it.
EEVblog Then again, these sorts of gear can't possibly receive a "bad" review. Criticism at most, especially user interface and general software issues. Hardware issues, I highly doubt it
I don't agree with you about the fans and overheating. The device is designed to be operated with the covers on. Putting in heavier heatsinks , would add unneeded extra weight and take up more space add extra cost with no benefit. A conservative shutdown threshold is a good thing rather than letting it bake if someone is operating it with out the covers for some time, Or it fills up with fluff and dust over time LOL.
EEVblog Wow, to think you have the confidence to open one up. If I had me one of those I reckin' I'd kiss it from time to time instead. Love your videos. maybe next time you can blast some Cold Chisel in the background. Again, thanks for posting your videos and sharing your experience and knowledge. Darren Mechanic San Diego
EEVblog oh right, well thanks very much for replying so quick, kind of makes me wish i carried on with my electrical engineering course :(, but sadly i was offered NO apprenticeship at all
+EEVblog And the big draw for the expense can be seen in the price tag of the model here; namely, lower long term costs for the client, i.e. Tek due to guaranteed sales and lowered investment risk for the chip manufacturer.
8:24 they've again put in a pretty shit fan in this.. It's a good brand, but it's a bad design fan. There's only 7 fins on it for moving air, and no air filter to keep the dust out. What is this, 1990? Modern fans have a lot more fins, which means they'll produce less sound at the same air volume movement. I understand that these devices will be used in a mostly dust-free environment, and the noise production isn't so much of a problem in an already quite noisy lab, though the price difference for a manufacturer is absolutely nothing for putting a decent fan in it
Whoops, that price is for the 100MHz MDO3014, not the 1GHz MDO3104 which retails for US$13,900. If by "donated" you mean they gave it to you to keep, it must be nice to get that kind of equipment for free...
I wish I had $13,900 to get one... LOL so to upgrade from the 500meg to the 1gig, they charge you $1k-$5k for one pcb I suppose it's better than the $10k for a software update
You should really learn to group your videos Dave.. you again keep referring to this "review" of this freebie, but the video your linking to is to another channel and a spectrum analyzer:? and a brief search on your channel here for "MDO3000 review" does not give any match? Is it because this review .. was never made or is it moved to another channel or is it locked and only valid for people who pay you on Patreon? And yep not cheap that's for sure.. here an'no 2021 it cost 22,350 USD / 137.000DKK incl. VAT this 1Ghz unit you have there. //dk.rs-online.com/web/p/oscilloskoper/7973312/? You did the exact same on the Siglent 399 scope from 2020.. where you also keep saying it in the teardown video. and referring to your review video... but nothing can be found? wtf? instead of making all these vlogging vids, maybe make these reviews you referring to or link to them in your info when you're referring to them as the source... (just a wild idea) and yes I know it's me, that likely are messing up and my search with MDO3000 review are not correct, as you very clearly say it is there 1:07:44 so would love a link here 7 years later and it would be even better if you could cycle vids, that is in relevance and is mentioned as a sequence?
boring videooooo ..i think most of us want to see pcb design and builds.for example build a simple fan controller that is controlled by temperature. show us you designing it then building it then testing it.then share the pcb gerber files so we can all make one.
'Touch sensor' could be a condensation detector - I've seen similar things in old VCR's. Won't let the thing fire up if it has been brought in from a cold place and got condensation inside. Just a thought.
Refering to 05:10 -- As I worked as a PCB designer we had used the PCB itself to act as a RF shield for the underneath circuits. I used to have some ground planes within the PCB-layers to prevent RF electric fields gone straight through the PCB without beeing damped. But this do not work very well with magnetic fields. So one have to use other mechanical solutions go shield them (MuMetal works good but it´s not easy to deal with and it´s expensive as well)
6:22 the cable management is fantastic. Even though this thing is never ever going to be repaired (at most, whole board replacement), I admire their dedication to making it easy to open
I've repaired two of them, boot loop, made around $7k
I really liked your explanation on the RF magic!
Congratulations! Amazing video!
Really nice to have access to an equipment like this.
It is possible to feel how much you love electronics. You are an inspiration to me.
I'm glad I stumbled upon this channel. I calibrate electronics for the AF and I use a lot of the equipment you use in these videos. It's awesome to learn more about it, you are very knowledgeable.
I've only been doing my job for about 1.5 years there is still so much to learn though... hope to be as knowledgeable of my job someday as you are.
That bodged SMD part is soldered between GND pin of the chip and via going somewhere. Thanks for teardown.
yay, time for a long video again finally. I'm not super interested in the tech, I just kinda leave these videos up on my 2nd monitor while I do other stuff, he's like the bob ross of youtube.
I'm waiting for the complaints about it being too long... 3... 2... 1...
EEVblog Nah, we like all of em. Short AND long. Keep it up!
The chip at 39:29 is a Vishay Siliconix DG411L Precision Monolithic Quad SPST Low-Voltage CMOS Analog Switches.
Nice teardown :)
47:50 those "360" signal switches in the spectrum analyser front-end appear to say 09E or O9E on them. Doesn't matter much, clearly just boring SPDT RF switches.
59:40 pretty sure it increases, not reduces SFDR.
My $0.02 on the "marginal" thermal performance: the ADCs are probably in the double digit W a pop. 2 minutes to critical junction temp with those tiny heatsinks and no forced airflow sounds about right.
As for the "last shutdown was due to overtemp" message... what's the alternative? "come back and find your scope shut itself off for no apparent reason"?
Otherwise great teardown, can't wait for the review :)
I think that the pad at 17:00 is a condensation sensor too (I know someone already said that). Only one way to test it Dave ;)
Nope, I have confirmed it's just a logo done by the PCB designer. Vias go to ground plane.
16:45 absolutely amazing... looks like testing and quality control with the needs of the technician on a time budget were addressed as the end user won't be operating that switch. I just love a GOOD mystery! How cool... maybe it's a new form of advanced logic acupuncture using DNA/RNA phase timing loops and patterns where you just put your thumb on it and wait as preprogramed needle points preset using the test leads take effect. You'll probably have to update the firmware first... and that will cost a little extra.
The "touch sensor" at 17:20 might be a moisture / condensation sensor. They seem increasingly popular in consumer gear now.
With the solder mask still on it?
EEVblog I don't see why not, if it is AC impedance sensing rather than DC. DC on an exposed pad would only tend to lead to a buildup of fluffy crud in a humid environment.
Confirmed: not a sensor at all, just a logo.
I think your best one: Great quality video, audio and photos. Great content and a butt-load of links. Cheers, Mark
Thanks, glad you liked it.
It seems pretty good for the price. The crippled spectral bandwidth is a bit of a shame since unlike time domain, you often want to see higher frequency components to things. The lack of simultaneous time domain and frequency domain display is also troublesome.. I suppose this scope can still do a regular FFT on each channel so that you can get a simultaneous display of both, albeit without the low noise floor of the spectral analyzer path? I was considering this scope but hmm not so sure. The MDO4000B seems like a better long-term investment. Looking forward to the review, thanks Dave!
Could those RF switches at 48:28 be 09E not 360
So that's where my boombox from the 80s went too.. someone made it into an Osciliscope!
0:47 and... smells like portable tv receiver ;-)
Looks like a Rakon oscillator there at Y702. I've seen that interesting sort of hybrid oscillator package for some nice TCXOs before.
Anyone else notice that little piece of solder at 1:09:17 near J403
Hopefully that doesn't short something!
The Hittite datasheet at 0:45:44 lists "WiBro" as a typical application. Sounds like some sort of guy-to-guy networking system...
rohde und schwarz once told me they have thermal shutdown and limited storage/operation range in some of their products because all the stuff that is calibrated suffers irreversable changes when heated too much. Maybe thats the same here
17:00 looks like a water detector sensor, can you tell us about that? I'm planning to create a circuit to close a hydraulically operated glass floor hatch automatically in the event of rain - I ran into a video showing such a sensor, except they were 2x larger and rectangular and surprisingly reliable. I'm considering an array of these sensors to increase the detection probability yet am concerned about outside exposure so I'll have to sacrifice a small part of the opened doors aperture to mount the circuit case. I thoroughly enjoy exploring electronic circuits on a scholarly level here with you. As a child I used to peek into the back of old televisions looking for "LITTLE PEOPLE" living in the TV instead I was awestruck by the machinations of electronic architecture. While I dedicated my life to another field your dedicated genuine effort in this field is an insightful and interesting approch.
Nope, I have confirmed it's just a logo done by the PCB designer. Vias go to ground plane. Not a sensor of any sort.
Could that squiggly pad thing be either a test point to test the capacitance of the board or some sort of compensation device that measures the capacitance change of the board due to age,dust or heat ??
That's gnarly boom box dude!
Yes, all scopes should come with a big arse speaker and MP3 playback and standard. With real-time audio spectrum display.
Hey Dave,
i assume your Heat issue with the opened unit occured due to the fact that those little Heatsinks have a very low thermal mass causing the tempreature to reach its constant level very fast.
Also the thermal resistance to ambient is many times higher with the fan not blowing straight on it.
I finally assume the constant temperature of probably about 90°C with the fan blowing on it to rise by at least 5 times to something unreachable like 450°C, so if you now take a look at the thermal resistance and the thermal capacitance you get something like a RC-network in electronics where the rise can be assumed as e^x and therefore to complete my assumtion to let the temperature plausibly rise that far from ambient to the thershold within even less than a minute
BTW: great BOM-calculation at the end of your video I was very surprised, that such a spectrum analyser frontend would only add 50$ to the BOM...
greetings from Germany,
Mäander
Why are there so many bubbles on the traces? 45:40 If anyone can tell me what those are called or what they are there for I'd greatly appreciate it.
I'm guessing it's something to do with controlling the impedance?
48:54 "You can see all the via stitching, beautiful low impedance."
I imagine it's also helpful for getting a good contact to the milled aluminium can.
ahh there it is, thank you very much!
when we can expect review ?
FINALLY!! An unboxing video I can sink my teeth into. I just added you to my Subscriptions.
Good teardown, Dave. Bit of a bummer that its not really a MDO.
4:04 ah god damnit dave, the thing is leaning on its knobs.. put some soft matting under it
Way more than what I need, but thanks for the tear down
Great vid. Love the long form vids!
Sorry for necro-bumping the thread. Any idea how to look for the serial console port to see the uboot/linux debug messages for the MDO4000 series? I saw a MAX3221 on the peripheral board, but it just connects to the pin 11 of the VGA port and outputs to the cardedge connector. Thanks!
There's no point in updating the display faster than the eye can notice. So you've got 1/30s to display everything once a signal is captured (at what ever speed).
20:16 CPU power on.off ...?
So where do I plug in my 8 track cartridge?
I still prefer the monster size units. Gonna miss those days
For all the song and dance Tek were making about this scope, I have to say I am a bit underwhelmed. Maybe the hands-on look will change things. For the huge $$$ they are asking for this, they seem to be cutting some big corners. It is possible that they could get into trouble with UK product description legislation as it isn't really an MDO. Unless they insist the M stands for multiple rather than mixed? It will be especially interesting to see how it compares to a proper spectrum analyser.
Great vid as usual Dave. TFS
47:50 Sure it is 360 and not 09E? :D
It would have been nice to show how to use this oscilloscope. There are a lot people especially students who could appreciate your version of how to use this oscilloscope. This video is geared at people who already have experience and NOT for people who are trying to learn.
I was hoping you would touch that touch sensor when it was running, haha.
The oscar Correct video. Look at the connector on the back and small touches, Lets make it nice and neat.
thanks for uploading this dave, i enjoyed watching this teardown " tuesday " on a thursday :D! and i cannot wait for your next teardown video, would love to see you teardown an audio amp or maybe some old military comms gear if you could get some..
thanks again :)
Yeah, shot Wednesday morning my time (still Tuesday elsewhere), but had to wait for confirmation from the RF front end designer at Tek to ensure the explanation was correct. Then it was a 15GB render (which failed first go) into a 4GB file and uploading that took forever... so yeah, Friday now my time!
Another great tear-down vid. Dave, your bench is getting messy, again. :)
nice scope
Spectrum analyzer part is "09E", a bias tee. Nearest spec I could find was this site.
www.everythingrf.com/products/bias-tees/pulsar-microwave/34-83-bt-09-e
Thank you for an interesting video, man! Very informative.
Hi Dave,
Which one you better recommend me to buy, the Tektronix MDO300, or Agilent/Keysight DSO3000?
I find your video very helpful, but now I am in a crossroad between Tektronix or Keysight...please help
They donated it?
As it turns out, you like the scope, but if you gave a bad review, would you have to return it?
That's confidence on their part.
No, I don't have the return it. My review rules are very clear and posted publicly on my blog. It's their risk to sent it to me, regardless of whether or not I get to keep it.
EEVblog Then again, these sorts of gear can't possibly receive a "bad" review. Criticism at most, especially user interface and general software issues. Hardware issues, I highly doubt it
He got sooo much knowledge
I don't agree with you about the fans and overheating. The device is designed to be operated with the covers on. Putting in heavier heatsinks , would add unneeded extra weight and take up more space add extra cost with no benefit. A conservative shutdown threshold is a good thing rather than letting it bake if someone is operating it with out the covers for some time, Or it fills up with fluff and dust over time LOL.
Dave, have you tried out a Rohde and Shwartz MSO? They appear to be like the Rolls Royce of scopes. Maybe it's just the price that gives me that idea.
Haven't taken one apart, no, but yes, I expect top quality.
EEVblog Wow, to think you have the confidence to open one up. If I had me one of those I reckin' I'd kiss it from time to time instead. Love your videos. maybe next time you can blast some Cold Chisel in the background. Again, thanks for posting your videos and sharing your experience and knowledge.
Darren
Mechanic
San Diego
Was this tear down using the new Tagarno microscope/camera? Video looked really great!
Nope, just my regular camera, having major issues with the Tagarno
But does this thing acually work? Can you corrollate time domain and frequency domain measurements like on the 4000? How's the DVM?
I explained that, no you can't.
That fan is a single failure point of the scope, that's crazy.
Well, to be fair, almost anything in there is a single point failure.
whats an asic ? ( if thats what you are saying ? )
Application Specific IC - a custom designed chip. They are very expensive to design, only the big companies do it.
EEVblog oh right, well thanks very much for replying so quick, kind of makes me wish i carried on with my electrical engineering course :(, but sadly i was offered NO apprenticeship at all
EEVblog
true!
+EEVblog And the big draw for the expense can be seen in the price tag of the model here; namely, lower long term costs for the client, i.e. Tek due to guaranteed sales and lowered investment risk for the chip manufacturer.
Great video!
Always wondering what your insurance contributes to on a monthly base ;)
Currently uninsured for contents!
С моей пенсией 10 лет на такой осциллограф копить нужно )))
да, $13,900 не дешево!
Nice going Dave. You just voided the calibration. Will you get the scope recalibrated before using it for real measurements?
Of course not, there is nothing wrong with it. Taking it apart didn't change a thing.
@1:08:32 BTTF heatsink ;)
First first comment in my life. How long do these things normally take to encode? Seeing black.
Finally I have been waiting the whole day for this teardown porn
8:24 they've again put in a pretty shit fan in this.. It's a good brand, but it's a bad design fan. There's only 7 fins on it for moving air, and no air filter to keep the dust out. What is this, 1990? Modern fans have a lot more fins, which means they'll produce less sound at the same air volume movement. I understand that these devices will be used in a mostly dust-free environment, and the noise production isn't so much of a problem in an already quite noisy lab, though the price difference for a manufacturer is absolutely nothing for putting a decent fan in it
No metal shield for the smps !
Price?
Very cool technology. But the prices, yikes.
50Hz in the ol' Dart too
Only US$3,990 retail, less that I thought it would be.
Whoops, that price is for the 100MHz MDO3014, not the 1GHz MDO3104 which retails for US$13,900. If by "donated" you mean they gave it to you to keep, it must be nice to get that kind of equipment for free...
Winston Smith Yeah, it's nice, but meh, it's just another scope in the lab. You can only use one at a time...
EEVblog How about a donation to a poor African, a humble 20MHz would bring me immense joy. lol just kidding love your videos.
I wish I had $13,900 to get one...
LOL so to upgrade from the 500meg to the 1gig, they charge you $1k-$5k for one pcb
I suppose it's better than the $10k for a software update
What a bummer, No HDMI :)
Teardown Wednesday? :p
Nice video but almost $14,000. Even the 100 MHz one is $3350 (two analog channels)
Yes, basically same price as the Agilent 3000X.
I like these videos. Thumbs up.
It's Thursday not Tuesday. :)
probably took that long to render given the length of the vid :)
watched the whole thing
First thing I noticed: Your desk is pretty empty :P
Dear, EEVblog evry it is nice videos.
Thiết kế nguồn xung trên bo mạch chính rất nguy hiểm!
Khi nguồn xung có sự cố sẽ gây cháy nổ bo mạch chủ....???? tôi không đánh giá cao thiết kế này!
$13,900 for the 1Ghz scope.
You should really learn to group your videos Dave.. you again keep referring to this "review" of this freebie, but the video your linking to is to another channel and a spectrum analyzer:?
and a brief search on your channel here for "MDO3000 review" does not give any match?
Is it because this review .. was never made or is it moved to another channel or is it locked and only valid for people who pay you on Patreon?
And yep not cheap that's for sure.. here an'no 2021 it cost 22,350 USD / 137.000DKK incl. VAT this 1Ghz unit you have there.
//dk.rs-online.com/web/p/oscilloskoper/7973312/?
You did the exact same on the Siglent 399 scope from 2020.. where you also keep saying it in the teardown video. and referring to your review video... but nothing can be found?
wtf? instead of making all these vlogging vids, maybe make these reviews you referring to or link to them in your info when you're referring to them as the source... (just a wild idea)
and yes I know it's me, that likely are messing up and my search with MDO3000 review are not correct, as you very clearly say it is there 1:07:44 so would love a link here 7 years later and it would be even better if you could cycle vids, that is in relevance and is mentioned as a sequence?
It's not Tuesday …
Never heard of pecle, first time I hear it it's repeated dozen of times xD
dude it costs 14K, why bother with a screwdriver )
dummy piece.
Er'm 42?
Fir- oh fuck.
If it's so bloody cheap to produce, then why such a high price? Greedy?
as much as I would like to watch this video its way too long at an hour and 14min.
Save it for later, watch part, etc.. This is what I did for the Q&A video, also I was playing some video games during that one haha..
I watch these kind of videos while tinkering with electronics.
Vasile Ceteras
*this kind
бла-бла-бла
Made in China.
boring videooooo ..i think most of us want to see pcb design and builds.for example build a simple fan controller that is controlled by temperature. show us you designing it then building it then testing it.then share the pcb gerber files so we can all make one.