Not related to this specific video, but Dave, because of your videos I finally figured out how to use a bipolar transistor after 10 years of frustration. Thank you! Now on to mosfets and the 555!
Hands up those who can clearly see the fan "airflow" arrow at 10:31 (pointing upwards) while Dave blathers on about how badly designed the airflow is... I wish he would check his facts before he belittles the design engineers so much...
haha @EEVblog always goes off the rails right from the start if the UI and things are not exactly like Daves wants it to be, sometimes I wanna hit him in the head with the gear he is reviewing , but that's half the fun =) But I very often feel like he should spend a couple of minutes before pressing record and learn how the damn thing works before he starts sounding like somebody is strangling a cat :D
The antenna on the mains socket is probably the best they could do. A microstrip antenna on the PCB would have a bad ratiation pattern because of the close ground plane. So it's the furthest point from the ground plane. A half wave dipole would be better of course ;)
At 6:53, I bet with a little experimentation, they figured out a way to couple their wifi to the mains cord for better reception. I'm not a radio guy by a long shot, but I've taken apart enough clock radios to know that's how it's done. In general, table top AC powered radios usually have some coupling between the radio antenna circuits and the AC power cord to improve reception and in some cases not need a telescoping antenna.
For observing really low noise signals I use my Tektronix 5103N. It's not digital, it's kind of heavy and it has no real storage capability. But it only cost $20.
dave, just want to say thanks. i have an interest in electronics but never built or acted on it. because of your awesome videos i brought my first soldering iron and an intro to electronics kit today
The back is curved in case it gets pushed up against something, but with no direct air entry/exit points thermal instability could be an issue. Lots of room on the DMM PCB so revisions could be made so this this could stand up to an educational market.
So far I can remember, initial Owon DSOs were really 'not ok' inside, but now they have improved a lot excepting some passive components which could easily be replaced by renowned makes. Considering price points, Owon really a charming performer & surely they will improve more - here I am confident, though I am not much confident about Dave's attitude towards Owon!!
IRQL_NOT_LESS_OR_EQUAL is usually a hardware fault in my experience - not caused by an update. Many, many things to check for, but a common and quick one might be just to reseat the memory. Windows 10 may be extremely annoying with its slow, forced updates, but the update mechanism itself is pretty solid! Also, +1 for the Owon scope. Our shop runs on Owon scopes (the mid-low end ones like the SSO8192) and they're fantastic to use, intuitive and straightforward for folks that aren't hardcore hardware geeks ;) Battery is very useful for isolation, not just travel!
Jeff Metten Uhh yeah, sure. Then what? How do you fix it? Talk bad about Linux's useability, but I've always been able to rescue a linux install by chrooting into it with a live usb stick and fixing what's wrong, I've Never had a successful Windows repair. It always ends up in a complete reinstall. Whereas with linux, you get back up and running.
It's the "normal" product nowadays. By the time the adhesive dries up and the product goes kaput, the warranty is expired and you're supposed to buy a new one. 99% of the products are like that, unfortunately.
Big thumbs up for this teardown. I'm guessing the 5.5V input is to allow for an LDO for clean 5V power. Maybe an ideal diode power priority chip in there somewhere for the battery backup...
nice teardown! i have another simmilar one (XDS series also) i can say that after one hour the case gets quite hot on the edges because of that bad thermal design :(
That sudo IR port at the top right of the screen maybe a con into making you believe there is more functionality to this scope than there really is. I wouldn't fork out this price for what is inside.
I wish you would do the TAO3104a .. it seems to have the same specs as this, only in a tablet form factor. It would be a great candidate for a shakedown. It's quite a bit newer by Owon, and we could see if their layout is any better now, all these years later.
It looks good enough for most ordinary use, the inside looks fine, it consumes bugger all. It won't get hot enough to die fast, the crappy caps won't be doing much. I'm allways supprised how much they can cram into bugger all space :-).
Long time ago, I see, but this scope is still on the shelves. Could you maybe also look into the things as: Interval (△T) Accuracy (full bandwidth): Single: ±(1 interval time + 1ppm x reading + 0.6ns); Average > 16: ±(1 interval time + 1ppm x reading + 0.4ns) and.. Sample Rate / Relay Time Accuracy = ±1ppm ...or maybe somebody else can make a comment on that.
The 10A shunt is adjusted by moving the solder around until the shunt is in calibration - hence the messiness. This is the normal way to adjust wire shunts!
And that's what he meant; Are you blind, can't you see how terrible where they chose to place the fan, one must be blind "like Stevie Wonder" to place the fan squeezed under the board as shown in the video @10:40
Sorry, that text came across all wrong - it was not critique. It should have said "what's going on with the missing R139 & R140 and flux residue". But maybe explore what it might be? Can it be resistors that set the model in software?
Hi! I have some trouble measuring the inductance of a coil in a bipolar stepper motor (20 Ohm resistance). I have used several methods using function generator and oscilloscope. So far, the results are pretty much all over the map. Please discuss this topic (maybe in Fundamentals Friday..?)
who did that stevie wonder!! I'm ROFL Dave.. I think you nailed it all. That is absolutely the worst place to put a Wifi antenna because there is going to be 50/60Hz coupling on to the wifi frontend most likely uckkk, the fan arrangement is hilarious
Lu Tello Making accurate, high speed converters gets exponentially more complex as you add bits. Many oscilloscopes are 8-bit as a result. A 16-bit converter would have to be very slow or extremely expensive.
Lu Tello If it helps clear things up, the "bit" specification refers to the analog to digital convertor (ADC) and not screen colors or anything like that.
techmage89 technically yes, but you have to start looking at noise floor and ENOB at that point, I won't go into it but it becomes the precision vs. accuracy discussion
Since the internal rail is 5.5v I wonder if you can charge the internal battery over the USB device connection? Not enough to supply the 20W it wants to run, but you could totally charge while it's off
Hello Dave. I don't know any other vlog, like this, and probably no other with so much content or subscribers. Good Job! What do think of rate the oscilloscope. Like give a "Gold" or "Silver" award?
Yeah, he totally needs to have an offsite sample of the AI that occasionally chirps out random movie quotes: (Dave is busy tearing into another brand new scope) and then... "what are your doing Dave?" - Eddy
Yes, I saw that too. On the other hand, the cooler has no fins anyway to spread the heat effectively. I do not know how much waste heat is generated by the display or other components on the front, or if the fan is only installed to create any air movement (to pull warm air away from the front). You're absolutely right that this fan is somehow .. misplaced in its place.
how bad was the soldering on the multimeter board and i saw a lot of bad soldering .for the price you would think the QC would be a higher standard .I see alot of potential faults waiting in the wind with that particular scope
I'm totally new to this game, one of the young players who fall for the usual traps. My question is: why would one need 14bit ADCs? Dave said this is a niche product, what are the use case scenarios in which I'd need 14bit precision out in the field?
btw dave how about you make a video about how to identify chips and ICs? like what of the scribbles on them is actually important and where to look them up
Thank you a lot for all you video. Since I started to follow I improved my english and got used to your accent. And of course I learnt a lot of electronic stuff I didn't in college!
now i stevie wonder how the test equipment works for basic troubleshooting? if it works who cares what is under the hood? i just don't know? great video and thanks a lot...:) pricey
Nice video... Helped me with disassembly. Has anyone been able to flash the firmware on this model? Is there any recovery tool that can keep the device powered on when the self test fails and the device shuts down within 10sec. does it turn itself off including the USB connection?
I got the 100MHz 12bit 'little brother model' XDS3102A Plus and I can concur that the XDS3000-series is amazing! Only thing I'm not happy about is the provided probes, they're garbage. And for some reason my scopes device mode USB doesn't work...
I want to build a basic oscilloscope, where should I start? Right now I'm using an old tube TV as a wave visualizer. I've taken a couple circuits courses so I know about op - amps, diodes, mosfets etc but I'm not sure how to combine all of those things to make an oscilloscope.
a CRT television is a basic oscilloscope. you have both the vertical and horizontal drivers and a time base generator in b&w or color TV. however the ' time base ' is the horizontal scan rate of NTSC video. all you need now is an input buffer and a trigger amplifer
If it doesn't weigh 50 lbs and take up significant bench space, it's not a real piece of test equipment... :) Oh, and it should consume kilowatts of power, too.
Hey EEV blog, you did make a remark at ~21 minutes that this scope is not really polished ... Have you a the teardown link/referenceof the most polished scope that you have made ? Thanks !
Hi. I had a pds5022s oscilloscope, every thing is good .but had a bright circle on LCD display center ( 2 inches diameter ) could tell me what the problem of it .Thanks
Hello there! Maybe it's a silly question but it's nevertheless a question I'd like to ask anyway, I have the feeling that when watching these videos I never get to completely grasp the subject. Ofcourse I would really really like it, and your videos are very educational aswell, love them! But I guess I'm feeling overwhelmed by the material. I have a background in Chemistry and I'm currently studying IT (majoring in cybersecurity), so not completely unfamiliar but still. I guess I'd like to ask you,or any of the other fellow commenters and wonderful followers where to start?
I'd love this to be Linux, then it could be hacked about, maybe make it a universal machine, maybe turn it into a very expensive guitar effects unit too.
i'm wondering could u install a ssd drive in an oscilloscope at all to make it a pc i know that is a dumb question but seance the cpu is almost like a pc cpu could you just wondering???
What's a "typical rectifier with stepdown windings plus a buck"? Especially at that power level, you don't expect a whole lot of complexity. It's just your bog-standard off-line flyback converted. That TO-220 package on the primary will be the all-in-one PWM+MOSFET combo (think stuff like the TOPswitch line).
What I meant by "typical rectifier with stepdown windings plus a buck" is an offline converter! I didn't know it had a specific name for that topology. Thank you for commenting, learned something new! And yes, I can see now that discreet parts really wouldn't be necessary.
The pcb material actually has a lower resistance than air, so to increase the dielectric strength between terminals, you put the gap in. If you look closely, you will see several other notches. This actually increases the cost of the board. Routing isn’t free like drilling is . As long as the holes are not too large.
That fan *sucks both ways*. They had plenty of space to put it somewhere else where it would have made a better job. 1500Euros is way too pricey for any hobby application, but I guess it was not made for hobbyists.
what you call weird is an airflow channel, meant to preserve flow when against a wall or set flat on a table.
Who is this guy? What's he on?
Not related to this specific video, but Dave, because of your videos I finally figured out how to use a bipolar transistor after 10 years of frustration. Thank you! Now on to mosfets and the 555!
Re: custom oscillator, I'm willing to bet the parts sourcer found that bodge + Chinese labour to be cheaper than the spec'd part.
Hands up those who can clearly see the fan "airflow" arrow at 10:31 (pointing upwards) while Dave blathers on about how badly designed the airflow is... I wish he would check his facts before he belittles the design engineers so much...
haha @EEVblog always goes off the rails right from the start if the UI and things are not exactly like Daves wants it to be, sometimes I wanna hit him in the head with the gear he is reviewing , but that's half the fun =) But I very often feel like he should spend a couple of minutes before pressing record and learn how the damn thing works before he starts sounding like somebody is strangling a cat :D
5:33 Those aren't no-name! Those are top of the line... sorry, i meant top of the (junk) heap CapXon KM! Ah, there went another typo - C-R-apXon...
The antenna on the mains socket is probably the best they could do. A microstrip antenna on the PCB would have a bad ratiation pattern because of the close ground plane. So it's the furthest point from the ground plane. A half wave dipole would be better of course ;)
Best they could do? Seems to me like the sky's the limit and of course we've seen incredibly clever designs from other manufacturers.
Out of everyone of my TH-cam subscriptions, you update the most frequently, thought you should know that. Love your videos. Thanks.
+Ren Kararou thanks, I try.
At 6:53, I bet with a little experimentation, they figured out a way to couple their wifi to the mains cord for better reception. I'm not a radio guy by a long shot, but I've taken apart enough clock radios to know that's how it's done. In general, table top AC powered radios usually have some coupling between the radio antenna circuits and the AC power cord to improve reception and in some cases not need a telescoping antenna.
They released it at $1400 so they can sell it with a 50% discount. Customers will think it's a great deal and owon will still have a nice margin...
OMG. You are amazing. Never seen reviews like yours. You are just great in what you doing. Thank you so much for sharing...many many thanks!
For observing really low noise signals I use my Tektronix 5103N. It's not digital, it's kind of heavy and it has no real storage capability. But it only cost $20.
Another snide review.
I was impressed that all the EEVBlog stories about Owon lying on specs were false.
Could the 5.5v be to allow headroom to use some very low drop out 5v linear voltage regulators ?
+Charles Thatisall yeah could be
dave, just want to say thanks. i have an interest in electronics but never built or acted on it. because of your awesome videos i brought my first soldering iron and an intro to electronics kit today
Dave, there is a fuse on cable connector, so having a second on board makes no sense
Love the reassembly time lapse!
The back is curved in case it gets pushed up against something, but with no direct air entry/exit points thermal instability could be an issue. Lots of room on the DMM PCB so revisions could be made so this this could stand up to an educational market.
So far I can remember, initial Owon DSOs were really 'not ok' inside, but now they have improved a lot excepting some passive components which could easily be replaced by renowned makes. Considering price points, Owon really a charming performer & surely they will improve more - here I am confident, though I am not much confident about Dave's attitude towards Owon!!
IRQL_NOT_LESS_OR_EQUAL is usually a hardware fault in my experience - not caused by an update. Many, many things to check for, but a common and quick one might be just to reseat the memory. Windows 10 may be extremely annoying with its slow, forced updates, but the update mechanism itself is pretty solid! Also, +1 for the Owon scope. Our shop runs on Owon scopes (the mid-low end ones like the SSO8192) and they're fantastic to use, intuitive and straightforward for folks that aren't hardcore hardware geeks ;) Battery is very useful for isolation, not just travel!
i had IRQL errors while overclocking(those good 'old' ivys from like 2012), but I had them on completely stock machines as well
Analyzing the memory dump with a debugger can do a lot to solve the problem.
Jeff Metten Uhh yeah, sure. Then what? How do you fix it? Talk bad about Linux's useability, but I've always been able to rescue a linux install by chrooting into it with a live usb stick and fixing what's wrong, I've Never had a successful Windows repair. It always ends up in a complete reinstall. Whereas with linux, you get back up and running.
If you buy one once the warranty runs out the first thing to do is to replace all the caps
Or sell.
8:55 , looks like cold solder joints on the Common and V input jacks? If so, those'll crack and fail in due course.
Thank you.
I did find it very interesting.
You are a very pedantic and in depth reviewer. ✔
Aren't those antennas taped on? Kinda scary place to put it.. :O What happens when the adhesive dries up as it usually does?
the world explodes
"What happens when the adhesive dries up as it usually does?" -Look at your avatar.
It's the "normal" product nowadays. By the time the adhesive dries up and the product goes kaput, the warranty is expired and you're supposed to buy a new one. 99% of the products are like that, unfortunately.
Check out that burn mark on the C624 connector at 17:56. Chinese quality control at it's finest.
Big thumbs up for this teardown. I'm guessing the 5.5V input is to allow for an LDO for clean 5V power. Maybe an ideal diode power priority chip in there somewhere for the battery backup...
For the most part I am happy with my Owon aside from the lack of support for current operating systems for the pc support.
nice teardown! i have another simmilar one (XDS series also) i can say that after one hour the case gets quite hot on the edges because of that bad thermal design :(
That sudo IR port at the top right of the screen maybe a con into making you believe there is more functionality to this scope than there really is. I wouldn't fork out this price for what is inside.
The adc's are about us$100 each at 100 qty (mouser uk prices)
+makebabymake ouch. I wonder what they pay for them?
I wish you would do the TAO3104a .. it seems to have the same specs as this, only in a tablet form factor. It would be a great candidate for a shakedown. It's quite a bit newer by Owon, and we could see if their layout is any better now, all these years later.
If nothing else, Dave can surely turn a colorful phrase!
Burnt connector at 18:05
perfect soldering iron tip rest. i mean where else do you put that thing?? lol....
What is the purpose of using all that relè? I mean, the pros and cons in that kind of design. And why do you like their usage, Dave?
Thanks !
another good watch mate. Cheers for that
10:45 Still probably has better thermals than just about any MacBook (Pro)...
It's an integrated product of Apple, iLapWarmer LOL
It looks good enough for most ordinary use, the inside looks fine, it consumes bugger all.
It won't get hot enough to die fast, the crappy caps won't be doing much.
I'm allways supprised how much they can cram into bugger all space :-).
That applications processor is the same processor used in the Beaglebone!
Long time ago, I see, but this scope is still on the shelves. Could you maybe also look into the things as:
Interval (△T) Accuracy (full bandwidth): Single: ±(1 interval time + 1ppm x reading + 0.6ns); Average > 16: ±(1 interval time + 1ppm x reading + 0.4ns) and..
Sample Rate / Relay Time Accuracy = ±1ppm
...or maybe somebody else can make a comment on that.
Look at those dry solder joints on the dmm input jacks.... Terrible.
Not only the DMM input jacks: the oscillator board looks horrible! That SOT23-5 looks like it will drop off just by looking to hard at it.
But it has a QC Passed sticker!
The 10A shunt is adjusted by moving the solder around until the shunt is in calibration - hence the messiness. This is the normal way to adjust wire shunts!
Stevie wonder is blind, not stupid lol.
hahahaha wow
And that's what he meant; Are you blind, can't you see how terrible where they chose to place the fan, one must be blind "like Stevie Wonder" to place the fan squeezed under the board as shown in the video @10:40
So your scope says wifi, but I see no antenna?
Well, the entire powergrid is the antenna!!!
17:14 what's going on with missing the R139 & R140 and flux residue - someone reworked the board ...
+zaprodk I watch the video through the small camcorder screen, and in taking at the same time. Easy to miss stuff
Sorry, that text came across all wrong - it was not critique. It should have said "what's going on with the missing R139 & R140 and flux residue". But maybe explore what it might be? Can it be resistors that set the model in software?
Hi! I have some trouble measuring the inductance of a coil in a bipolar stepper motor (20 Ohm resistance). I have used several methods using function generator and oscilloscope. So far, the results are pretty much all over the map. Please discuss this topic (maybe in Fundamentals Friday..?)
7:00 is the earth wire on the wrong IEC pin? Looks like it on the Neutral pin.
Hopefully there are some weirdly routed traces on that board. And it could be LIVE as well, we have 230 V 50 Hz in Europe and unpolarized plugs.
who did that stevie wonder!! I'm ROFL Dave.. I think you nailed it all. That is absolutely the worst place to put a Wifi antenna because there is going to be 50/60Hz coupling on to the wifi frontend most likely uckkk, the fan arrangement is hilarious
Amazing review.. thank you sir
Stupid question because I'm not watching these: Why is it only 14 bit?
Lu Tello Making accurate, high speed converters gets exponentially more complex as you add bits. Many oscilloscopes are 8-bit as a result. A 16-bit converter would have to be very slow or extremely expensive.
Lu Tello If it helps clear things up, the "bit" specification refers to the analog to digital convertor (ADC) and not screen colors or anything like that.
"only"
To expand on this, each bit doubles the effective resolution of the scope, so a 14-bit scope has 4x the resolution of a 12-bit scope.
techmage89 technically yes, but you have to start looking at noise floor and ENOB at that point, I won't go into it but it becomes the precision vs. accuracy discussion
Installing electrolytic capacitors directly next to a heat sink is a deadly sin, but good for OWON,s business. OWON, no thanks !
I find Owon uses more reputed semiconductor part brands for their product than Siglent or Rigol. Am I right here in my observation ?
Since the internal rail is 5.5v I wonder if you can charge the internal battery over the USB device connection? Not enough to supply the 20W it wants to run, but you could totally charge while it's off
18:13: Is there a short between two pins of the Ethernet connector?
I think it does not mind because the two pins should be GND on the connector
Hello Dave. I don't know any other vlog, like this, and probably no other with so much content or subscribers. Good Job!
What do think of rate the oscilloscope. Like give a "Gold" or "Silver" award?
In W10 pro the update service (still) can be disabled to prevent "blue" surprises like that.
Good morning Dave... :)
Yeah, he totally needs to have an offsite sample of the AI that occasionally chirps out random movie quotes: (Dave is busy tearing into another brand new scope) and then... "what are your doing Dave?"
- Eddy
Umm.. The fan points clearly to the rear board. You can see the arrow on the fan pretty good ;)
+Robbe902 the heatsink, you know, that thing you want to get the heat out of, is on the other side of the board.
Yes, I saw that too. On the other hand, the cooler has no fins anyway to spread the heat effectively. I do not know how much waste heat is generated by the display or other components on the front, or if the fan is only installed to create any air movement (to pull warm air away from the front). You're absolutely right that this fan is somehow .. misplaced in its place.
how bad was the soldering on the multimeter board and i saw a lot of bad soldering .for the price you would think the QC would be a higher standard .I see alot of potential faults waiting in the wind with that particular scope
There's a fuse in the AC connector, maybe you should use a multimeter cable with built in fuse :D
I'm totally new to this game, one of the young players who fall for the usual traps.
My question is: why would one need 14bit ADCs? Dave said this is a niche product, what are the use case scenarios in which I'd need 14bit precision out in the field?
Normally a 8 bit scope has only 256 steps in the waveform, everybody wants more bits, especially when you are used to analog scope.
btw dave how about you make a video about how to identify chips and ICs? like what of the scribbles on them is actually important and where to look them up
5:20 I fell off my chair laughing...damn you dave!
look inside the cisco routers 26xx - see the same fan implementation...
Thank you a lot for all you video.
Since I started to follow I improved my english and got used to your accent. And of course I learnt a lot of electronic stuff I didn't in college!
no fuse in the power supply? could that be because the socket itself appears to be fused?
The pcb's of the scope looks like something a hobbyist would design
Hey Dave, any plans to do a test power-up of that core memory you got a while back? I would really love to see that thing in action.
now i stevie wonder how the test equipment works for basic troubleshooting? if it works who cares what is under the hood? i just don't know? great video and thanks a lot...:) pricey
Nice video... Helped me with disassembly. Has anyone been able to flash the firmware on this model? Is there any recovery tool that can keep the device powered on when the self test fails and the device shuts down within 10sec. does it turn itself off including the USB connection?
Is it the same processor as the BeagleBone?
Dave, isn't it a bad design having 4 coil (of relays) UNDER THE SHIELD? What for are the shields then behind the front ends inputs?
Do they use " low noise" regulators to get down from 5.2 V ? I' ve learned that's important with vcos an ADCs!
no no no ...... i see it's a amazing machine.... thanks for showing it.
can't you see it....?
I got the 100MHz 12bit 'little brother model' XDS3102A Plus and I can concur that the XDS3000-series is amazing! Only thing I'm not happy about is the provided probes, they're garbage.
And for some reason my scopes device mode USB doesn't work...
Hey Dave, the fan is blowing the other side, they always blow away from the sticker side from my experience
I want to build a basic oscilloscope, where should I start? Right now I'm using an old tube TV as a wave visualizer. I've taken a couple circuits courses so I know about op - amps, diodes, mosfets etc but I'm not sure how to combine all of those things to make an oscilloscope.
a CRT television is a basic oscilloscope.
you have both the vertical and horizontal drivers and a time base generator in b&w or color TV. however the ' time base ' is the horizontal scan rate of NTSC video.
all you need now is an input buffer and a trigger amplifer
If it doesn't weigh 50 lbs and take up significant bench space, it's not a real piece of test equipment... :) Oh, and it should consume kilowatts of power, too.
Is it just me or does this seem to be not worth its price point when looking at build quality.
Could that black plastic you 've mentioned be a IR window for some kindof remote control?
I don't feel the "jump on it"... Maybe for 800 bucky?
Hey EEV blog, you did make a remark at ~21 minutes that this scope is not really polished ... Have you a the teardown link/referenceof the most polished scope that you have made ?
Thanks !
Hi. I had a pds5022s oscilloscope, every thing is good .but had a bright circle on LCD display center ( 2 inches diameter ) could tell me what the problem of it .Thanks
Hello there! Maybe it's a silly question but it's nevertheless a question I'd like to ask anyway,
I have the feeling that when watching these videos I never get to completely grasp the subject. Ofcourse I would really really like it, and your videos are very educational aswell, love them! But I guess I'm feeling overwhelmed by the material. I have a background in Chemistry and I'm currently studying IT (majoring in cybersecurity), so not completely unfamiliar but still.
I guess I'd like to ask you,or any of the other fellow commenters and wonderful followers where to start?
This oscilloscope is insane.
Ah, Flimsy Semiconductor.. I give those multimeter boards one chance in a hundred of surviving a week of real use, even in 'low energy' environments..
Xunda caps are on the move, Xunda caps are loose
Wow... that multimeter section is really a sad one O_o
>$1,400 oscilloscope
>make out of plastic
Excellent review! I think siglent SDS1202X-E is way better than this nicely assembled underengineering.. Lol
I'd love this to be Linux, then it could be hacked about, maybe make it a universal machine, maybe turn it into a very expensive guitar effects unit too.
i'm wondering could u install a ssd drive in an oscilloscope at all to make it a pc i know that is a dumb question but seance the cpu is almost like a pc cpu could you just wondering???
Nice video 👍thanks
What switching IC are they using for their switching? Is it just a typical rectifier with stepdown windings plus a buck?
What's a "typical rectifier with stepdown windings plus a buck"?
Especially at that power level, you don't expect a whole lot of complexity. It's just your bog-standard off-line flyback converted. That TO-220 package on the primary will be the all-in-one PWM+MOSFET combo (think stuff like the TOPswitch line).
What I meant by "typical rectifier with stepdown windings plus a buck" is an offline converter! I didn't know it had a specific name for that topology. Thank you for commenting, learned something new! And yes, I can see now that discreet parts really wouldn't be necessary.
For the record, "buck" is by definition a non-isolated step-down converter - not something you'd want in mains-powered gear :P
14:38 That soldering on the oscillator daughterboard is awful -- solder hasn't wicked to the legs or the pads...
Why are the slots cut under the resistors at 8:12? Could someone enlighten me?
The pcb material actually has a lower resistance than air, so to increase the dielectric strength between terminals, you put the gap in. If you look closely, you will see several other notches. This actually increases the cost of the board. Routing isn’t free like drilling is . As long as the holes are not too large.
blimey, one of those FPGAs is over $100!
I WOULD DROP $700--$800 ON THIS ONE
Thank God, people don't do reviews on "God", imagine the design flaws, air flow issues, pretty much totally imperfect design..
Dave whacked the heatsink off...
good afternoon. How can I buy from you a multimeter brymen 235. I really liked it.
This entire scope looks a little "How ya Doing"
sir , thanks for videos ...sir plz make some videos on resume writing or core job searching.......
That fan *sucks both ways*. They had plenty of space to put it somewhere else where it would have made a better job.
1500Euros is way too pricey for any hobby application, but I guess it was not made for hobbyists.