ADDA is a well known fan company and is considered pretty good. Of course, every company can build something down to a price, but I would still trust it.
I'd bet that fan is noisy just because it's directly bolted to that piece of metal, producing a sounding board effect for any noise the fan does make. I've heard of ADDA, they actually make a pretty good fan. Maybe not top-of-the line per se, but they're a perfectly adequate choice for most applications. I've even pulled a few out of late 90's to early 2000's Sun or IBM servers that were being scrapped. If they're good enough for IBM and Sun, they must be doing something right. One last thing, the metal chassis looks like it's aluminum, but I could be mistaken. It would certainly explain the lack of rust, material thickness, and use of threaded inserts instead of just cutting threads in the base metal.
+44R0Ndin Whilst mounting the fan on rubber is a no-brainer (another scope he opened up recently had rubber and a dedicated chassis bend to soak up the vibrations, and was very quiet), there's also the fact that air hitting items will create noise patterns too. For example, in PCs meant for dead sound rooms (at least when i saw it years ago) they used to have baffles over the CPU area and the air was ducted solely to the heat sink. In short, IMO, you can have the best chassis+rubber design, it won't do squat of it hits a blunt item and it starts to "whistle". Just my two cents on the fan deal. ;)
+Patryk Buczyński Quite so. I would say they are middle of the road quality fans and good value. Used several ADDA fans for around 10 years and they are pretty good for the price. I suppose only aficionados will know the brand.
Only just started to watch, but i await to see the standard "Siglent rust" feature that is in EVERY other product they squeeze out of their diseased teet.
Dave -- we WANT you to turn it on! I don't mind the teardowns (though they're all starting to blend together, as far as the scopes) but we want to see the UI, the performance, and some features of it!
Dave- a little PSU design note- a lelon primary cap isn't a major issue. Secondary caps, yeah, they're trouble. Primaries, not usually an issue; they're pretty low-stress.
Dave, NOBODY in production would have a manually operated pop rivet gun. I used to hate on pop rivets until I saw a competition robot held together with them getting the crap beat out of it every match and no problems. I talked to the team, they have a pneumatic pop rivet gun and they love the thing.
since it give you access to the 2pins fan header, you could change the fan easily, and if you have a Molex or 3pins fan, you can still use an adapter for it, and even use special adapters (or make your own) to slow down the fan if it's too high-speed.
He stated 49.9 ohm resistors bother him because they are not quite 50 ohm. Actually, it should make him happy because 49.9 ohms is always a 1% resistor, and a sign of quality. Probably helps keep calibration for that part of the circuit.
It could be designed for 12 year old Chinese factory workers. Or, maybe the idea is to unclip the battery and let it fall in the case, then you turn the scope upside down and shake it out.
Dave, when trying to fit some footage into a e.g. display, use the effect "Corner Pin" (I think it's called like that in the EN version of Premiere Pro) to fit the footage into each corner of the display, and apply a opacity mask.
Betting the ADC is a ADC08DL502. Only one in a 144 pin LQFP in digikey. Those corner pins really look like the NC pins on that part too...the ones in the right bottom corner in particular
That scope gets great reception! It's like HD!!! (lol) My question is... why don't they use independent AGC's for each channel? I know... BOM... but still. AGC's aren't that big of an expense in the big picture, compared to FPGA's...
Yolo, these Siglent scopes as well as their other gear looks quite interesting and a good deal for the price, but they're also not easy to get in Europe. I would actually like to get a scope I've seen for real, but no store seems to sell them. And on top of that, the Rohde & Schwarz is actually cheaper here.
Woah, the front of that thing looks like someone had played with the desaturate feature in Photoshop. Also, what's wrong with ADDA? It's pretty decent, it's certainly no Xyao Jing, come from factory stuck fans. Asus use ADDA fans in some of their laptops.
0:25 Dave it would be cool if you could really play videos on one of these, I've seen videos on here where others have modified their older scopes and turned them into green and black TV screens. Hey, how about playing DOOM on this.
flux residue may have been from a repair after reflow. the skewed part is certainly suspect... if they have an xray then why not AOI? pretty shady QC if you ask me..
Shame that isn't a proper PC fan they're using with PWM, though with a little soldering you can re-use the connector from the old fan with a newer, better fan by a reputable PC manufacturer, then use shrink tubing to keep the severed copper leads from touching metal.
ADDA are actually good quality fans, not cheap ass. Delta or Nidec would have been better but Lian Li used them as their OEM fan supplier for many years.
FOD? Foreign object debris/damage Aircraft carriers frequently conduct emu parades along the deck, involving all non essential personnel, including the captain, to pick up anything dropped on the deck which could threaten the safety of the aircraft and the carrier I once purchased a $10,000 broad, roll fed, inkjet printer It was trouble from the start . I was told to clean the print head I noticed that the PCB was fouled with chewings from self tapping screws It went off for repairs, a two man job. It still had problems. Again I was told to clean the heads This was done by the machine several times and used up a lot of ink I took the print head off to inspect it, and found it was peppered with tiny craters in the plastic I bought a microscope, cost $200, and could see that most these craters had tiny globs of, presumably, solder in them, some blocking the jets I was able to get a complete working replacement printer, but only after I wrote to the president of the parent company. One of the biggest manufacturers of military aircraft in the world I firmly believe that a serviceperson should keep their workplace tidy, not flick solder all over the place, and wick or suck up excess solder
I must say, i'm still a bit "i don't know" about those gazillion-updates-per-second thing - i'm willing to bet the refresh rate of ANY lcd's that go into digital scopes is no higher than the de-facto 60Hz standard, so... What gives?
+KhronX Yes the LCD refresh rate is at around that 60Hz but the image is processed before displaying and all those gazillion signals are put on top of each other and color grading is applied so where the signal happens to be most on each update the trace will be brighter and the occasional blip will still be captured and shown as a faint less bright color.
Selects the voltage range of the input. The ADC accepts signals up to around a volt (maybe as much as 3, idk), so the "front end" circuit has to divide the input signal to provide the ADC something it can work with. You could have a fixed ratio of, say, 1/100 so that a 100 volt input maxes out the ADC, but for smaller signals that would be like trying to measure out a gram of salt by standing on a bathroom scale and pouring the salt in your hand
It seams that today's video keyword is "I will not bother" :) That's a shame, with time there will be quite a few videos from other bloggers that will open these scopes and just talk about what they see as you did here. You could make your video stand out by actually making some more in depth investigation which you did not bothered to do.
EEVblog Just watch video again and count how many times you said - I will not bother doing this or that. Some of those do not require days of work but would make your video more interesting and would put additional value. Please just accept my post as feedback or ignore it if you don't care. Not all of your viewers are "bank accountants" or "mechanical engineers" which may be satisfied with simple verbal overview of the board since they are from other field of expertise. I just want to voice my opinion and in doing so contribute to evolution of the channel.
pure luck on the battery front. just like the small cutout to its left that appears to do nothing, I'd be willing to wager it was just pure luck it ended up like that.
really dave? adda is a no-name manufacturer ? at least don't sound so sure when making statements like this , say you haven't heard of them . You've goofed up before like this. If you haven't heard of a brand it doesn't mean it's rubbish
props to siglent for not scratching off part numbers like rigol.
Words can't describe how excited I am to see your new lab!
ADDA is a well known fan company and is considered pretty good. Of course, every company can build something down to a price, but I would still trust it.
ADDA fans are actually fairly decent. They're not a Delta or Sanyo-Denki, but a lot better than a no-name.
A video on using JTAG to gather information and potentially reverse engineer a device would be really cool, I'm into all that fun security stuff.
I'd bet that fan is noisy just because it's directly bolted to that piece of metal, producing a sounding board effect for any noise the fan does make.
I've heard of ADDA, they actually make a pretty good fan. Maybe not top-of-the line per se, but they're a perfectly adequate choice for most applications. I've even pulled a few out of late 90's to early 2000's Sun or IBM servers that were being scrapped.
If they're good enough for IBM and Sun, they must be doing something right.
One last thing, the metal chassis looks like it's aluminum, but I could be mistaken. It would certainly explain the lack of rust, material thickness, and use of threaded inserts instead of just cutting threads in the base metal.
+44R0Ndin Whilst mounting the fan on rubber is a no-brainer (another scope he opened up recently had rubber and a dedicated chassis bend to soak up the vibrations, and was very quiet), there's also the fact that air hitting items will create noise patterns too. For example, in PCs meant for dead sound rooms (at least when i saw it years ago) they used to have baffles over the CPU area and the air was ducted solely to the heat sink.
In short, IMO, you can have the best chassis+rubber design, it won't do squat of it hits a blunt item and it starts to "whistle".
Just my two cents on the fan deal. ;)
I think ADDAs are quite regular shelf fans. Nothing fancy, but good enough for most of the PSUs and other stuff.
+Patryk Buczyński Quite so. I would say they are middle of the road quality fans and good value. Used several ADDA fans for around 10 years and they are pretty good for the price. I suppose only aficionados will know the brand.
ADDA is actually a well known fan maker.
+mrlithium69 Some of their older ones were trouble in Hipro PSUs. Death ADDAs as we'd call em. Newer ones are good.
Only just started to watch, but i await to see the standard "Siglent rust" feature that is in EVERY other product they squeeze out of their diseased teet.
I like the layout engineer that put in the SN label and decided it needed a bunch of underscores ___________________
Yolo, that battery still looks like a pain to get to.
Dave -- we WANT you to turn it on! I don't mind the teardowns (though they're all starting to blend together, as far as the scopes) but we want to see the UI, the performance, and some features of it!
Color scheme and knobs looks like an Easter special
Dave- a little PSU design note- a lelon primary cap isn't a major issue. Secondary caps, yeah, they're trouble. Primaries, not usually an issue; they're pretty low-stress.
+Larry Bolan
From what little experience I had, I have to say I've seen primary caps fail almost as much as secondary caps, across various SMPS's.
Nice Yoloscope!
Very interesting tear down. Thank you Dave.
Dave, NOBODY in production would have a manually operated pop rivet gun. I used to hate on pop rivets until I saw a competition robot held together with them getting the crap beat out of it every match and no problems. I talked to the team, they have a pneumatic pop rivet gun and they love the thing.
since it give you access to the 2pins fan header, you could change the fan easily, and if you have a Molex or 3pins fan, you can still use an adapter for it, and even use special adapters (or make your own) to slow down the fan if it's too high-speed.
Great job, Dave!
ADDA fans are not actually "one hung low" . They do make quite a wide range of fans, decent quality for the price. You can find them in many devices.
15:50 When you look at the corner of the ADC it looks like the 2 last and first pins on each side are not even soldered onto the board. Weird.
i miss the old outro's :
He stated 49.9 ohm resistors bother him because they are not quite 50 ohm. Actually, it should make him happy because 49.9 ohms is always a 1% resistor, and a sign of quality. Probably helps keep calibration for that part of the circuit.
Even with a cut out for the battery. It still doesn't look very easy to replace the battery.
It could be designed for 12 year old Chinese factory workers. Or, maybe the idea is to unclip the battery and let it fall in the case, then you turn the scope upside down and shake it out.
YOLO !
+Neil Robinson Custom screensaver : YOLO 2000X :))) I like when he say Yolo :)
Dave, when trying to fit some footage into a e.g. display, use the effect "Corner Pin" (I think it's called like that in the EN version of Premiere Pro) to fit the footage into each corner of the display, and apply a opacity mask.
Betting the ADC is a ADC08DL502. Only one in a 144 pin LQFP in digikey. Those corner pins really look like the NC pins on that part too...the ones in the right bottom corner in particular
Speaking of scopes, I don't have that EEVBlog used scope in the mail yet. What happened with the competition?
I love how the video link appears in the same area as the o-scope screen.... Now if only you'd hack it to display it for real.
Tks for the video, Dave,
Yolo, ADDA seems good enough for me,, when will the function video of it be released???
I enjoyed the scope-ception effect
Me: *watching this video*
Daughter: whats that?
Me: an oscilloscope
Daughter: a silly scope?
me: yes
Daughter: whats so silly about it?
That scope gets great reception! It's like HD!!! (lol)
My question is... why don't they use independent AGC's for each channel? I know... BOM... but still. AGC's aren't that big of an expense in the big picture, compared to FPGA's...
Is there a review planned for this scope?
Might need to rename the EEVblog soon to Scopeblog or something similar
Dave why on so much test equipment do they have an internet cable port? What's it for, to download software updates or does it have another purpose???
Dave - why would the channel front ends not be identical circuits? Showing my ignorance here.
+Dino Papas Shared decoding chips . Say you have an 8 line device and a channel only need 4 lines. Silly to not make use of one chip per two channels.
+EEVblog Thanks!
+EEVblog They both seem the same to me, just different layouts on the odd ones.
The CE label on the back has incorrect spacing to be genuine (doesn't mean to say it's not).
I just buy it ! , work very weel.
***but need more firmware upgrade !***
how often I tried to measure a wafeform with the exteral trigger of the Rohde&Schwarz...
Dave, Please make a video on how you travel on 7 Watts to Pluto.
Looks like some sort of low pass filter to limit the input bandwidth. Hope so as i have the 100mhz version!
Yolo, these Siglent scopes as well as their other gear looks quite interesting and a good deal for the price, but they're also not easy to get in Europe.
I would actually like to get a scope I've seen for real, but no store seems to sell them.
And on top of that, the Rohde & Schwarz is actually cheaper here.
The little cut-out for the battery seems nice..but,I bet if you actually tried to remove/replace the battery,it would be a pain in the butt.
Amazing that the US chip companies still dominate in the world market for high end FPGAs, DSPs etc... Wonder how long that will last?
+Herbert Susmann The first chinese company is at the start. Called "Gowin"
+Chip Guy Vids
高云半导体
WTH :) These symbols look like capacitors, MOSFETs and the last one looks like a diode. Google translates this to "Gao Yun Semiconductor" Amazing!
Nice scope
14:15 Dave spits on the chip in the top right, confirmed dave is chipist
Woah, the front of that thing looks like someone had played with the desaturate feature in Photoshop.
Also, what's wrong with ADDA? It's pretty decent, it's certainly no Xyao Jing, come from factory stuck fans.
Asus use ADDA fans in some of their laptops.
Am I the only one thinking these heasinks should all be rotated by 90°?
0:25 Dave it would be cool if you could really play videos on one of these, I've seen videos on here where others have modified their older scopes and turned them into green and black TV screens.
Hey, how about playing DOOM on this.
flux residue may have been from a repair after reflow. the skewed part is certainly suspect... if they have an xray then why not AOI? pretty shady QC if you ask me..
It looked like glitter nail polish on those nuts. I've never heard of anyone using glitter on their nuts...
They wanted them to look fabulous
Shame that isn't a proper PC fan they're using with PWM, though with a little soldering you can re-use the connector from the old fan with a newer, better fan by a reputable PC manufacturer, then use shrink tubing to keep the severed copper leads from touching metal.
That cap at 18:40 is really bothering me. And then a second one?
What's all the FOD all over the boards and the ICs?
Might even be Lattice FPGAs, they already have a Lattice on there.
ADDA are actually good quality fans, not cheap ass. Delta or Nidec would have been better but Lian Li used them as their OEM fan supplier for many years.
Make's it sense to put in a more silent fan ?
those leylon caps cant be so bad a smal hig qualiti german electronic distributer for motor control systems is using them as main filter caps
+TerribleFire
i never seen a u it turned while work placement so cant tell
+simontay1984 a german manufacturer is using those caps i think they cant be so bad
FOD?
Foreign object debris/damage
Aircraft carriers frequently conduct emu parades along the deck, involving all non essential personnel, including the captain, to pick up anything dropped on the deck which could threaten the safety of the aircraft and the carrier
I once purchased a $10,000 broad, roll fed, inkjet printer
It was trouble from the start . I was told to clean the print head
I noticed that the PCB was fouled with chewings from self tapping screws
It went off for repairs, a two man job. It still had problems. Again I was told to clean the heads
This was done by the machine several times and used up a lot of ink
I took the print head off to inspect it, and found it was peppered with tiny craters in the plastic
I bought a microscope, cost $200, and could see that most these craters had tiny globs of, presumably, solder in them, some blocking the jets
I was able to get a complete working replacement printer, but only after I wrote to the president of the parent company. One of the biggest manufacturers of military aircraft in the world
I firmly believe that a serviceperson should keep their workplace tidy, not flick solder all over the place, and wick or suck up excess solder
I thought ADDA was a good brand, is it not?
I must say, i'm still a bit "i don't know" about those gazillion-updates-per-second thing - i'm willing to bet the refresh rate of ANY lcd's that go into digital scopes is no higher than the de-facto 60Hz standard, so... What gives?
+KhronX Yes the LCD refresh rate is at around that 60Hz but the image is processed before displaying and all those gazillion signals are put on top of each other and color grading is applied so where the signal happens to be most on each update the trace will be brighter and the occasional blip will still be captured and shown as a faint less bright color.
+KhronX it's not about viewing in real time, you ll see the benefits of it when you zoom in to the signal after you capture it.
Siglent doesn't learn. They should know by now from their signal generators that those green LEDs are way too dim.
Ugh. They have melted away half the package of the chips fitting the diodes in the frontend.
that's huge place! maybe you can start reverse engineering PET scanners and cyclotrons :D
yay
Is there a firmware hack for Pong ?
What are those 4 relays actually doing?
Selects the voltage range of the input. The ADC accepts signals up to around a volt (maybe as much as 3, idk), so the "front end" circuit has to divide the input signal to provide the ADC something it can work with. You could have a fixed ratio of, say, 1/100 so that a 100 volt input maxes out the ADC, but for smaller signals that would be like trying to measure out a gram of salt by standing on a bathroom scale and pouring the salt in your hand
+mikeissweet Thanks mate. I understand now :)
16bits DSP is enough ?
why was the sn # blank?
It seams that today's video keyword is "I will not bother" :) That's a shame, with time there will be quite a few videos from other bloggers that will open these scopes and just talk about what they see as you did here. You could make your video stand out by actually making some more in depth investigation which you did not bothered to do.
+TheLaidukas Like what? You want me to spend days reverse engineering the front end? I did that on the Rigol.
EEVblog Just watch video again and count how many times you said - I will not bother doing this or that. Some of those do not require days of work but would make your video more interesting and would put additional value. Please just accept my post as feedback or ignore it if you don't care. Not all of your viewers are "bank accountants" or "mechanical engineers" which may be satisfied with simple verbal overview of the board since they are from other field of expertise. I just want to voice my opinion and in doing so contribute to evolution of the channel.
Looks like the chassis is made of aluminium hence no corrosion :)
why do they always have to cheap out on the fan ? lol
YOLO, I counted 23 relays ;)
pure luck on the battery front. just like the small cutout to its left that appears to do nothing, I'd be willing to wager it was just pure luck it ended up like that.
really dave?
adda is a no-name manufacturer ? at least don't sound so sure when making statements like this , say you haven't heard of them . You've goofed up before like this. If you haven't heard of a brand it doesn't mean it's rubbish
These modern scope teardowns are pretty stale. You seen one you've seen them all.
This is a comment.
Some of the component soldering looks... well... rushed.
I hate the black bezel around the screen is sommekind of misleadind making the display seem large that it is...
NO MORE Tear down PLEASE.
G🌚🌚D SHOW
ADDA fans are not that bad. -- various grades . . .
April fools??? :-DDD
not really my favourite type of teardown...
April the first... Again...
That cap at 18:40 is really bothering me. And then a second one?