"Who or what is Bob Lingen? Goodday Bob!" I loved that one! :D Böblingen is a city in Germany, the numbers next to the Name are the postal code. Wittig Test Technology seems to have gone bust.
Okay everyone here is the deal. If you want to ensure your mail bag item gets opened in a timely manner, put it in a large box. It doesn't matter how small of an item you send. Dave will be sure to open it by the next mail bag to make room on the shelf. j/k That proto board is a pretty neat item. I may have to look into those.
5:40 The big orthogonal wiggles in the "drunk" traces are indeed for length matching, but the smaller, angled wiggles are actually either for phase tuning or PCB weave compensation. It turns out that if you route a bus in a straight line and it happens to run parallel to the fibreglass weave within the laminate, it's likely for the signals to travel at different speeds even though they're the same length because of the differences in permittivity between the glass fibres and the epoxy resin. The wiggles in this design were added automatically by top-end PCB software from Cadence or Mentor (available as a totally unreasonably priced optional feature), but of course the cheap, obvious solution is to just ask your PCB fab to rotate the design a bit so that the weave doesn't run parallel to traces.
The reason there are so many DC-DCs for a CPU isn't for different rails, it's for multiple phases to power the CPU. More supplies (with an offset) equal smoother power. I think 6-8 phases are pretty common now.
+Peter Brockie> Absolutely. I user to be a server designer earlier and 6 to 8 phases are pretty common - we had to do these many phases as the current requirements were obscene. The FETs on the top side are high side and low side and the bottom IR chips are likely redrivers. Looking at some of the bulk caps at 1.2V these must be 0.7~1V core rails
1TB memory can be very useful. If you need to find things fast it helps to have your entire dataset in memory at all times. I'd love to have something like that to play with.
I guess there are multiple levels of 'cheap ass MMs': I have two identical looking MMs here, but they contain a lot more electronics. The wires broke multiple times from 'twisting' the pens because they're not glued in. Then a pin broke out of the pen grip because it's cheap ass plastic. Then one meter died, probably from Ampere overload. mA range has a glass fuse. It's quite accurate though and long battery life. Have to screw the entire ass bottom off to replace the battery.
Dave, that little 4 pin connector on the gps is a nmea 0183. It's a serial data interface, used to send the location data to another device. Back in the day (1993), I had Loran c on my boat, and we used the nmea 0183 port to send navigation data to the color (crt based) depthfinder screen. It was pretty gnarly at the time!
Ziginox Cool, I didn't realize that it was a two way interface. Good stuff. Watching Dave's video reminded me of how badass we thought it was back then, and where we are now! In terms of accuracy, power consumption, and real estate. I never bothered to hookup gps capability to my laptop for wardriving, Now that you mention it, I've got to add the lat / lon!
Tom Sawyer You can shave a few feet off with WAAS-capable units, but these old 12-channel units still are very close. (16 ft III+ versus 13 ft GPSMap 60Cx) If you have an Android smartphone and your laptop has bluetooth you can use GPS2Bluetooth to send NMEA sentences over a bluetooth serial port as well.
Ziginox I like your solution. Only thing is, I've got an old (~2005) garmin gpsmap 76. It's a 12 channel, waas capable. It does ok, has 0183, but no bluetooth. None of my laptops has a serial port, and I don't have an Android smartphone, so looking to get a modern handheld gps, waas and bluetooth capable. Let me know if you have a preference on a handheld gps, as you know, there are quite a few out there! Thanks.
USB-Serial adapters generally work well enough for these, especially if you're only doing NMEA data. If you happen to have an E-series Latitude, Dell makes a little wedge with serial and parallel ports that sticks on the bottom.
Nearly all those gps devices had 386 processors in them. I think it had to do with the developer kits for circuit designers for the proprietary gps chips came with 386 based diagrams, since the satellites themselves had 386 processors on board.
I have always found electronics interesting, and I was first introduced to you back during the solar roadways. I found everything you said so interesting and you obviously knew exactly what you were talking about unlike some many people on TH-cam (or in real life). I am now applying to become an electrician apprentice thanks to you.
+The9gods That doesn't make a lot of sense... electricians do completely unrelated stuff. Wiring houses, servicing appliances, etc.. sure you don't mean electronics engineering?
I realize he is an engineer, I am just saying he inspired me to go out and do something. In this case an electrician. It was he knowledge of all things electricity (circuits, equations, and overall knowledge). I see bullshiters everywhere and Dave is one of the few people I have seen who really knows what he is talking about. I don't know a lot about circuits or amps/ohms/volt, but I do know enough to spot surface level bullshit. And Dave kept amazing me by showing me how little I really did know. I have used what he has talked about to show others around me the lies people try and sale them (Batterizer/solar roadways). I hope this clarifies what I meant.
Ah that GPS brings back memories. My first receiver was the II Plus (no mapping of any kind) bought sometime in late 90s in the days before GPS Selective Availability was turned off. Prior to SA deactivation (May 2000) geocaching was a huge challenge!!
That AMD mobo is a beast, 1TB of RAM and up to 64 Bulldozer cores. I think it's still the best you can get in Opteron, at least until Zen finally drops.
I know. But the Intel equivalent Xeons would do the same. These came out just before a massive reduction in power requirements and heat production in the new(er) models. And that power to heat ratio drop couldn't come soon enough, with so many datacenters switching to blade servers, the higher density would have been murderous to keep cool otherwise.
Garmin has always rolled their own GPS chipsets. The principal founder of the company, Gary Burrell, was an electronics engineer who developed the first practical portable GPS receiver at Magnavox.
Those yellow multimeters are free at Harbor freight. They give crap away coupons to get you in the door. I usually just get the led flashlights anymore. Yes they come with battery included. when I go to flea markets they have bins full of crap like that. they try to sell them for a couple bucks each.
I instantly recognised the remote from the CD walkman/burner hybrid, my old "netMD" minidisc player has the same remote. It seemed so advanced at the time with it's USB dock etc but it aged VERY quickly against emerging flash and HDD players. Still have it somewhere though, gorgeous sound quality.
I've got one of those ZMD 407 scope probe IC's sitting here on my desk (fell out of a box onto the floor recently). I had looked at building a Compaq iPaq Pocket PC "sleeve" scope using one... back in the day, it seemed like a good idea!
They sell both of those multimeters on local chinese-run shops (Spain, but I guess it's the same everywhere). Also crappy irons and way-too-thick (2mm) rosin core solder. I keep one of each around, nice enough for messing around with and for low voltage jobs. On the analog one, notice how they reuse the cut out of the label on the front. That's efficient design and use of materials! I have done a couple mods to the yellow meter: The leads are absolute crap (and rated at 1000V!), I replaced the wires on mine once they broke with some ATX PSU ones. Also added a female barrel conector for those 9-12v wall warts with a filtering electrolitic cap (No diode or anything) Good enough to run it without the battery or charge the one inside a bit when the low battery indicator goes up. I once connected one directly to 240V AC mains in DC 20V mode (Shorted though laptop power adapter). Once my heart rate went back to the double digits, I checked it inside. A trace near the lead connectors had acted like a fuse, and the dial had gone sooty. The wires where hot. It would not turn on. Other than that it was fine. To the trash and bought a new one, it only cost me three euros fifty, no big deal. The battery itself was fine, odly enough. That trace fuse did its job splendidly. I also have a "Powerfix Profi" (Lidl Supermarket chain own brand). Made in Germany, cost under twenty euro, fairly good quality. It would be great if you did a teardown/review on it, I would send you mine but I am partial to keeping it.
Interesting story about those Necco Wafers... We have tollway systems here in the US. You basically have to stop every so often and pay for using the highway. Here in Illinois, a Chicago radio DJ discovered and announced that Necco Wafers could be used in the toll machines instead of coins. As you can imagine, the DJ got in trouble and the tollway system had it's own set of headaches trying to clean all the sticky machines and modifying them to reject the candy. The DJ's name was Steve Dahl. You can google it. It was quite a debacle
I just got a RadioShack Probe Scope. it has a separate ground connector, you don't need to power it from the circuit under test. it's pretty nice for what it was/is. newer devices like to be annoying.
You would use 1TB of RAM for a VM host, SQL server, or file server. VMs use gigabytes of memory. Most VM workloads are I/O bound (reading/writing databases, and doing network I/O), so your main limiting factor for a VM host is memory.
Looking at these wonderful specs of that hybrid analog-digital meter I remembered I used to have one of tthese cheapie digital ones that in manual stated it has "3 1/2 inch digits" - that would be nice readability for pocket multimeter:)
That ProbeScope uses the small ground wire with the pin end to ground in the circuit under test. I usually power it with a 9v battery separate from the circuit. It does work, and works as a pen DVM.
You have to take a look at Fujitsu Motherboards... all single side mounting, they know how to design a motherboard for minimum stress for components at reflow process.
Last edit, I looked it up and well its a Server/Workstation Technology Extended form fact which is only used by Super Micro. Its size is massive at 457 × 330 and that its about 2x a normal ATX board (about 250 x 200 ish.)
Id imagine that the rubber grommet things on the shielding of the walkman would probably be there to minimize vibrations to ensure you don't mess up your disks.
love that i386 QFP chip in the GPS, you should cut i a SDRAM to see the multi-layer PCB layout and maybe explain a bit about the making process of those things (macro lens will come in handy)
you opened that up and I knew exactly what it was, it is actually a sister or cousin of the KGPE-D16 I am using now with a max of 64 cores something like 128+mb of CPU cache and something like 4Tb of ram, you can actually see the cut out where the Pike would go, which is a special RAID controller for these AMD boards.
The company who made the Probe Scope, Wittig Testelektronik, is still around, and they have a successor to the Probe Scope (original name osziFOX) called the KeyScope.
When it comes to ruining a single pin on those motherboards from my experience the processor still works with two broken pins. Not sure what sort of a performance hit it takes but I didn't notice anything.
Sony burner/player: the downside is the cd media changes alot over time so it's unlikely new blanks will burn right with it's current firmware. you probably want to look for the hard-to-find 640-meg cd's and not the standard 700-meg ones. I had to full-screen it to see the label for your Jamaica Plain. That's out in the Boston area, about 3.5 hr drive from me.
Ok, the Böblingen question is probably thoroughly answered already. I had one of those Sony discman-burner-thingies, and my kids used it in its discman personality until the lid lock broke (and even a bit after that, with a rubber band to hold the lid in place). The probe scope - well, I wouldn't want to count too much on that 5MHz effective bandwidth advertised on the box, given that the serial connector isn't even specified for more than 20k bits/s (at least in the original spec from 1969), and the highest I've seen from RS-232 is 230k bits/s. 5MHz, yeah. And the shrink-wrapped multimeter with the crusty battery... well, at least it only cost 60 cents :D
TM80 NotGoodWithNames Nah I don't know if it is or not, just like: it's leaky and random battery, on a meter that costs less than a decent battery = stay away just in case!
TM80 NotGoodWithNames At the end of the video, that 9V battery that looks like crap (and is the thumbnail) says it contains Hg, aka Mercury. Could be amalgam, could be safe, I wouldn't even vaguely risk it and I would 100% avoid handling it and take it to hazmat disposal.
ive used the last analog multimeter for a grade 10 project where it was measuring current. it showed how relays take huuuge amounts of current comparatively with the 10 othet circuits (had 11 circuits on it each doing quite a diffrent job. all on one power rail with the switch on negative and this joke on positive) it was also intresting to note that the Ti SN74LS08N And gate took almost 100 mili amps to operate a 15 mili Amp led!! (which I verified with my UniT ut61c to be 108mA, that meter being my first ever that I own and use!) I wish I could send you some photos some day but ive got lots of stuff to do and the thing has seen better days than the teacher's basement...
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in the industry we used to call that form factor "the monster" lol it goes in a clear top desktop style case i think and it remainds me of the boards with a split down the middle for redundancy but that looks all built in non redundant lol
Couple comments on the motherboard: The yield thing is exactly what I think of when I see these boards. OTOH, boards like this usually come in a few variations, with and without certain add-on features (like RAID, multiple NICs, etc.) So if the RAID controller ASIC doesn't pass QC, take it off and sell as a non-RAID version rather than scrapping the whole board. RAM -- whaaat iiis it goood for (absolutely nootthhin). Two things, mostly: 1) Scientific apps, modeling, and big data. Keeps the dataset in memory. 2) Virtualization. With 4 multi-core CPUs and 1TB of RAM, you can virtualize your Active Directory domain controllers, email, web servers, applications servers, print servers, file servers, app servers, dev and sandbox servers, etc. Interestingly, the more CPU/RAM you have, the less useful those multiple SATA ports get. At some point, if you're virtualizing 100 servers on one physical blade, you don't want your storage local anymore. Because that's too many eggs in one basket. You want at least two physical blades for redundancy and load balancing, which means you need the storage to be shared -- via iSCSI or Fibre Chanel for example -- on its own redundant storage array. This also allows the hypervisor to move a VM from one physical host to another, while the VM is running. (e.g., vMotion.) Also, I don't know very much about AMD CPUs, and I haven't looked at this board in particular, but I would suspect those "north and south bridge" chips aren't that. North bridges have moved into the CPU for the most part because the CPU-to-RAM interface is getting too fast to decouple easily. Those ICs could be PCI bridges, RAID or network controllers, or more traditional south bridge tasks like USB, etc. I could be totally wrong, too.
@EEVBlog I also must correct you Dave - those two chips at the bottom (SR5690/SR5670) would not be considered part of the northbridge but in fact make up the southbridge. The northbridge is integrated onto the CPU die these days. AMD processors have a crossbar switch (think of it like a ethernet switch) with 3 or more links connecting the sockets and the southbridge - the southbridges will have one or more hypertransport links depending on the implementation - it's pretty flexible and how these are connected / switched depends on the implementation. The switching is configured by the firmware and includes the socket topology (node 0 connected to node 1 on link 1, ect.) But yea, what you would think of as a traditional northbridge (memory controller) is now on die sitting on top of that switching technology and those IO devices are considered southbridges or IO companion chips. ;)
(In fact - those wiggly lines / differential pairs you show on the underside going between the sockets are probably the hypertransport links connecting the nodes)
That protoboard is a decent idea, but what happens when I want to route more than one signal on one side of the chip? You just end up shorting all the pins together? You'd end up with the knife out anyway to cut away the connections. I'd rather just have a plain old double-sided protoboard, or get PCBs made. But good effort, and I hope someone finds it useful. I think it would be more useful in smaller pieces, so you can route out like an 8-pin dip or something.
Haha I lusted after one of those Tandy probe scopes back in the day. Probably just as well I couldn't afford one, as I would certainly have poked it somewhere I shouldn't xD
Now I knew how my name would be pronounced in english, thanks Dave. Ike is quite right. The "e" at the end is pronounced "a" , like the indefinite article. Greetings from Hamburg.
I live in Canada and never heard of Nekko wafers until a few years ago from my Yank friends. I love candy, so I was bummed out that they're not sold here. Then finally a couple of years ago I found some in a store with specialt imported candy. I absolutely loved them! Unfortunately I can't eat them anymore as a result of breakinh or losing most of my molarsand I think chewing them with my front teeth would be horrible. Still worth it though.
Well since you asked, a VMware environment would make good use of four multi-core CPUs and 1 TB of RAM. These days, the ratio of VMs to physical servers has gone through the roof.
![PASULOL รามเกียรติ์ ตอนที่ 4 นนทกพบรัก [Ramakien Ep.4: Nonthok in love]](http://i.ytimg.com/vi/tMUQgmZzf_A/mqdefault.jpg)
"Who or what is Bob Lingen? Goodday Bob!" I loved that one! :D Böblingen is a city in Germany, the numbers next to the Name are the postal code. Wittig Test Technology seems to have gone bust.
Okay everyone here is the deal. If you want to ensure your mail bag item gets opened in a timely manner, put it in a large box. It doesn't matter how small of an item you send. Dave will be sure to open it by the next mail bag to make room on the shelf. j/k
That proto board is a pretty neat item. I may have to look into those.
5:40 The big orthogonal wiggles in the "drunk" traces are indeed for length matching, but the smaller, angled wiggles are actually either for phase tuning or PCB weave compensation. It turns out that if you route a bus in a straight line and it happens to run parallel to the fibreglass weave within the laminate, it's likely for the signals to travel at different speeds even though they're the same length because of the differences in permittivity between the glass fibres and the epoxy resin. The wiggles in this design were added automatically by top-end PCB software from Cadence or Mentor (available as a totally unreasonably priced optional feature), but of course the cheap, obvious solution is to just ask your PCB fab to rotate the design a bit so that the weave doesn't run parallel to traces.
Fascinating. Thanks.
love the AMD and Intel chips sitting side by side in that GPS. :D
The reason there are so many DC-DCs for a CPU isn't for different rails, it's for multiple phases to power the CPU. More supplies (with an offset) equal smoother power. I think 6-8 phases are pretty common now.
+Peter Brockie Didn't know the requirements were that heavy. Makes sense though.
+EEVblog The current requirement is also ridiculous - around 120A at 1V.
+Peter Brockie Yea Peter even my gaming mother board is 8+2 Phase, really handy for over clocking stability.
+Peter Brockie> Absolutely. I user to be a server designer earlier and 6 to 8 phases are pretty common - we had to do these many phases as the current requirements were obscene. The FETs on the top side are high side and low side and the bottom IR chips are likely redrivers. Looking at some of the bulk caps at 1.2V these must be 0.7~1V core rails
+Peter Brockie Look up the number of phases on my Asus X99-E WS board.
Bahaha! Totally got a kick out of the batterizer joke. Catch ya on the next one! ✌🏻
Why isn't laptop RAM bright?
Because it's SO-DIMM.
Oh, computer jokes. I love them.
lol
_writhes_
1TB memory can be very useful. If you need to find things fast it helps to have your entire dataset in memory at all times. I'd love to have something like that to play with.
LOL I think we can call it the "Cheese" meter. It's Yellow, ships in vacuum pack and has mold growing on the battery!
lel
I guess there are multiple levels of 'cheap ass MMs':
I have two identical looking MMs here, but they contain a lot more electronics. The wires broke multiple times from 'twisting' the pens because they're not glued in. Then a pin broke out of the pen grip because it's cheap ass plastic. Then one meter died, probably from Ampere overload. mA range has a glass fuse. It's quite accurate though and long battery life. Have to screw the entire ass bottom off to replace the battery.
Dave, that little 4 pin connector on the gps is a nmea 0183. It's a serial data interface, used to send the location data to another device. Back in the day (1993), I had Loran c on my boat, and we used the nmea 0183 port to send navigation data to the color (crt based) depthfinder screen. It was pretty gnarly at the time!
+Tom Sawyer Don't forget it's also used to load maps and firmware! Good 'ol Mapsource. NMEA is fun for wardriving, too.
Ziginox Cool, I didn't realize that it was a two way interface. Good stuff. Watching Dave's video reminded me of how badass we thought it was back then, and where we are now! In terms of accuracy, power consumption, and real estate. I never bothered to hookup gps capability to my laptop for wardriving, Now that you mention it, I've got to add the lat / lon!
Tom Sawyer You can shave a few feet off with WAAS-capable units, but these old 12-channel units still are very close. (16 ft III+ versus 13 ft GPSMap 60Cx) If you have an Android smartphone and your laptop has bluetooth you can use GPS2Bluetooth to send NMEA sentences over a bluetooth serial port as well.
Ziginox I like your solution. Only thing is, I've got an old (~2005) garmin gpsmap 76. It's a 12 channel, waas capable. It does ok, has 0183, but no bluetooth. None of my laptops has a serial port, and I don't have an Android smartphone, so looking to get a modern handheld gps, waas and bluetooth capable. Let me know if you have a preference on a handheld gps, as you know, there are quite a few out there! Thanks.
USB-Serial adapters generally work well enough for these, especially if you're only doing NMEA data. If you happen to have an E-series Latitude, Dell makes a little wedge with serial and parallel ports that sticks on the bottom.
Man, it gives me the willies as you wield that knife about
I thought the motherboard was pretty sweet, my wife was less impressed.
+Sci-Twi Where she learned that quote? Because my girlfriend uses similar one...
The "OsziFOX" wasn't a fail, since the iscilloscope was produced in germany, here we all oscilloscopes "Oszilloskope", short "Oszi".
+MrJumpersun
"Oszilloskop" actually.
No, we call oscilloscopes "Oszilloskope", but we call a single oscilloscope "Oszilloskop" ^^
+MrJumpersun I would also say we say often "Oszi" instead of Oszilloskop = oscilloscope ;)
Nearly all those gps devices had 386 processors in them. I think it had to do with the developer kits for circuit designers for the proprietary gps chips came with 386 based diagrams, since the satellites themselves had 386 processors on board.
Sweet! Man, I never get old watching these video's. Great stuff.
Watching the mailbag is the best procrastination any engineering student can have.
I have always found electronics interesting, and I was first introduced to you back during the solar roadways. I found everything you said so interesting and you obviously knew exactly what you were talking about unlike some many people on TH-cam (or in real life).
I am now applying to become an electrician apprentice thanks to you.
+The9gods That doesn't make a lot of sense... electricians do completely unrelated stuff. Wiring houses, servicing appliances, etc.. sure you don't mean electronics engineering?
I realize he is an engineer, I am just saying he inspired me to go out and do something. In this case an electrician. It was he knowledge of all things electricity (circuits, equations, and overall knowledge). I see bullshiters everywhere and Dave is one of the few people I have seen who really knows what he is talking about. I don't know a lot about circuits or amps/ohms/volt, but I do know enough to spot surface level bullshit. And Dave kept amazing me by showing me how little I really did know. I have used what he has talked about to show others around me the lies people try and sale them (Batterizer/solar roadways). I hope this clarifies what I meant.
Ah that GPS brings back memories. My first receiver was the II Plus (no mapping of any kind) bought sometime in late 90s in the days before GPS Selective Availability was turned off. Prior to SA deactivation (May 2000) geocaching was a huge challenge!!
Thanx, Dave, for this one :)
Especially these PerfBoards - ordered 10 of them....makes little designs very easy to setup. :)
love the batterizer joke on the end. been very quiet from them latly.. 5 monts on their youtube "fan" page.
That AMD mobo is a beast, 1TB of RAM and up to 64 Bulldozer cores. I think it's still the best you can get in Opteron, at least until Zen finally drops.
+Saberus Terras That thing will heat your whole house and dim your neighbors lights too.
I know. But the Intel equivalent Xeons would do the same. These came out just before a massive reduction in power requirements and heat production in the new(er) models. And that power to heat ratio drop couldn't come soon enough, with so many datacenters switching to blade servers, the higher density would have been murderous to keep cool otherwise.
When you showed the corroded battery in that yellow meter, I nearly fell off my chair laughing. Pre-installed battery haha!
Wow, the prototype board seems to be really handy.
Garmin has always rolled their own GPS chipsets. The principal founder of the company, Gary Burrell, was an electronics engineer who developed the first practical portable GPS receiver at Magnavox.
Those yellow multimeters are free at Harbor freight. They give crap away coupons to get you in the door. I usually just get the led flashlights anymore. Yes they come with battery included. when I go to flea markets they have bins full of crap like that. they try to sell them for a couple bucks each.
What, did the multimeter shipping container from China fall in the ocean and have to be fished out?
I instantly recognised the remote from the CD walkman/burner hybrid, my old "netMD" minidisc player has the same remote. It seemed so advanced at the time with it's USB dock etc but it aged VERY quickly against emerging flash and HDD players. Still have it somewhere though, gorgeous sound quality.
Love the pre-leaked battery! Guess that was a Harbor Freight reject!
I've got one of those ZMD 407 scope probe IC's sitting here on my desk (fell out of a box onto the floor recently).
I had looked at building a Compaq iPaq Pocket PC "sleeve" scope using one... back in the day, it seemed like a good idea!
They sell both of those multimeters on local chinese-run shops (Spain, but I guess it's the same everywhere). Also crappy irons and way-too-thick (2mm) rosin core solder.
I keep one of each around, nice enough for messing around with and for low voltage jobs.
On the analog one, notice how they reuse the cut out of the label on the front. That's efficient design and use of materials!
I have done a couple mods to the yellow meter:
The leads are absolute crap (and rated at 1000V!), I replaced the wires on mine once they broke with some ATX PSU ones.
Also added a female barrel conector for those 9-12v wall warts with a filtering electrolitic cap (No diode or anything) Good enough to run it without the battery or charge the one inside a bit when the low battery indicator goes up.
I once connected one directly to 240V AC mains in DC 20V mode (Shorted though laptop power adapter). Once my heart rate went back to the double digits, I checked it inside. A trace near the lead connectors had acted like a fuse, and the dial had gone sooty. The wires where hot. It would not turn on. Other than that it was fine. To the trash and bought a new one, it only cost me three euros fifty, no big deal. The battery itself was fine, odly enough. That trace fuse did its job splendidly.
I also have a "Powerfix Profi" (Lidl Supermarket chain own brand). Made in Germany, cost under twenty euro, fairly good quality. It would be great if you did a teardown/review on it, I would send you mine but I am partial to keeping it.
Thanks for supporting the channel!
Interesting story about those Necco Wafers... We have tollway systems here in the US. You basically have to stop every so often and pay for using the highway. Here in Illinois, a Chicago radio DJ discovered and announced that Necco Wafers could be used in the toll machines instead of coins. As you can imagine, the DJ got in trouble and the tollway system had it's own set of headaches trying to clean all the sticky machines and modifying them to reject the candy. The DJ's name was Steve Dahl. You can google it. It was quite a debacle
Thanks, the server motherboard specs is really impressive. I like to make one myself for simulation purposes if it is not very expensive.
I just got a RadioShack Probe Scope. it has a separate ground connector, you don't need to power it from the circuit under test. it's pretty nice for what it was/is. newer devices like to be annoying.
You would use 1TB of RAM for a VM host, SQL server, or file server. VMs use gigabytes of memory. Most VM workloads are I/O bound (reading/writing databases, and doing network I/O), so your main limiting factor for a VM host is memory.
@26:49 "Aw, the red zipper failed" - no sir, you did again... xD
Looking at these wonderful specs of that hybrid analog-digital meter I remembered I used to have one of tthese cheapie digital ones that in manual stated it has "3 1/2 inch digits" - that would be nice readability for pocket multimeter:)
That ProbeScope uses the small ground wire with the pin end to ground in the circuit under test. I usually power it with a 9v battery separate from the circuit. It does work, and works as a pen DVM.
Should add, the pin goes in the ground socket on the back of the scope. I've never used the external trigger option, but it connects the same way.
You have to take a look at Fujitsu Motherboards... all single side mounting, they know how to design a motherboard for minimum stress for components at reflow process.
Dave, what kind of phone do you have? Please make a tear down video of it!
It doesn't matter how many of these I watch, I flinch every time Dave slashes his knife in my direction
Last edit, I looked it up and well its a Server/Workstation Technology Extended form fact which is only used by Super Micro. Its size is massive at 457 × 330 and that its about 2x a normal ATX board (about 250 x 200 ish.)
Oh god a Sunma was my first multimeter. Shame on me
That motherboard would be so nice to have, prefect for running all the VM test labs I need to run..
Many of those DC/DC converters are multi-phase using up to 12 inductors per voltage rail
i would cut out a piece of clear lexan to use as the face of that IBICO calculator to show off that beautiful vacuum tube!
Id imagine that the rubber grommet things on the shielding of the walkman would probably be there to minimize vibrations to ensure you don't mess up your disks.
love that i386 QFP chip in the GPS, you should cut i a SDRAM to see the multi-layer PCB layout and maybe explain a bit about the making process of those things (macro lens will come in handy)
you opened that up and I knew exactly what it was, it is actually a sister or cousin of the KGPE-D16 I am using now with a max of 64 cores something like 128+mb of CPU cache and something like 4Tb of ram, you can actually see the cut out where the Pike would go, which is a special RAID controller for these AMD boards.
The company who made the Probe Scope, Wittig Testelektronik, is still around, and they have a successor to the Probe Scope (original name osziFOX) called the KeyScope.
Looks like a SSI MEB size board. Have a few older quad Opteron boards somewhere taking dust.
When it comes to ruining a single pin on those motherboards from my experience the processor still works with two broken pins. Not sure what sort of a performance hit it takes but I didn't notice anything.
I love that analogue meter..Best job of cost cutting and parts reduction I have ever seen...Would love to of seen it trying to measure 1000 V..
I wanted that "scope" probe SO BAD when I was young! XD
Sony burner/player: the downside is the cd media changes alot over time so it's unlikely new blanks will burn right with it's current firmware. you probably want to look for the hard-to-find 640-meg cd's and not the standard 700-meg ones.
I had to full-screen it to see the label for your Jamaica Plain. That's out in the Boston area, about 3.5 hr drive from me.
Ok, the Böblingen question is probably thoroughly answered already. I had one of those Sony discman-burner-thingies, and my kids used it in its discman personality until the lid lock broke (and even a bit after that, with a rubber band to hold the lid in place). The probe scope - well, I wouldn't want to count too much on that 5MHz effective bandwidth advertised on the box, given that the serial connector isn't even specified for more than 20k bits/s (at least in the original spec from 1969), and the highest I've seen from RS-232 is 230k bits/s. 5MHz, yeah. And the shrink-wrapped multimeter with the crusty battery... well, at least it only cost 60 cents :D
Leaky mercury battery. Sounds like fun!
+Megabobster mercury??? where there is mercury
+TM80 NotGoodWithNames Just in case, assume the worst.
One can not trust that thing
I didn't notice it was mercury but it wouuld be as amalgam, so the mercury could be on that metal
TM80 NotGoodWithNames
Nah I don't know if it is or not, just like: it's leaky and random battery, on a meter that costs less than a decent battery = stay away just in case!
TM80 NotGoodWithNames At the end of the video, that 9V battery that looks like crap (and is the thumbnail) says it contains Hg, aka Mercury. Could be amalgam, could be safe, I wouldn't even vaguely risk it and I would 100% avoid handling it and take it to hazmat disposal.
ive used the last analog multimeter for a grade 10 project where it was measuring current. it showed how relays take huuuge amounts of current comparatively with the 10 othet circuits (had 11 circuits on it each doing quite a diffrent job. all on one power rail with the switch on negative and this joke on positive)
it was also intresting to note that the Ti SN74LS08N And gate took almost 100 mili amps to operate a 15 mili Amp led!! (which I verified with my UniT ut61c to be 108mA, that meter being my first ever that I own and use!)
I wish I could send you some photos some day but ive got lots of stuff to do and the thing has seen better days than the teacher's basement...
in the industry we used to call that form factor "the monster" lol it goes in a clear top desktop style case i think and it remainds me of the boards with a split down the middle for redundancy but that looks all built in non redundant lol
Better a ¢60 multimeter, than none.
Couple comments on the motherboard:
The yield thing is exactly what I think of when I see these boards. OTOH, boards like this usually come in a few variations, with and without certain add-on features (like RAID, multiple NICs, etc.) So if the RAID controller ASIC doesn't pass QC, take it off and sell as a non-RAID version rather than scrapping the whole board.
RAM -- whaaat iiis it goood for (absolutely nootthhin). Two things, mostly: 1) Scientific apps, modeling, and big data. Keeps the dataset in memory. 2) Virtualization. With 4 multi-core CPUs and 1TB of RAM, you can virtualize your Active Directory domain controllers, email, web servers, applications servers, print servers, file servers, app servers, dev and sandbox servers, etc.
Interestingly, the more CPU/RAM you have, the less useful those multiple SATA ports get. At some point, if you're virtualizing 100 servers on one physical blade, you don't want your storage local anymore. Because that's too many eggs in one basket. You want at least two physical blades for redundancy and load balancing, which means you need the storage to be shared -- via iSCSI or Fibre Chanel for example -- on its own redundant storage array. This also allows the hypervisor to move a VM from one physical host to another, while the VM is running. (e.g., vMotion.)
Also, I don't know very much about AMD CPUs, and I haven't looked at this board in particular, but I would suspect those "north and south bridge" chips aren't that. North bridges have moved into the CPU for the most part because the CPU-to-RAM interface is getting too fast to decouple easily. Those ICs could be PCI bridges, RAID or network controllers, or more traditional south bridge tasks like USB, etc. I could be totally wrong, too.
it's a shame us humans can create such wonders soon to go landfill. motherboard is awesome. should be framed.
Hi Dave, that large motherboard form factor is probably SSI EEB (Enterprise Electronics Bay) which is common for workstations and servers.
@EEVBlog I also must correct you Dave - those two chips at the bottom (SR5690/SR5670) would not be considered part of the northbridge but in fact make up the southbridge. The northbridge is integrated onto the CPU die these days. AMD processors have a crossbar switch (think of it like a ethernet switch) with 3 or more links connecting the sockets and the southbridge - the southbridges will have one or more hypertransport links depending on the implementation - it's pretty flexible and how these are connected / switched depends on the implementation. The switching is configured by the firmware and includes the socket topology (node 0 connected to node 1 on link 1, ect.) But yea, what you would think of as a traditional northbridge (memory controller) is now on die sitting on top of that switching technology and those IO devices are considered southbridges or IO companion chips. ;)
(In fact - those wiggly lines / differential pairs you show on the underside going between the sockets are probably the hypertransport links connecting the nodes)
One use for a terabyte of memory is for in-memory caching, for instance using memcached.
Funny, in all the hundreds of packages I've opened, I think the pull-tab has only failed maybe once. They always work just fine for me...
Another year of goodies sent to you, and you'll need a bigger lab to store all your stuff. :-)
Jeez i think we have all been watching Dave for a long time lol. Been over ten years now...I'm getting old 😂
That protoboard is a decent idea, but what happens when I want to route more than one signal on one side of the chip? You just end up shorting all the pins together? You'd end up with the knife out anyway to cut away the connections. I'd rather just have a plain old double-sided protoboard, or get PCBs made. But good effort, and I hope someone finds it useful. I think it would be more useful in smaller pieces, so you can route out like an 8-pin dip or something.
+Aurelius R Oh no... he got it patented. FAIL.
I fell out of my chair laughing when you opened the 1000A multimeter. Need a couple for the lab, they are AWESOME!
1TB memory = good for in-memory databases and caches (Redis, Memcached,etc). That's assuming you have the I/O capacity to the network to support it.
Dave, since you like that RS Probe Scope so much, I guess you won't need your other scopes any longer. I have a good home that one could go to. :)
+EEVblog The scope is likely made by Keysight. They got a facility in Böblingen, Germany.
1Tb RAM is communally used on Virtualization Servers (Hyper-V, VMWare, etc)
I also know things like verifying chip designs take a lot of memory.
1tb of memory could easily feed several dozen virtual machines
That's exactly the type of thing servers with this amount of memory are used for
the sad part is I have a rebrand of that digital multimeter.. and it cost me ~$12 USD in my country
nice, i'm not the only one from latvia who watch you, greetings :)
Why would you need up to 1TB of RAM? Virtualization host (for running multiple virtual machines).
I love that long life 6F22. A thing of beauty
That knife is crazy overkill for opening packages. Absolutely hilarious :)
Would have loved to see more of that printer, preferably in action. It deserved more than 2 screen seconds.
That backsword !) its loooks too heavy in your hand.Thank you !
I still have one of those probe scopes. Haven't used it in years.
Böblingen is a city in Germany.
Haha I lusted after one of those Tandy probe scopes back in the day. Probably just as well I couldn't afford one, as I would certainly have poked it somewhere I shouldn't xD
Have to say... I kinda want one of those scope probes!
awesome mailbag, 10/10
Now I knew how my name would be pronounced in english, thanks Dave. Ike is quite right. The "e" at the end is pronounced "a" , like the indefinite article. Greetings from Hamburg.
You pronounced Senegal perfectly the first time.
I live in Canada and never heard of Nekko wafers until a few years ago from my Yank friends. I love candy, so I was bummed out that they're not sold here. Then finally a couple of years ago I found some in a store with specialt imported candy. I absolutely loved them! Unfortunately I can't eat them anymore as a result of breakinh or losing most of my molarsand I think chewing them with my front teeth would be horrible. Still worth it though.
Well since you asked, a VMware environment would make good use of four multi-core CPUs and 1 TB of RAM. These days, the ratio of VMs to physical servers has gone through the roof.
Böblingen is a city near Stuttgart. Actually about 20km from where I am right now xD
+therealpanse seems like they're still around... www.wittig.it/
DT-830 you say? I had one of those! Gotta love the 10A UNFUSED input! That's a shocker (literally)! XD XD :D :D
Not pretty sure that server mainboard is totally scrap. At least just one little capacitor fault could render the whole thing unstable and buggy.
You should load up the software for that radioshack scope thing and test it out.
what do you do with a big old failed motherboard that size,do you part it out?
I've had a thing for combo portable CD-ROMs / CD players since the MediaVision Reno. I had no idea Sony made one in the early 2000s. Cool. :-)
The US (or NTSC) standard has a whole additional 10FPS
Supermicro have their own "standard" motherboard sizes
my first response when I saw that motherboard: FINALLY AN AMD BOARD :D
funny how wikipedia page about 386EX shows exactly same board
what's with the colour wheel @ 35:51 ? i don't see what it does other than add internal bling...?