4/12 C64 repair using a great $57 portable oscilloscope (ZEEWEII DSO1511G review)

Рет қаралды 289,512

Жыл бұрын

#c64 #commodore #repair
On today's video, we have another C64 repair. This time I'm going to be using a very inexpensive portable oscilloscope which I bought from AliExpress for a total of $57 shipped. Will this cheap scope be good enough to help me fix this computer?
0:00 Intro
1:21 The ZEEWEII DSO1511G
17:26 C64 Repair
40:09 Summary / Outro
43:28 Bonus footage
Episode 1: kzfaq.info/get/bejne/q56blLp9z83MmYk.html
Episode 2: kzfaq.info/get/bejne/qKh9ormnvtSoeXU.html
Episode 3: kzfaq.info/get/bejne/oaqXkppqx87dqHU.html
Episode 4: This episode!
--- Video Links
ZEEWEII DSO1511G Oscilloscope
Purchase links (As of Oct 2022)
www.aliexpress.us/item/3256801783387968.html (currently $62 USD)
Epictronics repairing one of my C64s:
kzfaq.info/get/bejne/fth1rNylusCVf2w.html
Epictronics KZfaq:
kzfaq.info
Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spring.com/
Adrian's Digital Basement ][ (Second Channel)
kzfaq.info/love/btwi4wK1YXd9AyV_4UcE6g
Support the channel on Patreon:
www.patreon.com/adriansdigitalbasement
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.1602/.f
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- Instructional videos
My video on damage-free chip removal:
kzfaq.info/get/bejne/jreGndqB2LyqlGw.html
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino

Пікірлер: 609

@Epictronics1 Жыл бұрын

Thanks for the mention Adrian : ) It was good fun meeting you and repairing the number 6 Commodore. It sure had an interesting fault! Never seen any Commodore like it. Looking forward to fixing the number 4 board : )

@oldguy9051 Жыл бұрын

You certainly produced a nice repair video out of that one!

@Epictronics1 Жыл бұрын

@@oldguy9051 Thanks. It was good fun : )

@adriansdigitalbasement Жыл бұрын

I put a link to your repair in the description. And here: kzfaq.info/get/bejne/fth1rNylusCVf2w.html (When I uploaded this a few weeks ago, you hadn't yet published yours.)

@Epictronics1 Жыл бұрын

@@adriansdigitalbasement Thanks Adrian, Looking forward to repairing the other board, I hope it has some weird and interesting fault too : )

@Ramdileo_sys Жыл бұрын

@@adriansdigitalbasement cheeper than the dso-151??............ dso-138 with the JYE firmware update ;-) ..........

@meko1896 Жыл бұрын

Now that brings back memories. I had 2 repair centers in the early 80's and I specialized in the Commodore 64 and Amiga Computers. Worked on literally thousands of 64s. Bought ram chips in quantities of a thousand at a time and had custom PLA's programmed in batches of 500 at a time. Also built several hundred power supplies that I sold thru my store. Many memories! Glad to see they are still around. Thanks for the stroll down memory lane.

@00Skyfox Жыл бұрын

For being a C64 repair video, I love that the little oscilloscope has a RUN/STOP button.

@robertleemeyer Жыл бұрын

This is all your fault. I had to immediately order that scope because it's just what I've been waiting for to fix MY old C64. Your channel is awesome!!!

@Scubagon Жыл бұрын

The C64 repair videos are great, and the 8-bit dance party just makes it that much better!

@lwillms38 Жыл бұрын

I was blown away by the protection value. Love the multiple camera views and clear troubleshooting process. I've repaired several and sometimes it does devolve to chip swapping. Great work saving another one!

@martinortega9279 Жыл бұрын

Really liked this video. I liked that everything was real time from out of the box to troubleshooting, repair and retesting not only the C64 but putting the O-scope through the full test. I have been looking for scope and had no idea that there are portable scopes at this price. Thank you for making this video and will look forward to more in the future

@ninefingerdeathgrip Жыл бұрын

That actually looks like a really handy oscilloscope for automotive fault finding. Cheap enough to buy one to throw into a toolbox. My old analog scope is pretty cumbersome in automotive applications.

@MrStillions Жыл бұрын

Thats actually a really great point.

@Graham_Wideman Жыл бұрын

Some scope is better than no scope, but... much of the merit of a scope in automotive diagnostics is to see the relative timing of two or more signals. For example, cam-crank correlation, or crank vs spark and so on. So two channels are, in my view, the minimum requirement, and there are some two-channel inexpensive hand-held scopes. But a single channel is still good for looking at an individual PWM signal, or an ABS wheel encoder etc.

@cheater00 Жыл бұрын

Yes, or elevator or lighting repair

@OzRetrocomp Жыл бұрын

I have what appears to be the same scope (only under a different name and without the AV out... d'oh!), and can confirm that it's useful for automotive applications. It'll never be a substitute for a proper bench scope, but for casual use or applications where a bench scope is impractical, this is infinitely better than not having a scope at all.

@TrapperAaron Жыл бұрын

@@Graham_Wideman u make an excellent point here. It's not that useful without at least 2 channels for comparing data. I suppose w USB C u might be able to capture data and compare it outside the scope, but definitely a pain in ass. Would definitely pay an extra $20 for an extra channel.

@KuntalGhosh Жыл бұрын

A very important thing u have to be careful with this scope is that the ground of the probe and composite is certainly shared. So if u have the composite plugged in somewhere then u have to be super careful with where u stick the ground. Any mistake can kill the scope or tv.

@adriansdigitalbasement Жыл бұрын

Almost certainly the USB ground is also shared, so that's another danger if testing AC things.

@nickk6109 Жыл бұрын

Same with a normal scope through - best use a HV differential probe.

@KuntalGhosh Жыл бұрын

@@nickk6109 battery scopes have the advantage of being floating so u don't need a differential probe.

@orion310591RS Жыл бұрын

Could you elaborate this for beginner level? What means ground of probe and ground of composite? What is composite? What means composite plugged in somewhere? What scenario is considered "mistake"? Thanks for answers in advance.

@genki0 Жыл бұрын

@@orion310591RS kzfaq.info/get/bejne/rsd1f9Ry1JrPm4U.html

@tony359 Жыл бұрын

The "please" after "Remove the probes first" message in the calibration menu! Impressive! Jokes aside, indeed a very impressive little scope for the money you paid. Great video as usual, always learning something new! Thank you!

@McTroyd Жыл бұрын

Hey, high-end scopes don't say "please." I'd count that as a feature. 🤣

@tony359 Жыл бұрын

@@McTroyd Indeed! "Polite user interface" :D

@kurt1391 Жыл бұрын

I bought the scope based on the review. It's really nice for the price. The manual is actually well written and brief enough that you can find what you want quickly without also being too brief. I find the screen is easy to read (with reading glasses if you're older like me), and navigating the menus is simple. The up arrow to go sideways is weird, but I got used to it.

@fred.chapman Жыл бұрын

👍🤩👍 Adrian, I had no idea oscilloscope reviews and computer repairs could be so riveting, but yours are! Time just flies by. This is the fourth scope review of yours I've watched, and it prompted me to buy the dual-channel ZEEWEII DSO2512G on Ali Express for only US$78.48 after discounts, tax, and free shipping. It's amazing what you get for the money! Thanks so much for all you do. 🙏💖

@GenerationAI2024 Жыл бұрын

This is a great way you have captured the footage. I like that i can see you, the oscilloscope and what your probing :) Thanks for sharing

@DrTeddyMMM Жыл бұрын

I managed to source a few coupons and grabbed a scope for $45!..Sweet!

@nobuckle40 Жыл бұрын

Great scope review. I was just speaking to a friend, the other day, about scopes and how expensive they can be. Also glad to see that you got the C64 repaired so quickly. Thanks Adrian.

@Stefan_Payne Жыл бұрын

Yeah, more bread bin repair videos! Nice! I miss repair videos in general, can't get enough of them.

@OzRetrocomp Жыл бұрын

I've been using an earlier version of this scope for a couple of years now (the AV output feature wasn't available when I bought mine). It's perfectly fine for diagnosing and fixing vintage stuff as long as you're measuring below 30MHz, and is ideal for a casual user or newbie that can't justify the big bucks on a bench scope right now. That being said, it's not a bench scope substitute, but it's more than adequate if you have realistic expectations of what it can do. Thanks for the great practical reviews of affordable gear, Adrian. Long may they continue.

@monad_tcp Жыл бұрын

as a newb I loved it. bought one

@markesys Жыл бұрын

I also have the earlier version, and find it to be a perfectly serviceable oscilloscope. I keep in in my tool bag for field work. Adrian didn't exercise the scope thoroughly enough to check the frequency response. Mine is only rated for 100 MHz, not 120, but when I used my HP 8654A signal generator, it had no problem getting to 100 MHz. In fact, the issue I found was a small increase in sensitivity (a bulge in the frequency response curve of about 15%) above 90 MHz, which it seems likely to me is a result of the "100 MHz" probe rather than the instrument itself. Still, this scope was easily good enough to make my list of "cheap test equipment that's actually pretty good".

@brussell2932 Жыл бұрын

WOW! It is not enough to say that I am merely impressed. That is spectacular! Well done. Well done indeed! And now, about the scope and the review. Again, well done! I really like how you explored it and reviewed it using real world troubleshooting techniques. Frankly, most of them are at least a bit (no pun intended) over my head, but you explained the scope so well that I learned a lot from watching your review. Thank you Adrian!

@markwiehenstroer2831 Жыл бұрын

I'm impressed with this miniscope. But even more, I'm impressed with the presentation and chapter layout of this video. I'm now a subscriber and look forward to viewing more of your videos.

@George-jy7op Жыл бұрын

Thanks for the pocket O-Scope review which, is how I got to your channel. I really appreciate an educated quick review from someone in the know.

@GeorgeWMays Жыл бұрын

Good one Mr. 8. I personally like having small test devices on my desk while the big stuff stays on the bench. I'm always grabbing for the transistor checker, LED tester, battery checker, small DMM, a small scope, function generator, and the TinySA all get used. I keep all of that stuff in a plastic shoe box size bin in arm's reach of the desk. The dog appreciates these as well because I don't have to keep getting up from the desk to get something. It really is amazing how such handy little guys have become so compact and inexpensive. Thanks for the video. It's appreciated.

@eirewind Жыл бұрын

Great job teach. Your really smooth, your video presentation is stellar and your showing your experience and efficiency. Hard to Beat, Thank You Tom

@michaelmadore4855 Жыл бұрын

Used to repair Commodore in the late 80's this video brings back memories. Thanks for doing these videos!

@sp277 Жыл бұрын

First time in the channel. Great video! Thank you.

@Alkimi Жыл бұрын

that was awesome. i learned a ton and really enjoyed watching you do all that.

@apeterson23 Жыл бұрын

So good! Love the way you troubleshoot

@GREGGRCO Жыл бұрын

That's a neat scope !! Good trouble shooting ! Thanks so much !

@johnpenner5182 Жыл бұрын

love to see how you apply analytic method to isolate the PLA by clipping the lead to isolate the problem. nicely done! ✨

@johnelectric933 Жыл бұрын

Followed the link to the product. They fixed the price. There is also dual channel version for $81 plus discounts on both. Looks great, thanks for the find.

@craigrotay3732 Жыл бұрын

Adrian, you are totally freaking awesome dude.

@markw4164 Жыл бұрын

Like the scope reviews. Keep them coming!

@JakeBirkett Жыл бұрын

This was a really awesome piece of detective work on the PLA. Loved the pin clip trick.

@durandalgmx7633 Жыл бұрын

6:26 "It stands up pretty well!" **pushes it over with his finger trying to push the buttons**

@danlscan Жыл бұрын

Thanks! Great presentation.👍

@josephjorgensen3282 Жыл бұрын

I really love watching the c64 repair videos. I learn allot

@ronniejr1969 Жыл бұрын

Great video, screen shots and instruction.

@johndaniel9424 Жыл бұрын

Thank you for your help! It works perfectly!

@warwickgibbons6277 Жыл бұрын

A minor comment about your reference to the lack of sockets used on the Commodore 64 board. My first "PC" was a Nascom that I bought in the late 70s. I can't remember if it was the model 1 or 2. I bought it second hand from the person who had built it, from a kit, using sockets on virtually every chip and it was completely unreliable. Several friends also bought them and every one built with sockets was unreliable and every one soldered directly worked perfectly. It led us to formulate the "Law of PC Boards": "Using sockets to mount digital chips makes it 10 times easier to repair faults BUT makes the occurrence of faults 10 times more likely". I completely stripped every socket off the board and rebuilt it using direct soldering and it worked perfectly for many years. Thoroughly enjoyed the video. Brought back memories of when "building" a computer meant a double sided PC board and a plastic bag full of components not buying a few pre-built boards and connecting them together.

@MattPlachecki Жыл бұрын

Thanks for the oscilloscope review! I picked one up for $65 including tax. I’m hoping I can finally diagnose my Apple II Plus 😊

@adriansdigitalbasement Жыл бұрын

Good luck!

@phoenixgaming746 Жыл бұрын

very interesting and very informative video regarding this portable oscilloscope and has a really cool feature Adrian I really enjoyed hearing your individual thoughts/views on the c64 being tested using this portable oscilloscope Thanks for sharing the above informative and technology video with us all on here, its greatly appreciated by me so thank you Best regards Tony

@byteforever7829 Жыл бұрын

Great video again, love the handheld scope

@jdmcs Жыл бұрын

The pink LED matches the EasyFlash boot screen. Nice! Also, another great C64 repair!

@stevelester6276 Жыл бұрын

C64 repair really takes me back! Late 80's, tiny repair shop, do 4 or 5 every day. My goto diagnostic was a game cartridge, just by close observation I could determine the faulty chip about 80% correct

@mikefr24 Жыл бұрын

I love your repair videos Adrian. I have learned so much about electronics troubleshooting from them. I also bought one of these tiny oscilloscopes off Amazon like you have and they work great! I have fixed a NTSC C64 and an Atari 800XL with it. For the money they are a deal for what they can do for 8 bit repairs. Another option to fix the LED in the EASY FLASH CART is to drill a larger hole in the case so it can move around? Thanks again for sharing your knowledge with everyone.

@treschlet Жыл бұрын

"lets get right to it" *intro animation* "alright before we get started..."

@Mr.Thermistor7228 Жыл бұрын

such a cool video and excellent demonstration on the use case for an oscilloscope and the type of problems it can help you solve. im a diesel mechanic and all out gearhead and i am somewhat recently finding the urge to expand my skillset to a deeper level, for lack of a better term lol. i want to learn about the more intricate and detailed and exact way of how and why certain components do what they do. i cant seem to find the right words to get my point across but this video is exactly what i ant to learn. things like electrical currents, frequencies, the components on pcb boards i want to learn how it all works at that level, i find it so interesting. thank you for also giving a really good demonstration on how you can utilize an oscilloscope and actually interpret what it is displaying. i was having trouble wrapping my head around the general concept of an oscilloscope and what exactly it does and ive been trying for a pretty good amount of time about 2 months at least. your video finally made it click in my head and i feel i have a really good understanding on what exactly they do and what type of problem they can used to solve for. thanks man i am definitely subscribed

@hernancoronel Жыл бұрын

Thanks for the video Adrian! I was just yesterday thinking about getting a small oscilloscope for troubleshooting mains voltage appliances due to the danger of using mains connected scopes with such appliances. Keep up the great work!

@adriansdigitalbasement Жыл бұрын

Yeah battery powered is much safer on mains -- although I would be wary still. You could get a 100x probe (For cheap) which I would feel a bit better using with this on mains, especially if you're in 240v land.

@TheEmbeddedHobbyist Жыл бұрын

For mains troubleshooting the best thing to have is an isolation transformer.

@markuspooch8224 Жыл бұрын

So, pink is the new red… Thanks for this great video and the sid music at the end… As kid of the c64 time i‘m addicted to this kind of music

@parrottm76262 Жыл бұрын

That scope is so surprising. I recall the first scope I ever saw very long ago. No one was allowed to touch it except the guy trained on it. It was super expensive (think it was a Tektronix). Amazing how far that tech has come.

@Wtfinc Жыл бұрын

where was that? I would have touched it and probably tried to open it. A scope is the kind of thing where if in a room full of techs, all the techs will be trained to use such a tool, not just one guy, nor would just one guy be allowed to use it in a room full of over smart toddlers. Just saying, doesn't sound like a great environment wherever that scope was you speak of. I could understand if it were a scope today, so light and expensive can be swiped off a table onto the floor by accident. not the iron cabinet full of glass they used to be. imagine being the guy who knocked over one of those big scoped on a cart with racks on racks of tubes, shattering when they slam the ground

@parrottm76262 Жыл бұрын

@@Wtfinc This was when I worked at Boeing. It was in the QA/QC department.

@3dsmaxrocks699 Жыл бұрын

I snuck in later that night and touched it, singing la la la la!

@daveparker4415 Жыл бұрын

Tektronix is THE scope company. I was a calibration technician, and most of the scopes I calibrated and repaired in the military were Tek scopes. They're great.

@jgunther3398 Жыл бұрын

i can say exactly the same about the first 386 motherboard I ever saw :)

@dash8brj Жыл бұрын

Whatching you bop along to Cybernoid II was awesome - one of my favourite SID tunes :)

@frankmc4294 Жыл бұрын

I came to look at that scope and was interested in your commodore repair too. Took me back 40 years to when I was repairing Sorcerer Exidy Z80 computers in the UK. Thanks for the trip down memory lane !!

@marshr32 Жыл бұрын

Great video, I'm definitely going to have a look at those little scopes! Not sure if someone else suggested it already (and I guess you probably thought of it) but you could drill out the LED hole on your cartridge to stop the stress on the LED legs when plugging and unplugging.

@lozD83 Жыл бұрын

Seems reasonable for the money. Just ordered one off the back of this video. Figure it'll suit my needs. Thanks for the demo 👍

@stevekoehn1675 Жыл бұрын

Thanks Adrian. All the enjoyment of debug without the "work"

@horusfalcon Жыл бұрын

"It freakin' works!" 😆 That does look like a cool little o-scope. Thanks for putting it through its paces.

@8bitmark530 Жыл бұрын

Interesting video I’d assumed these would be no use when looking for my first (cheap) scope. Having seen your video I’ve now ordered one to try and fix my C64 that’s been driving me crazy :-). Thanks for a great video

@michaelohiggins9178 8 ай бұрын

I really enjoy your videos. In 1980 I bought a North Star Horizon (Kit) Z80A 4MHz S100 bus with 64k ram, 2 Micropolis 77 track 5 1/4 floppies, CPM 1.3, a VT100 terminal, and a Centronics model 101 printer. I thought I was a computing god! Friends came from as far as Seattle and Medford just to bask in its hum! I've been hooked ever since. TRS-80's, Atari's, you name it I loved em! I wish I had found you earlier as I lived in Portland for years. Much of that time I worked at FreeGeek doing tech support and repair. You would have been a great resource. Now I live in the Czech Republic. Just getting to know my way around. Lot of people using retro machines. If you need any Euro specific Items let me know. Cheers, Michael

@orion310591RS Жыл бұрын

36:22 - just put led closest possible to board, and use drill to widen hole in plastic for LED. Also a little bit of hotglue would help board stay in place. EDIT: After this video, I decided to buy this oscilloscope, and its the first one I have in my life. Its way easier to see how PCB works now, way way way easier and better to understand, just poke around probe and you see all in real time. Thank you for making this video.

@JohnLRice Жыл бұрын

I was thinking the same. 😎👍

@barry7608 Жыл бұрын

Thanks, gave you a thumbs up and subscribed. Sadly you are a couple of levels above me but your detail gave me enough to follow. So much to learn and great review.

@adambourne5523 Жыл бұрын

Your getting good at this Ade!

@rickdorsey72 Жыл бұрын

Thanks for trying this out. I've wanted a cheap oscilloscope for quite a while and just ordered one today. Looks like they fixed the price, I paid just a bit more than $50.

@sophiad4297 Жыл бұрын

This is amazing video with a lot of great helpful works very you.

@JohnLRice Жыл бұрын

Great job! 👏

@dimitrioskalfakis Жыл бұрын

useful and in-depth review.

@jj74qformerlyjailbreak3 Жыл бұрын

Hey thanks for helping me get over my fear to probe. That’s a great product right there.

@fluffycritter Жыл бұрын

I feel like this is the first time that one of those included pop-stands is genuinely useful. As far as these cheap little eBay oscilloscopes go this one seems pretty good! Also I'm surprised to see that it's not on the same F/OSS stack that so many of these are.

@Z-imon Жыл бұрын

I'm getting one of these Phone Ring Holders lol. Great video. Thank you

@neilbarnett3046 Жыл бұрын

@27:00 Or thereabouts, "...see if it's hot..." reminds me of mending a daisy wheel printer in 1985, I couldn't work out what was wrong, none of the usual culprits, but as I gently pressed the PCB, thinking of a broken track, I found a really hot chip. A quick swap and it was fixed!

@patrickdonegan9559 Жыл бұрын

thanks - exciting and informative video.

@Torbjorn.Lindgren Жыл бұрын

They also have a 2-channel model with signal generator (2512G) which also has a marginally larger screen (2.8" vs 2.4") for not that much more. Drawbacks with that model compared to this is that the signal generator output and USB gets moved to the bottom to make space for two oscilloscope inputs at the top - so it won't stand up with any of these connected. I've been looking for someone I trust that has tested one or the other, I have to say it handles it a lot better than I was expecting... Not sure whether go for the $62 single channel or the $86 dual channel yet, most of the time a single channel works as you've demonstrated.

@adriansdigitalbasement Жыл бұрын

Yeah -- 2 channels can be useful but it's far less useful. I find myself using two channels maybe 5% of the time during repairs. The price creep is real -- it's easy to keep spending a little more to get a much better device .... that's the danger. The $160 Hantek portable scope (And the Owan version, which is probably a bit better) is far superior to this, but it's that thing about the creep. If it's something that will almost always just end up in a drawer only being used very occasionally, just get the cheapest one possible.

@catcam Жыл бұрын

Thanks for outro !

@Brettski777 Жыл бұрын

You don’t need a scope to mend C64s , you just use the force ! Great work as ever Mr Black. ❤

@Brettski777 Жыл бұрын

A prize for me. O wow , I cant wait to send you my personal details over to you !!

@whitehedr Жыл бұрын

Based on your experience using the ZeeWeeII scope I bought the two Channel model. They stiffed me on the ring stand. The two channel scope seems to work just fine. Thanks for showing us the device. ROG.

@jamesdarlack4898 Жыл бұрын

Wow. Wish I had saved some of my old early made computers, TRS-80, CPM machines, etc. Truly, I have learned a lot today. Many thanks!

@stevemcknelly5036 Жыл бұрын

That'd be a great starting oscilloscope to have for retro repair streamers/CCs. Thanks for the review!

@johnmiller4859 Жыл бұрын

Great video. Thanks.

@jkeelsnc Жыл бұрын

Nice little oscilloscope. It’s amazing what it can do for the price. When I was in technical school years ago I remember using tektronix 20mhz analog scopes. Of course, those were dual channel and built like a tank. This one is great for a tool box and It even came with the yellow rubber baby buggy bumper. Video output is a great thing . If I had a problem with my C64 this could be useful.

@ruediix Жыл бұрын

I'm half tempted to see if I can get one of those back rings for my phone. Those are nice.

@GREGGRCO Жыл бұрын

This is a surprisingly good tool for $56 ! I'd make a 600 ohm shunt across it. Use it for level checking troubleshooting. See if it can read in dBm ?

@charlesreid9337 Жыл бұрын

ive owned a few (used) scopes as a hobbyist.. all but one i think a tek. My favorite honestly was a dirt cheap old 20mhz 4 channel brand id never heard of

@jussikuusela7345 Жыл бұрын

I have understood that the SID was produced in a process that is better suited for analog circuitry than digital, and this presented some difficulties in making its digital workings accurate as in meeting uniform trigger voltage levels both inside and between individual chips consistently. Especially the first four revisions that operated on 12V and yet took TTL level input. I may be wrong and will be happy to be corrected.

@JLMtime Жыл бұрын

This was great im still learning and was able to follow you completely thank you for going little more in detail compared to other videos ive seen.. uff i threw away so many c64s I bet they could have been repaired

@kuro68000 Жыл бұрын

Something like this, or maybe one of those scope meters that has a multimeter in it as well, is really handy for debugging and diagnostics. While it might not be super accurate or have 4 channels, for just getting a quick look at a signal to see if it's there and looking reasonable is all you need a lot of the time. Being small and portable it's more handy than a full size scope. I can believe the 500Ms/sec spec. 500Ms/sec ADCs are pretty cheap. In fact it's probably a 1Gs/sec ADC running a bit slower for power saving or because the CPU is a bit weak. Even very low end budget scopes sample at 1Gs/sec now. 120MHz bandwidth is dubious though, as you said. Thanks for reviewing this scope.

@bruwin Жыл бұрын

It's literally the price of an okay logic probe. If you can consistently get it for around $60 I see no reason buying a logic probe over this. It gives enough info to be useful even if you can't trust the accuracy.

@johndododoe1411 Жыл бұрын

I wonder where you find 1 Gsps ADC chips cheaply. Last I looked, I only found slower ADC chips in the catalogs.

@kuro68000 Жыл бұрын

@@johndododoe1411 China

@donaldblakley6796 Жыл бұрын

Sweet!! Thanks bud

@jimfischer4703 Жыл бұрын

Just found your channel! Thx much!

@TalmadgesArcade Жыл бұрын

time stamp 36:20 - Put a little hot glue on the corners of the board before closing the easy flash case. Then it won't wiggle and stress the led legs. Wow, found this video by accident. So cool and random,. you made my day. I hope to be you when I grow up :) Thanks

@RndomFX Жыл бұрын

good video and content. appreciated.

@scottlake5280 Жыл бұрын

Thanks for this intro to this scope. I’m buying the two channel version for diagnosing my Ensoniq VFX synth, which by the way that synth company was founded by engineers that left Commodore

@thomasbland6428 Жыл бұрын

Looked for this on Geek/Wish and found the DSO2512G dual channel version instead for about $108. The specs and features looked about the same though when it came to the 120 Mhz bandwidth, it mentions this drops to 60 Mhz when in dual channel mode. As for the 2511, it might have been interesting to see exactly what was displayed when the music spectrum FFT was selected and the SID was playing the test songs.

@rawberg_se Жыл бұрын

Great video Adrian! i'm a C64 youtube repair-video-holic so it was a nice surprise that you had a C64 repair in this video too.

@mUbase Жыл бұрын

Again Adrian, you're so lucky to be in the States. A bargain price for that oscilloscope ! It would definitely come in handy for work (portable) and for use on my synth gear t home. :) As always ;) Great video. Thanks !

@pascal8300 Жыл бұрын

I like your "cheap oscilloscope" tests! 🙂

@bb-ov3pi Жыл бұрын

I use to repair C64, VIC20, and C128 back 30 years ago. I also programmed them for people. I also had a C64 briefcase machine that I used at work.

@IanSlothieRolfe Жыл бұрын

The 120MHz bandwidth probably refers to the analogue bandwidth of the input stage. If you want to see a 10MHz square wave, you need to have an analogue bandwidth high enough to see enough of the harmonics to form the wave shape - typically at least 5 times the fundamental. So if you feed in a 100MHz square wave it will display a 100MHz sine wave, because the input stage will not be able to handle the harmonics (This is something that catches people out with even expensive oscilloscopes). Also, with 500MSpS each cycle will only be 5 samples, so you wont really see much of the sine waveform. Also, analogue bandwidth is usually measured to the 3dB point, i.e. the point where the signal displayed is half the ampitude of the actual signal, so you need to take that into account too. That said, you should be able to see reasonable square waves upto approx 25MHz which is good enough for most purposes in retro computing, unless you're fault finding something like an Amiga video stage. And of course you will see *something* up to much higher frequencies, although it might be increasingly tricky to spot timing or rise time problems.

@danman32 Жыл бұрын

Might be able to determine the bandwidth by measuring the displayed rise time of a square wave.

@kennethhicks2113 Жыл бұрын

Great find! Cheers fellow C64 people!

@ehiebert1297 Жыл бұрын

Thanks for the video. For the Easy Flash and your LED problem is drill the hole bigger so the LED has room to move around with out stress.

@rpk5568 Жыл бұрын

On cutting IC legs to isolate pin. I was a tech at Digital Equipment in 1969 and we used that to open the circuit. It came down to us that it was causing damage internally to the chip. Not sure how true that was, but I found another way, which was to suck the solder out of the plated thru whole and center the IC pin in the hole to isolate it. On the processor boards in an 11/45 any single data, address, or clock line went to several places and no single chip could ever be depended to fail. Interesting little scope, but I still prefer an analog scope.

@winstonsmith478 Жыл бұрын

WOW! An actually useful instruction manual.

@jcudejko Жыл бұрын

That's really an incredible little scope. I couldn't find the exact one you are testing here, but I found a duplicate on amazon listed for about 74 bucks. Screen and controls look exactly the same, but it is listed as the FNIRSI-5012H. I will be checking out your channel more over the next few days, thanks!

@johndododoe1411 Жыл бұрын

Did you receive it? Was it anywhere near as good as the one in this video?

@johncornwell1026 Жыл бұрын

Maybe it's just me, but: I have very little electronics background, and don't know how to use an oscilliscope, but I still watched this whole video. The explanations and pacing are so engaging, and I was able to follow a lot more of it than I thought I would. Thank you, Adrian!

@paulg3336 Жыл бұрын

Think of an oscilloscope as a graphic volt meter with Voltage change over time function

@charlesreid9337 Жыл бұрын

Ok so heres what an oscilloscope can do.. Measure >>anything