Products > Test Equipment
Vevor SDS1104 for first oscilloscope?
rhb:
I have the Hanmatek 2 & 4 channel versions, For analog scope work they are awesome. Think Tek 465 with the ability to save waveforms. Not suitable for serious MCU work.
The Hanmateks are an easy conversion to 2S LiPo.
Measured BW is 140 MHz.
Wish I could have bought one of these rather than USAF surplus Dumont 1062 I paid Tucker $325 for only to have it die a few days after the 30 day warranty expired.
Have Fun!
Reg
homemade:
Does anyone have a circuit diagram of the Vevor 1104 (or maybe a video tear down)?
I am curious if I can hack/swap the EPROM||chip or nand.
I want to know if I can grab the firmware and maybe read about because 20KiB is low.
I need to fix alot of DSP music equipment/[sound cards] because they don't make anything like them anymore. This looks like the perfect scope to do some frankenstein'ing.
tunk:
As mentioned above, most likely a rebadged Owon SDS1104.
No expert, but the 20kB may be in the FPGA, i.e. not expandable.
And if it's not, I guess you will have to hack the firmware to see it.
uhmgawa2:
--- Quote from: tunk on June 03, 2024, 02:02:42 pm ---As mentioned above, most likely a rebadged Owon SDS1104.
--- End quote ---
The Vevor SDS1104 is just a rebranded Owon scope of the same marketed model. Even the manuals are basically the same text and graphics. And it arrives with Owon OW3100 probes. Actually last month Amazon had the Vevor SDS1104 at $129 with a one shot 40% off coupon -- a 4CH 100Mhz digital scope for $77 bucks. It was pretty compelling at that price point given all my other scopes are analog behemoths (which IMO remain very much un-obsoleted by digital equivalents except in one metric). I wouldn't pay the constantly bobbling Amazon list price for the Vevor sds1104 hovering around $300 but Vevor appears to be still selling them direct for $149. Even at that price and with the proposition viewed as that of a utility scope I don't expect you'll find a better deal currently. It certainly has limitations most notably 8-bit A/D and a total of 20K depth shared among all enabled channels. But I've paid more in the past for a mediocre bench DMM so that gives some perspective on the bang for the buck. Oh, that one metric mentioned above is the thing weighs 2.36 pounds and (with a DIY VESA mount) can sit on the cheapest adjustable monitor arm which none of my analog scopes could ever hope to do. The unit is so light the IEC mains input seems comically out of place design-wise as you'll be fighting stiffness of the power cable to position the scope where you need it. Internally there is a universal 100~240 VAC 50/60Hz PSU board from which the IEC input and power switch poke out through the case. It supplies a lone 5V rail to the internal main board. I powered the main board from a bench supply and found it draws ~1.7A @ 5V0. So it could as well have been designed with a 5V buck regulator and nominal 12VDC input, then powered from a wall wart flyback (which opens up the possibility to support an integrated battery). There is more than enough room in the case for quite a few 18650 Li cells.
I'd really have to give a hat tip on the mechanical / physical design. It is surprisingly good for this price point and pulling the screws to pop the hood (a total of 6, 4 in the feet and 2 hiding under the handle) found those M3s sitting in brass insert nuts molded into the case. The case itself is quite well designed and manufactured. Wish they carried that thought through to include 4x M4 molded nuts in the back for a VESA mount but I'll likely just create a minimal VESA mount carrier for the unit with a grab handle projecting out from the bottom of the scope as a grab/positioning handle. Other stuff I haven't futzed with is the support for capture dump to a USB flash drive and the rear USB interface to a PC. There is a disk with windoZe software included but as a Linux user I'll be finding my own solution there if ever really needed. Some buyer reviews seem to indicate a misunderstanding the screen protection film which has an intentionally loose removal tab in the NE corner of the screen is some sort of screen delamination defect. I think I recall reading one cutting off the removal tab flush with the case and using it as such rather than understanding it being a prompt for the user to remove the glossy protection film. Unfortunate situation as when removed there is a much more readable and purposely provided matte screen surface waiting under it.
Anyone interested might want to keep an eye on Amazon to see if the price dips again. It seems to have been quite volatile recently.
--- Quote ---No expert, but the 20kB may be in the FPGA, i.e. not expandable.
And if it's not, I guess you will have to hack the firmware to see it.
--- End quote ---
May well be a FPGA limitation given the clip at which that data is moving. And I'd hazard at least 32-bit internal path given it can support 4x 8-bits @ 1Ghz. The option of PCB rework for a 1Ghz memory capacity bump likely left us at the turn of the century.
uhmgawa2:
--- Quote from: rhb on June 02, 2024, 01:07:38 am ---Wish I could have bought one of these rather than USAF surplus Dumont 1062 I paid Tucker $325 for only to have it die a few days after the 30 day warranty expired.
--- End quote ---
At least that appears to be a "solid state" scope. I can recall years ago as a lab TA in college having these battleship issue TEK scopes which were vacuum tube designs about the size of compact washing machine riding on what I'd describe to be a "heave-able" cart. The stock probes were truly a misfit for 100mil DIP era microprocessor systems, looking more like they'd been designed to securely glom onto a truck bumper. The one marginal benefit of those scopes was in the winter as supplement heaters thanks to those vacuum tubes. But they did the basic job with the imposition of an educated user. Dunno, at some point it may come to pass but I'm not inclined to part with any of my analog (user-intimately-on-the-wire) scopes any time soon.
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