Reddit reviews DSO Nano V3 Pocket-Size 32-Bit Digital Oscilloscope Kit USB Rechargeable 1Msps 0-200KHz 10mV/div with 2.8" Color TFT LCD Waveform Storage and Playback 6 Triggering Modes Built-in Signal Generator
We found 4 Reddit comments about DSO Nano V3 Pocket-Size 32-Bit Digital Oscilloscope Kit USB Rechargeable 1Msps 0-200KHz 10mV/div with 2.8" Color TFT LCD Waveform Storage and Playback 6 Triggering Modes Built-in Signal Generator. Here are the top ones, ranked by their Reddit score.
【Pocket-Size】The DSO Nano V3 is a pocket-size compatible 32bit digital storage oscilloscope. Based on ARM-M3, it's equipped with 320*240 color display, features a firmware and an embedded 2 Mbyte storage chip, USB port with recharging function. It's compact, simple to operate; meets the basic demands of school lab, electric furniture repairment and electric engineering.【Features】Portable and lightweight | Color display | Waveform storage and playback | 6 triggering modes | 200Khz Analog Bandwidth | Complete measurement markers and signal characteristics | Built-in Signal Generator | Accessories available.【Technical Details】Analog Broadband: 0-200kHz | Max. Sampling Rate: 1Msps 12 bit | Sampling Storage Depth: 4096 points | Transverse Sensitivity: 1uS/Div~10S/Div(1-2-5 stepping) | Vertical Sensitivity: 10mv/Div~10V/Div(x1 probe) 0.5V/Div~10V/Div(x10 probe) | Input Resistance: >500KΩ | Max. Input Voltage: 40Vpp(x1 probe) | Inbuilt Test Signal: 10Hz~1MHz(1-2-5 stepping).【USB Rechargeable】The DSO Nano can be powered by the internal 500mAh LiPo battery or by the external mini-USB port. Charging takes about 2 hours 20 minutes to reach 4.12V. A brand-new unit can only run about 1 hour by the battery, but the battery life will be extended after the LiPo battery is fully charged.【Tech Support】Visit >>Seeed Wiki<< from Seeed Studio official page for more tech support and tutorials.
Are you in college? Or is there a nearby college you can make friends with? This is the sort of equipment they should absolutely have on hand.
If you're able to transport yourself, this may be a great place to look: https://www.electronicsfleamarket.com/schedule
Otherwise, I've no experience with these, but you might check out standalone units like this: https://www.amazon.com/Handheld-Oscilloscopes-DSO-Nano-V3/dp/B015X6LZFO
There's also stuff like this where you might be able to get more bang for your buck if you're able to supply a computer: https://www.electronicproducts.com/Test_and_Measurement/Benchtop_Rack_Mountable/Top_7_PC_based_USB_oscilloscopes_of_2017_for_hobbyists_makers_and_pros.aspx
Or go the engineering route and DIY: https://hackaday.com/tag/diy-oscilloscope/
I use an O'tool module for a scope which I like because it's a lot smaller than the Mordax. You can probably score a used version 1 pretty easily.
There's also this:
https://www.amazon.com/Handheld-Oscilloscopes-DSO-Nano-V3/dp/B015X6LZFO
There's a cheaper version of that somewhere as well.EDIT: Found it. https://www.adafruit.com/product/468
This one is the newest version. Needs a firmware update, but once you get update, it works great.
You might ask /r/audiorepair to see if anyone has a lead on a schematic. Make sure the output relay is clicking and try using the front/rear channels as well. In cases like this it helps to have an oscilliscope to probe the signal as it goes through the amp and see where it stops. I have a $85 DSO Nano V3 specifically for this and the fact that it's battery powered helps keep things safe since there is no path to ground.
Cool, those ESS have Heil AMTs. Sounds like a good project.