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DIY audio scope - cheap

Discussion in 'General Electronics Chat' started by flat5, Mar 9, 2015.

  1. flat5

    flat5 Member

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    DIY Digital Oscilloscope Kit Electronic Learning Kit

    Features:


    Kits using ARM Cortex-M3 processor (STM32F103C8), and includes a 2.4-inch color TFT display can be used as ARM test development board.
    Available source, Capable people can be secondary development on the basis of the suite, for example, it can be changed to Millivoltmeter, data loggers, and so on (we don't supply any technical support about that).
    Circuit is simple and the kit is inexpensive

    Description:

    PCB size: 117 x 76mm
    Screen size: 52 x 40mm
    Supply voltage: DC 9V

    Characteristics of indicators:

    Maximum real-time sampling rate: 1Msps
    Accuracy: 12Bit
    Sampling buffer depth: 1024 bytes
    Analog bandwidth: 0 - 200KHz
    Vertical Sensitivity: 10mV / Div - 5V / Div (1-2-5 progressive manner)
    Adjustable vertical displacement, and with instructions
    Input impedance: 1MΩ
    Maximum input voltage: 50Vpp (1: 1 probe), 400Vpp (10: 1 probe)
    Coupling modes: DC / AC / GND
    The horizontal time base range: 10μs / Div - 50s / Div (1-2-5 progressive manner)
    With automatic, regular and one-shot mode, easy to capture the moment waveform
    Available rising or falling edge trigger
    Adjustable trigger level position, and with instructions
    Observable previous trigger waveform (negative delay)
    Can freeze at any time waveform display (HOLD function)
    Comes 1Hz /3.3V square wave test signal source

    http://www.banggood.com/DIY-Digital-Oscilloscope-Kit-Electronic-Learning-Kit-p-969762.html

    I bought one.
    (to be continued)
     
  2. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    Must admit, I've been considering ordering one (as they are so cheap :D) - but having just got a Rigol DS1052E I can't really justify it (cheap or not).
     
  3. flat5

    flat5 Member

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    It's something to build. Something to do. 20 Euros. But using 'points' it's 17 Euros.
    Last month I bought a piccolo for 51 Euros using points.
    Maybe I have a problem :)

    Nigel, is the fan bothering you?
     
  4. dave

    Dave New Member

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  5. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    I'm much the same, but I'm managing (so far) to avoid ordering that kit :p

    Not at all :D
     
  6. Musicmanager

    Musicmanager Active Member

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    Wish I had a fan ! :D





    with a DS1052E attached to it, of course !:cool:
     
    • Funny Funny x 1
  7. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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  8. Musicmanager

    Musicmanager Active Member

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    ...tastic ! Thanks N. :)
     
    • Like Like x 1
  9. debe

    debe Active Member

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    Just ordered one today should be quite handy.
     
  10. blueroomelectronics

    blueroomelectronics Well-Known Member

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    Just got a Rigol DS1074z-S myself, but I've ordered a DIY scope for the fun of it. Nigel, did you "upgrade" your DS1052E to 100MHz etc...?

    Also just got my M168 transistor tester, nice kit. Looking into updating its firmware using an Arduino UNO.
     
  11. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    I've pondered long and hard, and 'just about' managed to talk myself out of it! :D

    You're not helping here!!! :p

    No, there seems little point, although the option is always there if I want to.

    I've bought a couple of Uno's and Nano's to play with, basically because they were so cheap from Bangood, and to help with my latest push to try and learn C.

    Funnily enough, while I was waiting for them to arrive I've been asked to develop a project (which so far has earned me the DS1052E), so I'm using that as incentive to learn XC8 on a PIC 16F1827. So beyond trying the Uno's to make sure they work (one didn't and has been replaced), I've not had much time to play with them. I did get an Ethernet shield, as it seems a simple way to access both ways over the Internet - but again, I've only had time to confirm it works.
     
  12. flat5

    flat5 Member

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    Be careful, Nigel with the update. It worked on the scope a few years ago. Try to find out if it still is possible.
    I looked into it and I came to the conclusion that my revision number (or something) did not match the list of know ones that work.
     
    • Agree Agree x 1
  13. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    Yes, I read that later ones might not work, which is one reason I haven't bothered - although the increase from 50-100MHz isn't of much importance to me anyway.
     
  14. blueroomelectronics

    blueroomelectronics Well-Known Member

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    You may also get the math & decoders, or a brick. Dave on eevblog has instructions on his site.

    I'm getting more comfortable with XC8 and can actually code in it. Many libraries aren't available for anything below an 18F though.

    Today I was pulling my hair out trying to put updated firmware on that M168 Transistor tester same as yours. You apparently can use an Arduino uno as an ISP with avrdude but I'm dammed if I can figure out the fuse settings for a blank 328p. Mine came with 1.05, seems 1.17m is available. Arduino is nice to use, AVR not so much IMHO. Almost feels easier to port the code over to a PIC. :)
     
  15. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    Just to let you know - you've worn me down, I've just ordered one :banghead:
     
  16. upand_at_them

    upand_at_them Member

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    Hmm...Might be nice to have a cheap battery-powered scope like that. Let us know how you like it.
     
  17. flat5

    flat5 Member

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    Mine was finally shipped ~March 24.
    Techs just wanna have fun (building stuff).
     
  18. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    In my experience shipping usually takes about 2-4 weeks :(
     
  19. debe

    debe Active Member

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    I think mine might be on a slow boat from China.
     
  20. blueroomelectronics

    blueroomelectronics Well-Known Member

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    As is mine.
     
  21. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    Had an email this morning, mine has been dispatched :D

    However, packages from Bangood usually take from two to four weeks to arrive, presumably coming by boat?, but for free postage right around the world what can you expect?.

    The trick is to keep a steady stream of orders going, so you get parcels arriving every few days or weeks :p
     

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