Oscilloscope kits

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tvtimmy
    Badcaps Legend
    • Mar 2015
    • 1160
    • usa

    #1

    Oscilloscope kits

    Has anyone bought, assembled, and used one of these $20 scopes?
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31003
    • Albion

    #2
    Re: Oscilloscope kits

    julien ilet did on utube - you probably want to check that vid!

    Comment

    • redwire
      Badcaps Legend
      • Dec 2010
      • 3906
      • Canada

      #3
      Re: Oscilloscope kits

      I had to laugh, youtube vids of DSO-138's that died after running for a minute...

      https://jyetech.com/Products/LcdScope/e138.php
      "If you are thinking to purchase DSO138 it is suggested to consider DSO138mini. DSO138mini is an improved model of DSO138 with better structure, smaller size, battery powered, and more features. It also has a nice optional acrylic enclosure. The documents have recently been enriched with particularly those for beginners like troubleshooting guide and testing guide. Price for DSO138mini would be the same or lower than that of DSO138. "
      For details visit http://www.jyetech.com/Products/LcdScope/e138mini.php "

      I haven't run either, but not sure how useful a $20 scope is.

      Comment

      • dmill89
        Badcaps Legend
        • Dec 2011
        • 2534
        • USA

        #4
        Re: Oscilloscope kits

        I built one a while back "just for fun" it is ok for what it is (more of a "toy" than a "real" scope) but the QC concerns are definitely justified as it took me two kits to get one working unit (the first one just had a flashing black screen, I double checked all the connections and voltages so I suspect a bad IC), the one in your pic appears to be the pre-assembled ("welded", I.e. soldered) version so they theoretically should have tested it at the factory, while I got the kit version which came as a PCB and bag of components (which Amazon had on sale for $6 at the time, though it was an "add on item" so I had to make a $25 purchase to get it). With only a 200 KHz bandwidth it's usefulness is rather limited though.




        (Note the soldering here is mine, so if you buy the pre-assembled version it may be better or worse)

        Here it is in operation (along with the XR2206 function generator kit):


        And here it is compared to my "real" oscilloscope:
        Attached Files
        Last edited by dmill89; 02-02-2019, 07:56 PM.

        Comment

        • eccerr0r
          Solder Sloth
          • Nov 2012
          • 8701
          • USA

          #5
          Re: Oscilloscope kits

          200KHz (1MSps) is still good enough to deal with audio work.
          And perusing the original designer's site, the above post looks like that's a chinese copycat that the original designer is trying to get an injunction against and failing...

          Comment

          • dmill89
            Badcaps Legend
            • Dec 2011
            • 2534
            • USA

            #6
            Re: Oscilloscope kits

            Originally posted by eccerr0r
            200KHz (1MSps) is still good enough to deal with audio work.
            And perusing the original designer's site, the above post looks like that's a chinese copycat that the original designer is trying to get an injunction against and failing...
            Yep, if you buy one of these from eBay, Amazon, Aliexpress, etc. the odds of getting a copy are probably better then the odds of getting a real JYE. Banggood.com claims to be selling genuine JYE kits/units (though I don't have any personal verification of this) if that is important to you (I don't really support counterfeits but there is a certain irony in JYE trying to "protect" a largely open-source design, I suppose you may get better QC with a genuine JYE though).

            Comment

            • madan1
              Badcaps Veteran
              • Nov 2016
              • 682
              • Bulgaria

              #7
              Re: Oscilloscope kits

              I have one of those DSO138. Ordered it locally and got it working right after the assembly.
              As said above - good for troubleshooting audio equipment and power supplies.
              There are lot's of videos reviewing its features and limitations.

              Comment

              Related Topics

              Collapse

              • Tarot Superstars
                How not to Damage an Oscilloscope
                by Tarot Superstars
                Hello.
                I have jut got my first analogue oscilloscope. An Isotech 620 20MHz.

                I want to learn how not to damage it, and I found instructions on the internet obscure.
                They talk about ground, earth, floating ground, this, that....
                But they don't actually say anything anything useful so far.

                I want to know:
                Don't connect exactly this to exactly there or it blows up.

                For example, I am tracing a signal from a function generator in an audio amp, or testing for voltages in different parts of a circuit.
                I want to know what not to connect...
                08-29-2023, 02:27 PM
              • Evets
                Dynamco analogue oscilloscope
                by Evets
                I have recently acquired a Dynamco D7100 analogue oscilloscope without a user manual. As this is the first time I have owned or used an oscilloscope I would like to try and find an instruction book. The manufacturers no longer hold any information and a Google search only found one site but when I downloaded a 'service manual' all I got was gobbledegook. Any help would be gratefully appreciated or even pointers to a generic manual where I could learn more.
                08-30-2024, 06:54 AM
              • SolomonMan
                Vintage BK Precision 1403 Oscilloscope....
                by SolomonMan
                All,

                Some of you have helped me in the past and I am very appreciative of all the help! (I have fixed TVs/Stereos/ and other small appliances with your efforts...Thanks so much!!!



                Today I went to a local HAM Radio Festival. It was one of the smaller ones in our area. My stepfather is the HAM operator. I tinker in electronics but am a Software Programmer (27 years now).

                I was looking for a few odds and ends for some electronics work I have to do for the household/farm. Typically these type of shows have the grab bags or a electronics vendor...
                12-03-2023, 10:39 PM
              • Bartoloni
                Lenovo S145 -15iwl vcore inductor warm.. looking with oscilloscope there is a spike.
                by Bartoloni
                Hi, i have a Lenovo S145 that after 20 seconds shutdown and restart (it's working correctly on thse 20 seconds)
                everything seems ok, but on Vcore inductor ( this is an i3 with just 1 switching power supply for CPU)

                there is an output to teh CPU with a spike.. seems that inductor can't handle the input...
                replaced the capacitor (330) and the inductor (R15) without any change
                any idea? very thank you!

                input of the inductor seems as usual... only strange thing is that the upper/lower voltages seems to be 21V (main power line is 19.3) ... but not sure this...
                12-09-2024, 12:42 PM
              • repair-it
                AutoLeap Oscilloscope Handout
                by repair-it
                Searched online but wasn't able to find. Trying to locate a copy of this document - AutoLeap Oscilloscope Handout.
                11-18-2024, 10:09 AM
              • Loading...
              • No more items.
              Working...