DSO 138 Oscilloscope Kit Open Source with Probe 2.4" TFT 1Msps Digital Oscilloscope Kit with DSO 138 Case + Probe 13803K for Electronic Learning Set

Given the quality of the other documentation for this device, the lack of instructions to build the case is strange. That fact is why I dinged this product for "beginners". So, after figuring out the case build (mostly and after a couple of attempts) is a drag, but the unit is functional, and it would make a good "first scope" for any bench -- or even an easy grab when dragging out the full size/featured scope seems more work than is needed at the moment. Cover the hardware on the bottom of the built case because that is a live ground and putting the unit on a conductive surface can let out the magic smoke. Recommend.

I have a $400+ Siglent four channel oscilloscope, and two of these little little things. Guess which I use more often! (Laughing!) The Siglent is on the active equipment shelf in my lab for more demanding work, while the little scope travels with me. The second one is dedicated to my music synthesizers and such. They are disposable, good for higher risk situations.The case... I just use the top and bottom plates with the longer sides spacing them, leaving the switch sides open. Given the poor case design, it is easier to use if you leave all that crap out. And I only peeled the paper off the top plate, less chance of static that way.

I didn't except much for this price but the item works as intended and the screen is surprisingly good.There are 2 significant issues:(1) The device does not work on 9V transformers, a 12 V supply is required. The instructions explicitly state that a 12V supply should not be used because this will cause overheating, so I'm not expecting a long life for this device.(2) The Plexiglas housing design for this device is terrible. If you are actually willing to send the time puzzling out the build (no instructions of course) you will find that the I/O prongs are now buried under 4 layers of Plexiglas , making attachment without bending the prongs very difficult. My advice; throw it all away except for the base plate and use the nuts provided to make stand offs with the screws as legs.If you are determined to use the Plexiglas plates provided; the small plate with the irregular cutouts is intended to go on the back of the smaller PCB with the screen mounted on it. This PCB must be pulled off the prongs on the larger PCB and then the Plexiglas plate mounted behind it. You will have to bend the caps and transistors to fit in the slots cut once remounted on the larger PCB. The other two smaller Plexiglas plates (with the long slots) now mount on top of the small PCB and the whole thing sandwiches between the two larger plates in the final box. But like I said; its not worth the effort.

The oscilliscope itself - fine, does what it should, passable, can easily be found cheaper without the case.The case - oh my god what an absolute nightmare this thing is. Like a lego kit from hell. The instructions are trash, and even if you follow them, parts of it make no sense and it ends up being weird and janky. I've taken it apart probably 3 times now because the buttons are so finnicky they barely work. Save your money and buy this without the case, I promise you it works fine with no case and it is not worth the hassle.

Had it worked. I would have enjoyed the compact size.Out of the box:No instructions for the case assembly.More switch levers and not enough button levers. Had to Mc.Guyver one to put it togeter after searching an hour for a YouTube how to vid.Bought the pre assembled board. Wish I hadn't.Lcd is broken.Over all. Had I bought the to be assembled kit. It would have made a good solder practice item.Very cheaply made toy.

This was a fun kit to build, and surprisingly, it works and is reasonably accurate for what it is.

Totally bummed me out man. I was looking forward to the kit and it came assembled alread.ok no problem but then after the plastic box assembly “situation” go to power it and the screen is cracked.👎Update!I returned the busted oscilloscope and they replaced with a solid one.I look forward to exploring wave shapes in the future.Here’s a pic of a decent sine wave, not bad👍

This 'scope arrived quickly and I was surprised to find that the PCB was fully assembled and ready to power up. I was expecting a kit that I would need to solder together. It booted fine, but sadly, the trace was stuck at full negative deflection both with the input floating or tied to common. I just packed it back up and returned it.