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DORHEA

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

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Availability: Only 10 left in stock, order soon!
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Arrives Monday, Oct 19
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Features

  • This kit uses ARM Cortex-M3 processor (STM32F103C8), and includes a 2.4-inch color TFT display screen, can be used as ARM test development board.Can freeze at any time waveform display (HOLD function).Comes 1Hz /3.3V square wave test signal source.
  • With automatic, regular and one-shot modes, easy to capture the moment waveform.Available rising or falling edge trigger.Observable previous trigger waveform (negative delay).
  • With waveform parameter digital display, including frequency, period, pulse width, duty ratio, MAX./MIN./AVG./Peak-Peak/virtual values.Waveform storage function: will not lose the waveform after power off.
  • Partially open-sourced,the MCU has been programmed.The oscilloscope circuit boards components are pre-soldered, no need soldered by yourself.The case is unassembled and requires assembly.
  • Adjustable vertical displacement,and with instructions,which increase the likelihood of adding different features or developing new applications on the hardware for users.

Description

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) 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) Supply Voltage: DC 9V The oscilloscope circuit boards components are pre-soldered, no need soldered by yourself. PCB size: 117 X 76mm / 4.6 X 3in Screen size: 52 X 40mm / 2 X 1.57in The digital oscilloscope 2.4" TFT transparent acrylic case is unassembled and requires assembly. This case is a special DIY item and it include 9 pieces and 1 bags case accessories. First you need to peel off the protective film on the case. Then install according to the picture. 1 X Oscilloscope circuit boards 1 X Probe 3 X User manual (English) 1 X Digital oscilloscope acrylic case 1 X Oscilloscope circuit boards 1 X Probe 3 X User manual (English) 1 X Digital oscilloscope acrylic case 1 X Oscilloscope circuit boards 1 X Probe 3 X User manual (English) 1 X Digital oscilloscope acrylic case 1 X Oscilloscope circuit boards 1 X Probe 3 X User manual (English) 1 X Digital oscilloscope acrylic case Oscilloscope circuit boards Digital oscilloscope acrylic case Probe Manual The method of opening/closing waveform parameters display : Put the cursor at the time base position, and long press the [OK] key. Save waveform method : Press [SEL] and [+] at the same time. The method of calling out saved waveform : Press [SEL] and [-] at the same time. Method to enter the test mode : Press [OK] and press [RESET] button. If you see the LED flash quickly, it means that the PB or PC port of the single-chip computer (these ports contain the connection with the LCD) has a short circuit, which needs to be found and removed. If you see an LED flashing in a period of about 4 seconds, you can use a voltmeter to find possible openings in the connection lines related to the MCU port. Please refer to the instructions for details.

Package Dimensions: ‎7 x 6.9 x 1.9 inches


Item Weight: ‎10.4 ounces


Manufacturer: ‎DORHEA


Date First Available: ‎May 30, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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Top Amazon Reviews

    • Did not work on first try, but then it started without fixing anything!
Just finished putting the case together, which takes a bit of figuring out (no instructions), but it is not rocket science either. But then connected it to my regulated bench power supply (set for 9.1V), and nothing... I like electronic projects, so I will fiddle with it and try to revive it, but if I am ordering it assembled it is because I want it of work out of the box! I get that this is a cheap unit DIY unit and I was well aware of the case not coming together, but if I wanted to have to fiddle with it, I would have ordered the parts kit! EDIT: for some reason, 30 minutes after writing above review, I was going to start checking for problems, and the thing booted up when I connected the power. God only knows why it did not power up before, but it is working fine now! I tested it with a tone generator, and it is right on the money! So I changed my rating from 1 to 5 stars, because, for the money, there is not anything better! Great little gadget! I intend to use it to trouble shoot my guitar pedals and other electronic projects! ... show more
Reviewed in the United States on August 3, 2020 by Juan F Rabat Lince
    • Surprisingly Good
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. ... show more
Reviewed in the United States on January 8, 2020 by Bruschak
    • Manual included!
The built kit came with a Plexiglas case. It is nicely made but no instructions for it. So had to handle many time trying to build it correctly. This caused me to scratch the display area of the scope. Yes there are videos on the net that could have helped me but that was an after thought to me. I mess around with Arduino's and this is a big help in many projects. It is very inexpensive for this hobby to have. ... show more
Reviewed in the United States on September 30, 2020 by John
    • Glad It Worked For Some Folks
Oscilloscope board came assembled but description suggested I would solder it to completion (what I originally wanted). Decided to continue assembling the acrylic "case" and then test the pre-assembled scope. Well, there were no instructions for case assembly so I had to follow a YT video. On the way I discovered that two of the slider buttons on the scope board were broken off (I later found them in the bag the board came in) and one of the case panels was broken. Thus the unit was doomed even before I completed case assembly. Which never happened because I decided to test the scope before the case was completed. When I powered it on the green LED lit but I got a white screen with no boot up to a scope menu. That was the last straw so I requested a return authorization. ... show more
Reviewed in the United States on July 30, 2026 by ASG
    • The case is a nightmare and not worth it
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. ... show more
Reviewed in the United States on September 20, 2023 by adidiaia
    • The case has no instructions
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. ... show more
Reviewed in the United States on April 17, 2024 by Michael S.
    • Great little scope and frequency meter. Buy it! I have two.
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. ... show more
Reviewed in the United States on November 3, 2024 by javilk
    • Good for what it is.
It works great, but a couple notes. 1. It would not work properly with a 9v transformer. The test wave was unstable. I used a 9v battery and that seems to be just fine. 2. It was missing the wire loop for the test signal. Easy fix though. Really not a bad deal for an oscilloscope, but don't expect the quality or features of a unit that costs significantly more. Finally, be sure to configure and test before installing the Plexi case as it is all blocked once the case is on. ... show more
Reviewed in the United States on June 29, 2020 by J. D.

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