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Product details

Is Discontinued By Manufacturer ‏ : ‎ No
Package Dimensions ‏ : ‎ 5.9 x 4.1 x 1.5 inches; 1 Pounds
Date First Available ‏ : ‎ December 10, 2015
Manufacturer ‏ : ‎ kuman
ASIN ‏ : ‎ B0195ZIURK

Best Sellers Rank: #235,025 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
- #163 in Lab Oscilloscopes

Customer Reviews:
4.2 569 ratings

Product Description

Kuman DSO138 oscilloscope is partially open-sourced. This opens the possibility for users to add different features or develop new applications on the hardware.

DSO138 oscilloscope DIY kit Major features :

Analog bandwidth: 0 - 200KHz

Sampling rate: 1Msps max

Sensitivity: 10mV/Div - 5V/Div

Sensitivity error: < 5%

Vertical resolution: 12-bit

Timebase: 10us/Div - 500s/Div

Record length: 1024 points

Built-in 1KHz/3.3V test signal

Waveform frozen (HOLD) function available

9V DC (8 - 12V acceptable)

Supply Current: 120mA

NOTE: 9V DC power supply required. Not included.

Dimension: 117mm X 76mm X 15mm

Weight: 70 gram (not including cables)

Features:

DSO138 kits are sold in two configurations. One is with all SMD parts pre-soldered (PN: 13803K, replacing 13801K).

The other is with only the main IC (the MCU) pre-soldered (PN: 13804K, replacing 13802K).

The latter serves also as a SMD soldering training kit.

For both configurations the MCU has been pre-programmed and no re-programming required.


	5 MHz Handheld Digital Oscilloscope	DSO 138 DIY Kit	DSO Shell Oscilloscope DIY Kit	Mega 328 Graphic transistor Tester	100:1 High Voltage Probe	2 X 100MHz Oscilloscope Clip Probes
	See Details	See Details	See Details	See Details	See Details	See Details
Customer Reviews	54	569	164	729	48	56

DSO138 DIY Kit Open Source 2.4" TFT 1MSPS Digital Oscilloscope Kit (SMD pre-soldered)

Dso138 2.4" Tft 1msps digital oscilloscope kit for DIY it's easy to solder.
Oscilloscope functions with no fancy features. Simplicity in structure and easiness in assembly.
It uses 2.4-Inch tft lcd (320 x 240 dot-matrix, 262K colors) as its display element and displays nice.
Detailed assembly instructions are provided in combination with troubleshooting guide and schematic.

What's in the box

Oscilloscope

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Customer reviews

4.2 out of 5

569 global ratings

How customer reviews and ratings work

Customers say

Customers like the quality, ease of assembly, completeness and value of the precision measuring kit. They mention that it's a fun two-evenings project, the instructions are very readable and detailed, and that it works great for the amount you pay. They also like the appearance. However, some customers report issues with the readability of the color bands.

AI-generated from the text of customer reviews

150 customers mention117 positive33 negative

Customers like the quality of the precision measuring kit. They say it's fun and experience gaining to build. They also say it works fairly well at this price point and that it turns up from the first attempt.

"...investigate more when I have time but overall the scope seems to work fairly well at this price point and even though the wave form is not drawn as..." Read more

"...; the screen is surprisingly readable; and the functionality is as described. The documentation is minimal, but clear and accurate...." Read more

"...After fixing that and some of the more dodgy soldering, it works flawlessly! I am amazed! It's been a great project to learn about oscilloscopes...." Read more

"...(if you have a battery clip); several time scales; most relevant measurements displayed; open-source (full schematic included)..." Read more

124 customers mention93 positive31 negative

Customers find the instructions for assembling the precision measuring kit very readable, detailed, and fun to assemble. They also appreciate the troubleshooting guide and full schematic with voltages. The manual is clearly in real English and only has a few typos. It helps with the installation and the build goes smoothly.

"...The Manual was clearly in real English, and only had a few typos.- Schematic was included-..." Read more

"...Once tested and sorted, the assembly instructions were detailed in most cases but it would have been nice if they included the values printed on the..." Read more

"...; the screen is surprisingly readable; and the functionality is as described...." Read more

"...amazed I didn't make any critical mistakes and that the parts were 100% exactly as needed - no spares, none missing - and they all worked properly." Read more

65 customers mention51 positive14 negative

Customers like the completeness of the kit. They say it has all the promised parts and is a good kit for most electronics hobbyists. They also say the manual is quite complete and the illustrations are clear. Customers also mention that it's a great little kit to build an oscilloscope and that it comes with plenty of parts.

"...What I liked about it:- The Manual, though brief, was quite complete, and the illustrations were excellent.-..." Read more

"...critical mistakes and that the parts were 100% exactly as needed - no spares, none missing - and they all worked properly." Read more

"...Let me break it down for y’all:The Good: dirt cheap; kit form; full color TFT display; nearly pocket-sized..." Read more

"...The kit was complete with all promised parts. I spent one evening organizing the parts...." Read more

35 customers mention27 positive8 negative

Customers like the value of the precision measuring. They mention it's easy to build, works great for the amount you pay, and is a good cheap way to try one out.

"...Schematic was included- Very good price point for something with this functionality.-..." Read more

"...Overall, for such a low price, it was a fun project and you actually get an oscilloscope you can use for hobby work...." Read more

"...but I thought this product warranted one because it is a GREAT value for the money. A lot of reviews mention that some components are out of spec...." Read more

"...Yes, it’s a super cheap working oscilloscope. But it’s also a super cheap oscilloscope, which comes with lots of limitations...." Read more

13 customers mention13 positive0 negative

Customers are satisfied with the appearance of the precision measuring device. They mention that it has a good design, a nice screen display, and is pretty cool. Some say that the illustrations are excellent. Overall, most are happy with the purchase and recommend it for students.

"...The Manual, though brief, was quite complete, and the illustrations were excellent.-..." Read more

"...All in all, a very impressive piece of work -- highly recommended for students or hobbyists who can't justify spending hundreds of dollars on a..." Read more

"...a bit of existing skill the whole thing is a blast and the DSO is frighteningly nice, given it cost $24 plus some time assembling it, and printing a..." Read more

"...It seems to be pretty cool" Read more

19 customers mention7 positive12 negative

Customers have mixed opinions about the accuracy of the precision measuring device. Some find it accurate enough to assist in diagnosing most automotive signals, audio, and it makes calibration a breeze. They also appreciate the full-color instructions, calibration instructions, and schematic with measurement values. However, some customers say it's very erratic, not the most accurate, and noisy.

"...1. It has just a single trace, and the probe is just a BNC connector with alligator clips. Voltage limit is 50 volts peak-to-peak...." Read more

"...There's a test signal header on the board as well, which makes calibration a breeze...." Read more

"...When I first powered it on, it worked only sometimes. Very erratic. But after studying the connections, I found one I had missed...." Read more

"...Usually resetting helps this. Resetting doesn’t help the inconsistent triggering though. Sometimes it just refuses to trigger...." Read more

15 customers mention5 positive10 negative

Customers are mixed about the labeling. Some mention that the board is labeled beautifully, while the individual parts are not. They say the testers make identifying all the resistors super easy. However, some customers say the components are not labeleded and the hardest part is identifying the resisters.

"The comments make a lot of noise about the unlabeled parts. That is, unfortunately, true. The kit is a baggie full of loose parts...." Read more

"...The board is labeled beautifully, but the individual parts are not...." Read more

"...make sure to have a multimeter because the resistors can be a pain to read and is much easier just to use a multimeter to find the values...." Read more

"...The hardest part is identifying the resistors...." Read more

21 customers mention4 positive17 negative

Customers find the color bands and color codes of the precision measuring instrument difficult to read accurately. They also mention that the markings are hard to read, even with a good magnifier. Some customers also report loose parts and unreadable resistors.

"...The resistor color code just doesn't work. So, expect to spend a good amount of time sorting out the resistors with a multimeter before starting...." Read more

"...This was causing the zero reading at the test point...." Read more

"...The color codes are unreadable.Assembly time including three cups of coffee and a few smokes was 3 hours for me...." Read more

"...The Good: dirt cheap; kit form; full color TFT display; nearly pocket-sized (please don’t carry it in your pocket); actual BNC probe connector; can..." Read more

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Ocean Engineer

Well done kit

Reviewed in the United States on August 14, 2016

Verified Purchase

I have literally just finished building and playing with this, so this review may change with time. I think this is really cool product. I got it for my 10 year old son who is seriously into electronics. We built it together (almost), but because it is not as simple as some kits we have worked on, he soldered the resistors and a few other things, and I did the rest. Our first step though was to use a DMM to sort out the parts which came jumbled in a plastic bag. We taped the resistors and capacitors to a sheet we made, identifying them on the sheet by value and reference designator. This was good practice for my son, but from my standpoint, having the parts come in a single bag was not a plus. When time for testing it did not work the first time, but I examined it for bad solder joints etc. and touched up one resistor and one pin on the display and it fired right up.
When it was finished he hooked it up to a piezo buzzer and tapped it, then the sound generator in his IPod. He enjoyed it thoroughly.

What I liked about it:
- The Manual, though brief, was quite complete, and the illustrations were excellent.
- The Manual was clearly in real English, and only had a few typos.
- Schematic was included
- Very good price point for something with this functionality.
- Good quality components and circuit board.

What I didn't like:
-No 9V power cord. I would like to see the kind that connects directly to a 9V battery with the other end connecting to the barrel type Power Connector supplied.
- Parts all came all tangled together in a plastic bag.
- The plastic bag did not appear to be anti-static.

I would call this a kit most appropriate for someone experienced, only recommending it for someone with good soldering skills and some electronics experience, or at least a patient friend with those attributes.

Certainly not a replacement for some of the low price real scopes that are on the market now, but fun and educational. I have not tested it to the specs, so I can't say it meets them, but so far it has worked very well.

12 people found this helpful

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Waslost1

Good project but only if you have decent soldering tools and are not a beginner.

Reviewed in the United States on April 24, 2017

Verified Purchase

I am fairly experienced with soldering and assembling kits. I am not an electronic engineer but I wanted a scope to experiment with that didn't break the bank. First of all, this is not something I recommend for a firs timer nor would I suggest this if you do not have a good soldering station, the kind with adjustable temperature controls and fine tips. The soldering is challenging in some areas and cheap tools will end up frustrating a beginner to no end. That said, I spent some time sorting out the parts, checking all the values with my meter and prepping before the assembly started. This is time well spent as the parts are so small you can't read the color bands and markings easily. Once tested and sorted, the assembly instructions were detailed in most cases but it would have been nice if they included the values printed on the disc capacitors rather than expecting you to go online and look up the marking system. Minor gripe, but still, it would have been nice. I spend a an hour or two at a time working on it till it was completed. I probably spend 6 or 7 hours total getting everything assembled. I plugged it in and followed the test procedures in the instructions. Everything checked out so I bridged the solder jumpers and installed the screen, powered up and it came to life about as I expected (or hoped it would anyway). I connected to the built in 1khz test signal and got a trace. It wasn't a perfect square wave though, it was more rounded on the rising edge. I tried adjusting the adjustable caps but there seemed to be little or no change when I rotated them. I resoldered every joint and the results were the same. I suspect the variable caps are not working properly and will investigate more when I have time but overall the scope seems to work fairly well at this price point and even though the wave form is not drawn as well as it should be, it is close enough for learning purposes. At least now I can experiment and eventually decide if I want to invest in something more lab ready. I am glad I bought this and built it, I would recommend to anyone who has decent soldering tools and a solid understanding of how to sort and test components.

One person found this helpful

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