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DSO138 Upgraded 13803K DIY Digital Oscilloscope Kit


Color TFT LCD with 320 x 240 Resolution

Discount : 11% OFF
Additional Purchase Deal: For any Item Total over 60.00, purchase 1 Special Promo Item for 0.99, Discounts are automatically applied to your shopping cart before checkout. View Promo >>
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to United States  Via Flat Rate Shipping
  • Description
  • Product FAQ
  • Customer Reviews
  • Shipping & Payment
  • Wholesale Inquiry

DSO138 Upgraded DIY Digital Oscilloscope Kit 13803K Version for Measuring Waveform

DSO138 was designed as a training oscilloscope kit. Simplicity in structure and easiness in assembly / operation are among the main targets of the design. For these purpose DSO138 uses mostly through hole parts. The heart of DSO138 is a Cortex - M3 ARM processor (STM32F103C8) from ST. It uses 2.4 inch TFT LCD (320 x 240 dotmatrix, 262K colors) as its display element and displays nice and clear waveforms. Detailed assembly instructions are provided in combination with troubleshooting guide and schematc. Source codes are also available to allow user to add their own features.

Main Features:
● Significantly lowered noises
● Waveform can be saved to recall from non - volatile memory
● Enhancement in test mode with auto short-circuit detection capability
● Supports two types of TFT controllers (ILI9341 and ILI9325 / 9328)
● Coupling modes: DC / AC / GND
● 1Hz / 3.3V square wave test signal source



Model: DSO138
Suitable for: Arduino
Output Voltage: DC 9V
Analog Bandwidth: 0-200KHz
Vertical Sensitivity: 10mV / Div - 5V / Div (1 - 2 - 5 progressive manner)adjustable vertical displacement with instructions
Maximum Real Time Sampling Rate: 1Msps
Max. Input Voltage: 50Vpp (1:1 probe), 400Vpp (10:1 probe)
Input Impedance: 1M Ohm
Sampling Buffer Depth: 1024 Bytes
The Horizontal Time Base Range: 10 Microseconds / Div - 50s / Div (1 - 2 - 5 progressive manner)
Accuracy : 12Bit

Electronic Components

Screen size: 52 x 40mm
PCB Size: 117 x 76 mm

Weight and Size

Product weight: 0.120 kg
Package weight: 0.500 kg
Product Size(L x W x H): 10.00 x 5.00 x 2.00 cm / 3.94 x 1.97 x 0.79 inches
Package Size(L x W x H): 13.50 x 7.50 x 9.00 cm / 5.31 x 2.95 x 3.54 inches

Package Contents

Package Contents: 1 x DIY Digital Oscilloscope Kit


Customer Questions & Answers

  • By  Cidi Rome Feb-06/2017 03:02:40

    What is the max AC and DC voltage? I mean the voltage it is able to probe, not the voltage of the power supply. Are we able to probe 230V AC directly at mains power outlet or other other similar "high" voltages up to 1000 V like we can do with a regular Multimeter? Best Regards.


    Hello Cidi,

    The Simple probe of the item can be used to watch the signal within 50V.

    If you use the BNC probe, then you can watch the signal within 400V.

    The oscillo probe can not be detected.

    You can use it to watch the waveform.

  • By  tatiana Jul-06/2016 04:07:56

    if i buy "Welding" i dont have to weld nothing?



    If you buy "Welding", the item a semi-finished products,it just welding some patch,you still need to welding some part by yourself.

  • By  john matheson Jun-16/2016 04:06:57

    I received this item as a kit of parts and not a preassembled unit. How can I get the described preassembled unit.


    Hello john,

    Thanks for your inquiry. Partial products still need you to weld by yourself, even though you've chosen WELDING. Have a nice day.

  • By  ilker May-06/2016 04:05:23

    Why don't you send this item 'WELDING AS THE PICTURE' ? TWICE?


    Hello ilker,

    Thanks for your inquiry. Partial products still need you to weld by yourself, even though you've chosen WELDING. Have a nice day.

  • By  andreas Apr-08/2016 10:04:27

    Hello, What is the maximum DC & AC voltage?


    Hi andreas,

    Thank you for your inquiry.Output Voltage: DC 9V.

7 Customer Questions & Answers >

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Customer Reviews

Overall Customer Rating:

4.9 21 Customer Reviews

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  • Excelent for the price

    From Diogo Saraiva Apr 23,2017

    great product fast shipping good speaking


    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • ra

    From Koto Jan 06,2017

    Received the item as a kit with good packaging

    the price is good for beginner and practice for assembling

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • Buen dispositivo

    From Rosero Dec 31,2016

    Es un instrumento economico y muy util, con una relacion calidad a precio muy buena.

    Se debe tener cuidado con la descripcion pues no viene soldado como en la imagen, hay que ensamblarlo.

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • Good DIY Oscilloscope

    From J Nov 07,2016

    -The interface is pretty intuitive, despite its simplicity. -The manual outlines several test points before you add the LCD to make sure everything works. -The price makes this a very accessibly oscilloscope.

    - I wouldn't recommended for beginners

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 3

    Build Quality 4

    Usefulness 5

    Overall Rating 5

  • Self assembly oscilloscope

    From Nobody Oct 19,2016

    It is a good working low budget oscilloscope. It also comes with a handy external clamping cable. The assembly is pretty tricky at some point so decent soldering experience is adviced. Also a multimeter comes in handy for checking on the resistors.

    Assembly takes quite some time and the heat might damage a micro controller.

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

21 Customer Reviews >

Shipping & Payment


There are two key factors which will affect the time you receive your items.

Item processing time
After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.
Shipping methods
China Warehouse:
Shipping Type Country or Region Arrive within 1-7 Days Arrive within 8-15 Days Arrive within 16-30 Days Arrive within 31-45 Days Average Time (Days)
Unregistered Air Mail or Registered Air Mail United States 0% 20.8% 60.9% 5.13% 19.2
Spain, United Kingdom, Italy, Germany, France & Portugal 1.62% 41.09% 43.26% 5.71% 19.9
Netherlands, Greece, Poland 5.59% 44.44% 35.84% 13.00% 18.76
Russia 0% 11.20% 68.50% 15.80% 24.6
Japan, Korea 0% 21.30% 68.80% 9.66% 15.95
Brazil 0% 0.00% 17.96% 54.14% 38.6
Thailand, Singapore & Malaysia 0% 15.50% 45.75% 21.36% 19.03
Other countries 0.73% 40.41% 49.93% 8.92% 20.28
Priority Line United States 49.90% 46.30% 0.93% 0.06% 8.3
Spain, United Kingdom, Italy, Germany, France & Portugal 5.55% 74% 19% 0.38% 10.8
Russia 0% 0.75% 88.30% 9.05% 20.04
Australia 7.67% 86.60% 5.68% 0% 11
Korea 77.01% 21.40% 1% 0% 5.6
Japan 95.80% 2.09% 0% 0% 5.4
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8
Other countries 40.75% 49.96% 5.13% 0% 10
Expedited Shipping ALL countries(EMS) 39.85% 50.09% 8.96% 0% 9
ALL countries(DHL) 90.15% 9.84% 0% 0% 4.48
EU Warehouse: Typically 3-5 days to the UK, 3-7days to other European countries.
USA Warehouse:Generally, 3-7 days to a USA address.
ES Warehouse:Generally, 2-5 days to the Spain ,3-7 days to the Portugal.
Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.
Note:This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control.

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