Xprotolab Plain

The Xprotolab Plain is a multi scope board created by Gabotronics. It is the most inexpensive but feature rich oscilloscope in the market. It consists of a simple DIP module with a USB interface. Visualization of the signals and controlling the oscilloscope is done on the PC interface software (open source). The Xprotolab Plain is similar to the original Xprotolab, but doesn't have the display and buttons, so it only works with the USB interface. The board measures only 1 x 2 inches, and can be mounted directly on a breadboard. The Xprotolab can also be used as a development board for the AVR XMEGA microcontroller.

Package include

  • Xprotolab Plain (Connectors were soldered)
  • 10 x IC hook
  • Micro USB Cable

Documents & links

How to use

Xscopes Qt program

Build & Run

1. Install Qt packages


sudo apt-get update
sudo apt-get install qt5-default libqt5serialport5-dev libusb-1.0-0-dev
sudo apt-get --reinstall install libgles2-mesa


sudo apt-get update
sudo apt-get upgrade
sudo apt-get install qt5-default libqt5serialport5-dev libusb-1.0-0-dev

You must remove mali package before installing qt5.
Also need to update the system software with dist-upgrade first.

sudo apt-get update
sudo apt-get remove mali-x11
sudo apt-get install qt5-default libqt5serialport5-dev libusb-1.0-0-dev
sudo apt download mali-x11
sudo dpkg -i --force-overwrite mali-x11*.deb
sudo apt-get install xserver-xorg-video-mali
sudo ldconfig


sudo apt-get update
sudo apt-get install qt5-default libqt5serialport5-dev libusb-1.0-0-dev

You should add swap space due to its limited RAM.

sudo fallocate -l 2G /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile

After build, if you want to free

sudo swapoff -a

2. Get soure code

git clone https://github.com/ganzziani/xscopes-qt

3. Build

cd xscopes-qt
make -j5

4. Run

sudo ./xscope

5. Connect Xprotolab to your Board using micro USB cable.

6. Then, click “Connect” button in the “Options” tab on UI.

Other OS programs

Run without sudo

If you want to run the program without sudo such as desktop icon, you need to add following line into “/etc/udev/rules.d/10-odroid.rules”.

SUBSYSTEMS=="usb", ATTRS{idVendor}=="16d0", ATTRS{idProduct}=="06f9", GROUP="users", MODE="0666"

And then, reload the udev.

sudo udevadm control --reload

Oscilloscope echo test using AWG

1. Wiring

2. Select the waveform you want to get

H/W specifications

Pins description

Name Description Comment
+5V +5V Input voltage Do not apply +5V if using the USB port
+3V +3.3V Output voltage 200mA max output
GND Ground It is recommended use all ground pins to reduce voltage offset errors.
CH1 Analog Channel 1 Input range : -14V to +20 V
CH2 Analog Channel 2 Input range : -14V to +20 V
AWG Arbitrary Waveform Generator Output range : +/- 2V
EXT External Trigger Digital input, max 5.5V
Logic 0 Digital Channel 0 I2C Sniffer signal : SDA
Logic 1 Digital Channel 1 I2C Sniffer signal : SCL
Logic 2 Digital Channel 2 UART Sniffer signal : RX
Logic 3 Digital Channel 3 UART Sniffer signal : TX
Logic 4 Digital Channel 4 SPI Sniffer signal : /SS
Logic 5 Digital Channel 5 SPI Sniffer signal : MOSI
Logic 6 Digital Channel 6 SPI Sniffer signal : MISO
Logic 7 Digital Channel 7 SPI Sniffer signal : SCK

General specifications

  • Module size : 1.980“ x 1.01”
  • PDI interface
  • USB connectivity : Windows, Linux, MAC, Android

Oscilloscope specifications

  • 2 Analog inputs
  • Maximum sampling rate : 2MSPS
  • Analog bandwidth : 200kHz
  • Resolution : 8bits
  • Input impedance : 1MΩ
  • Buffer size per channel : 256
  • Input voltage range : -14V to +20V

Logic Analyzer specifications

  • 8 Digital Inputs, 3.3V level
  • Maximum sampling rate : 2MSPS
  • Frequency counter : 16Mhz
  • Protocol sniffer : UART, I2C, SPI
  • Internal pull up or pull down
  • Buffer size : 256

AWG specifications

  • 1 Analog output
  • Maximum conversion rate : 1MSPS
  • Analog Bandwidth : 44.1kHz
  • Resolution : 8bits
  • Output current : +/- 7mA
  • Buffer size : 256
  • Ouput voltage : +/- 2V
en/xprotolab.txt · Last modified: 2016/10/04 15:08 by john1117
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