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

XU4

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

C2

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

C1

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
qmake
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

ATXMEGA32A4U 36KB Flash, 4KB SRAM, 1KB EEPROM
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

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