• USB Tester Backpack 2.0

Warning: If you use this with a quickcharge charger that most cell phones are using these days, please cut the solder jumper located on the bottom side of the OLED Backpack. Failure to do so will risk damaging the backpack due to an over-voltage condition. These quick chargers are able to go over 5V. There is no protection on the USB Tester OLED Backpack.


The USB Tester Backpack is an add-on for the USB Tester that makes it easy to monitor the current and voltage of any USB device. It attaches to the USB Tester and displays the readings directly on the device. The default mode shows a graph of current usage, with the button cycling through the different modes.


The OLED Backpack can also connect to a computer and using the Java app you can data log the resulting data. Which can be imported into Excel as a CSV.



Note: This is only for the backpack! Bundle available here: https://friedcircuits.us/46


New on Backpack

  • Micro USB

  • Button Location on the front left

  • 128x64 OLED Display (Double height of the 1.x version, easier to source)

  • Voltage monitoring of the USB Data lines

  • Easier access to almost all the extra GPIO’s


New Firmware Features (Will be available for 1.x version)

  • Peaks

  • mWh and mAh tracking

  • Big Readout Display

  • JSON for serial communications


Updated Java App (Beta)

  • Implemented JSON over serial

  • Will save as CSV

  • Add display of new data values

  • Working on graphing some of the new data


We’d like to thank Ed for all of his help and contributions.



Write a review

Please login or register to review

USB Tester Backpack 2.0

  • $49.00

Available Options

Related Products

USB Tester 2.0 Bundle

USB Tester 2.0 Bundle

Warning: If you use this with a quickcharge charger that most cell phones are using these days, plea..


USB Tester 2.0

USB Tester 2.0

 Now headers come pre-soldered! USB has become the core of many projects. In my experience I..


1.5ft Micro USB Cable

1.5ft Micro USB Cable

This is a basic 1.5 foot Micro USB cable. A great addition to your USB Tester and/or OLED Backpack o..


DC Tester

DC Tester

The DC Tester is a Voltage and Ampere breakout for measuring DC current. Overview The DC Teste..


USB Tester 3.0

USB Tester 3.0

USB has become one of the most ubiquitous connectors in today’s technology. As it evolves it beco..