This USB In-Line Voltage and Current Meter with OLED Display measures USB voltage, current, power and capacity up to 13V and 3A, with a clear OLED display that can be flipped 180° for easier reading.
This USB In-Line Voltage and Current Meter with OLED Display is a lot like the Charger Doctor Adafruit sell - if the doctor was a talented surgeon who just lost her medical license and has nothing to lose. Just like the charger doctor, you can use this meter to find out if your voltage is too low or your current draw is too high.
Use the USB In-Line Voltage and Current Meter to measure the working voltage and current output for any USB port and project. This blue plastic dongle plugs between a USB device, and passes the data lines through. There's a 0.025 ohm resistor in line with the power pin that is used to measure current draw. This voltage meter has an OLED display that shows off voltage, watts, amps, and mAH and instantly reads the numbers out for testing devices such as chargers, cables, and cell phones. There's a button on the back that allows you to flip the display 180° for easier reading.
You can use this device from 3.7-13VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current.
It's a very handy tool for testing USB devices above 7VDC, checking load levels and debugging battery chargers and boost converters.
Please note: This is not open source.
Features
Measures voltage, current, watts, amps and mAH in real time
OLED display shows readings instantly
USB in-line design passes data lines through to connected devices
0.025 ohm resistor measures current draw accurately
Supports 3.7-13VDC input voltage
Handles up to 3A of current
Rotatable display with 180° flip function for convenient viewing
Test chargers, cables and mobile phones
Debug battery chargers and boost converters
Ideal for testing USB devices above 7VDC
Monitor load levels and power consumption
Blue plastic housing
Specifications
w/o USB Plug: 47mm x 22mm x 11mm
USB Plug: 14mm
Weight: 11.7g
USB 1.x and 2.x - all data speeds. Does not have USB v3 pins so USB v3 connections will automatically downgrade to v2
Working Range: 0~3A, 3.7~13VDC
Resolution: 10mV / 10mA
Package Contents
1x USB Voltage Meter with OLED Display
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