USB Voltage Meter with OLED Display SD Card Digital 20 and 21 on

Digital 20 and 21 on Arduino Mega R3

Pin #2 blue LED for bootloading debug & general purpose blinking

check out our stacking headers that allow pass-through stacking

This kit is your friend whenever you need to build up a project

one half is the RGB you know and love

USB Voltage Meter with OLED Display SD Card Digital 20 and 21 onThis USB In Line Voltage and Current Meter with OLED Display is a lot like the Charger Doctor we carry 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