Adafruit Mini 3-wire Volt Meter (0 - 99.9VDC)

Put a voltage meter anywhere with this very handy display. These are often used for keeping track of batteries but work great on a breadboard or enclosure. This is the 3-wire version of the volt meter; two wires power it and the third measures voltage.

Easily connect the red wire to a positive power supply ranging from 4.5 to 28VDC, and the brown or black wire to the ground to power the display. The orange or white wire measures voltage. The display includes a microcontroller that reads the voltage, compares it to a stable reference, and shows the voltage with 0.1V precision on a 3-digit 7-segment display.

It can read from 0V to 99.9VDC, ideal for any electronic project. The meter draws just 3-4mA to power the microcontroller and display. This LED display features a vivid green color, offering excellent readability. Mounting tabs provide easy attachment to any box or plate.