This is a mini DC voltmeter with LED display. Thanks to the small dimension it can be easily integrated into your project. It has three wires (yellow, red and black) and can measure up to 100V.
Simply connect the red wire to a positive power supply from 3 to 32VDC, and black to the common ground to power the display. Finally, connect the white SENSE wire to whatever you want to measure the voltage of. The display has a microcontroller that will read the voltage, compare it to a stable reference and display the voltage with 0.1V precision on a 3-digit 0.36” 7-segment display. It can read from 0V to 99.9VDC so it will be good for any electronic project! The meter draws approximately 20mA to power the microcontroller and display.