Ultra high precision low cost digital voltage meter - allows you to put a voltage meter anywhere with this very handy display package. Use to monitor the voltage of RC battery packs, solar panel installation, amateur radio backup power supply, bench power supply output, or put onto a breadboard to watch power into your projects. 3-wire version of the volt meter, two wires are used to power it and the third wire is used for measurement. If you want to monitor the voltage of the circuit powering the display, join the Power and Sense wires together.
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.
PCB: 33mm wide x 16mm
Display: 23mm x 14mm (three 0.36” digital 7-segment LEDs)
Combined Depth: 10mm
Mounting Hold Pitch: 28mm
Mounting Hole Size: 2.8mm (mount with M2.0 x 12 screws)
Operating Temperature: -10c to +65c
Input Impedance: About 100K ohm
Display Refresh Rate: 500mS (2 times per second)
Measurement Accuracy: +/- 0.1%
Available in Red, Green or Blue
Lead Length: 15cm
Red: Power supply + (positive)
Black: Power supply – (negative)
White: Sense (voltage sense wire). Join White & Red to measure supply voltage
3.0V to 32V DC power
0V to 99.9V DC measurement
For use with positive voltages only!