Mini 2-wire Volt Meter (3.2 - 30 VDC)

This super handy 2-wire volt meter can be placed anywhere. It's a favorite among RC hobbyists for monitoring batteries, and it's also perfect for breadboards or enclosures. Unlike the 3-wire version that measures a wider voltage range, this 2-wire one uses just two wires for both power and measurement. Simply connect the red wire to the positive supply and the black wire to the negative ground. Its microcontroller reads the voltage, compares it to a stable reference, and shows the voltage with 0.1V precision on a 3 - digit 7 - segment vivid green display. It works from 3.2V to 30V, fitting nearly any electronic project. It only draws 3 - 4mA to power the microcontroller and display. With mounting tabs, it's easy to attach to any box or plate.

Using this volt meter is a breeze. First, find a suitable spot for it, whether it's on a breadboard or inside an enclosure. Then, connect the red wire to the positive power supply and the black wire to the negative ground. Once connected, the meter will start showing the voltage with 0.1V precision on its vivid green display. As it only draws 3 - 4mA, it won't drain your power source. When it comes to maintenance, keep it away from extreme temperatures and moisture. If you need to move it, use the mounting tabs to secure it properly. And remember, this meter works well with voltages from 3.2V to 30V, so make sure your project's voltage is within this range.