Portable Voltmeter

• Housing Structure features a modular 3D-printed enclosure, divided into a base and a rear cover. The rear cover bears the “MoNing” logo, with screw holes at all four corners for secure fastening. The housing includes openings for the display screen and cable routing, while its internal space is neatly organized to perfectly accommodate the digital voltmeter module. It’s easy to disassemble and reassemble, showcasing a refined printed surface texture.

  

  

   

• Operating Principle incorporates a 0.36-inch two-wire DC digital voltmeter module, capable of displaying real-time voltage readings from lithium batteries and other DC power sources. The screen offers crisp, bright digits and includes reverse-polarity protection. Wiring is straightforward, and it can be powered by an 18650 battery to perform voltage measurements, providing an intuitive view of remaining charge levels.

   

• Application Scenarios With its compact, portable design, this device is ideal for maker DIY projects, electronics training labs, battery maintenance, and small circuit debugging. It serves as a convenient handheld voltage tester and can also double as a decorative desktop display piece for science and technology exhibits.