Measure voltage and current with the Tiny V/A Meter

Measuring voltage with a multimeter is easy enough, and current is a bit harder, but reading both values simultaneously can be a challenge. If you’re tired of having to replug or find two meters, then look no further than Karl Kristian Torp’s palm-sized Tiny V/A.  His Arduino Nano-based unit takes input from a power supply via a female barrel jack connector. This supplies the load through a male connector output, and also powers the Arduino, an IN219 sensor, and a 0.96” OLED display. Everything is housed inside a 3D-printed case.

A single capacitive touch buttons allows you to easily navigate Tiny V/A’s menu and change settings like sensor range and refresh rate. Additionally, it can even powered over USB as needed for an expanded voltage range. More details on the project are available in Torp’s Instructables post.