This DIY current sensor measures up to 15A and displays it on an OLED screen

When working with electronics, voltage is fairly easy to measure, but current often takes a bit more finesse. For this purpose, Utsav Shah decided to create his own current sensor capable of handling up to 15A.

The DIY device uses a shunt resistor, a voltage divider, and an LM358 op-amp to produce a voltage that corresponds to the current value. An Arduino Nano reads this voltage, calculates the current via a calibration factor, and shows it on an OLED screen for feedback.

– Werbung –

The video below goes over the board’s design, and how it was constructed using an etched PCB method. It’s evaluated at the end of the clip with a multimeter, which corresponds nicely to what’s on display with the Nano/op-amp setup.