Learn how to create a simple heart rate monitor using an Arduino Pro Mini, PulseSensor, and OLED display. This beginner-friendly project is perfect for learning basic electronics, sensors, and ...

Whereas a typical scale would then simply show the resulting number on an LCD display, [Mirko] decided to use a moving coil meter driven by the Arduino’s analog output.

It can run on the Uno, Nano, Pro Micro, or even home-brew Arduino boards. He’s demonstrating the program with a Nokia 5110 LCD, but has also included code for the typical 2×16 LCD displays.