[DegrawSt] uses four 50 kg load cells to create a bathroom scale using an Arduino. Load cells typically contain strain gauges that change resistance when deformed.

DO NOT connect in any ways the main power supply that drive the LOAD to the arduino and transistor circuitry! Turn OFF the relay with delay You can use this code example to introduce a delay in your ...

Either way you choose, he shows us how a $6 load cell and a $10 amplifier can be used to accurately measure the torque of your favorite power driver with an Arduino.