It is very simple; measure the dc voltages at A0 of your Arduino setup when bin level is minimum, medium, and full using a DMM, and make analog reading values using the formula “1024/5 x V”. For ...

You'll have a bit of control over what you choose for the motion sensor, motor, and jumper wires. You can pick up a pack of six SG90 motors from Amazon for a little under $12. A 10-pack of the HC ...