The sensor produces hundreds of data points during the short duration of the burn, which is perfect for graphing the motor’s thrust ... using with a simple 9V battery solved the problem, and ...

Unfortunately, the mechanical bits inside the switch were broken, and the motor couldn’t be turned on. To solve the problem without sourcing a new switch, [Jean-Noel] built his own Arduino ...

This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer. In my example the whole ...