Last update on the science fair project. Here is his setup, doing the measurements on the conventional propeller.

We then went over how to analyze the data and create a chart with error bars.

#electronics #robotics #sciencefair #stem

The original rails system had too much friction. This is the new plan. Alt text for details

#robotics #sciencefair

Everything in its right place.

#electronics #robotics #sciencefair

All the parts work now!
Switched to a BTS7960 driver because the L298N just couldn’t drive the motor past 2500RPM
Added Tare, Speed and Stop buttons
The motor and decoder are in their vessel, which moves on two rails.
The load cell is on the bottom of the photo

#electronics #robotics

This mess is going to be the apparatus for my son’s science fair project. A thing to measure propeller thrust.

If I can get it all working.

#electronics #science #diy