craigmadbricky

craigmadbricky t1_its5fr3 wrote

Just repurpose a rolling tape measure. Its got a rubber wheel and you just tape the wholr contraption to some cardboard or ironing table and pull it across the wheel. Trial and error or you can buy a LIDAR hat and SBC computer and program it to measure moving string... 20 bucks my way or $500 and a BS in engineering the other way.

1