Calibration-Rig

Test rig I used to calibrate the BLDC rpm sensors for my Cobra 2208 motors (https://hobbyking.com/en_us/orange-rpm-sensor.html?___store=en_us) The TCRT optical sensor measured physical rotations whilst the BLDC rpm sensor measured switching frequency of the speed controllers. Note the TCRT model IS NOT MINE but I can't remember where I got the assembly from. I am also aware I misspelt calibration in the folder; I'm good at maths, not spelling.