Measure speed options

[DaveX]

Hysteresis of Arduino digital inputs, measurement of

Here's a pic of a set of LEDs/photodetectors in a bracket aiming at a stick-built DIY dual photo-interrupter/quadrature encoder. [image] I cranked the pot up to 250K, and am getting >0.6*VCC signals out of this configuration, but it still toggles cleanly around VCC/2 due to the Schmitt trigger. The 3d parts are from: