Currently using an IR reflectance sensor and a hole on the spool gear - you can kind of see it here: https://github.com/scottbez1/splitflap/wiki/Electronics htt

Currently using an IR reflectance sensor and a hole on the spool gear - you can kind of see it here: https://github.com/scottbez1/splitflap/wiki/Electronics https://github.com/scottbez1/splitflap/wiki/Electronics The sensor is mounted on a PCB that can be physically shifted to apply minor adjustments to the home position. The adjustments could easily be done in software, but doing it physically "stores" the adjustment parameter for each module without having to reprogram the controller.