Reflective IR bed-leveling sensor

thingiverse

Here is a simple IR sensor designed for Z leveling that detects the glass bed at approximately 15mm from the sensor. It fits perfectly on the Geeetech i3 Pro B carrier screws intended for example use with 3dtouch bed leveling sensors. This clever device utilizes an ATTINY85 microcontroller, paired with a 5mm IR receiver photo diode and a 3mm IR LED to achieve precise Z leveling.