My Ant Compact PCB Maker Tachometer

Tachometer customized for Ant Compact PCB Maker. using ardunio mini pro and sensor TCRT5000

https://www.youtube.com/watch?v=80f1Lpiizgk&feature=youtu.be

Here's the Instructable of the original tachometer (need to read)
https://www.instructables.com/id/Add-an-Arduino-based-Optical-Tachometer-to-a-CNC-R

printed all stl files 100% and with support.

to program the ardunio mini pro

https://learn.sparkfun.com/tutorials/using-the-arduino-pro-mini-33v/all