How to connect CNY70
Marked area is the surface where you can find CNY70 label


I connected the resistors on the CNY70 and put silicone on the connections



How to use 74CH14 – Hex inverting Schmitt trigger
CNY70 has an analog output and we can not connect this directly to Arduino’s digital input
In order to make this connection, we need to use 74HC14 Hex Inverting Schmitt trigger and get digital output.
Below you can find the details in the pictures.


74HC14 on the ARDUINOIMG_1285