Hello,
for my project i am making use of 4 TCRT5000 IR-reflective sensors.
i worked with these at school and that is where i got the resistor values from. but that was hooked up to an arduino that has an operating voltage of 5V.
but now i have an ESP32 S3 which works on 3.3V. so i think if i will read the values from the analog pin i will kill my ESP because if it absorbs all the light more than 3.3V will come through.
it is power from external 5V
i know i need to connect the ground to my ESP for correct measuring. but i haven't done that yet.
how do i make sure that i don't kill my ESP? I was thinking about a resistor on the Analog input, but not sure what value.
note: changing the current resistors will be a pain in the ass. So i hope that the analog input will also work.