I'm reading a proximity sensor on a Teensy 3.2 and having that Teensy 3.2 output a scaled value through its analog output to an analog input on a Teensy 4.1. I have both teensies plugged into the same laptop, and I have connected GND on T3.2 to GND on T4.1.
1) Do I need to put some sort of resistor between the analog output pin of T32 and the analog input pin of T41? I guess I'm just wondering if what I'm basically doing is shorting the pins if analogWrite goes to a max value and going to end up with fried pins on both boards if I don't have some sort of resistor between them. If so, what resistor should I use?
2) would it be better to connect AGND (instead of GND) on Teensy 3.2 to GND on Teensy 4.1?
Thanks
1) Do I need to put some sort of resistor between the analog output pin of T32 and the analog input pin of T41? I guess I'm just wondering if what I'm basically doing is shorting the pins if analogWrite goes to a max value and going to end up with fried pins on both boards if I don't have some sort of resistor between them. If so, what resistor should I use?
2) would it be better to connect AGND (instead of GND) on Teensy 3.2 to GND on Teensy 4.1?
Thanks