I want to connect a Nano 33 IoT (Slave) and an Uno (Master) via SPI. I wrote the code for the interface and now I want to try it out. But there is a point Im not sure about:
The Nano is based on 3,3 V and in my case i operate the Uno in 5V.
Can I simply connect both boards without damaging the Nano with the Uno voltage?
Are there mid/long term consequences? (lower lifetime, higher temperature)