Hi,
I want to connect my arduino nano BLE 33 to my arduino nano v3. I know it's possible to connect two different arduino's and I have looked up how to do it. But I was wondering if it is possible for my two nano's since de nano BLE 33 opperates on 3.3V and the nano v3 on 5V. So if anyone knows if this is possible and how i should handle it, please leave a comment.
Thanks,
Leander
You need a logic level converter of some sort to connect 3.3V and 5V devices. Example.
A voltage divider works too, but only in one direction (5V output to 3.3V input).
If the 3.3 v device is only receiving input from the 5 v. device, just use 10K resistors in each signal line. If you need the 3.3 v device to signal the 5 v. device, use the shifter shown at
[SOLVED] Logic Level Shifter with 2N7000 not working - General Electronics - Arduino Forum.
The OP there seemd to think it was not working for him. But is has always worked for me. Overall, the price of the components needed is much lower than buying the level shifter boards, if you buy, say, 50 transistors at once. As we have more and more marriages of the two voltage levels, these will prove to be a good investment.
jrdoner