IO Expansion Shield for Arduino V7
Hans 2014-02-22 08:21:59 2587 Views1 Replies I want to use this shield for Arduino Due. You can select 3.3v, however, the confusing thing is that some VCCs are labeled with 5v, for instance the I2C ones. Does that mean that for those pins the 3.3v selection is not valid?
A related question. Are there any plans to build a Due expansion shield?
A related question. Are there any plans to build a Due expansion shield?
2014-02-24 23:23:53 Hello Hans,
That is right, the VCC for I2C is 5V, the switch does not affect its voltage.
I suggest you to set the 3.3V jumper cap, and wire the 3.3V from the pins instead of the I2C port.
However a lot of sensors require 5V, in which case, you can use internal resistors. I know UNO has them, but I am not sure if DUE has also the internal resistors and if that would be enough to use 5V I2C.
As far as I know there is nothing brewing for Due expansion shields.
Cheers^^ Jose
That is right, the VCC for I2C is 5V, the switch does not affect its voltage.
I suggest you to set the 3.3V jumper cap, and wire the 3.3V from the pins instead of the I2C port.
However a lot of sensors require 5V, in which case, you can use internal resistors. I know UNO has them, but I am not sure if DUE has also the internal resistors and if that would be enough to use 5V I2C.
As far as I know there is nothing brewing for Due expansion shields.
Cheers^^
Jose 