I use a Mega 2560. It has a bunch of I/O pins.
Otherwise, if you want to use the SD card with the MUX shield, you should think about modifying the MUX library to use a digital pin other than D4 and do a pin bend and jumper.
I use a Mega 2560. It has a bunch of I/O pins.
Otherwise, if you want to use the SD card with the MUX shield, you should think about modifying the MUX library to use a digital pin other than D4 and do a pin bend and jumper.