yes there is a ground going from the arduino (next to 5v pin) that goes to card reader, at the card reader that ground feeds 2 switched and a chip,
do i need a separate ground to the metal frame of the card reader as well??
yes there is a ground going from the arduino (next to 5v pin) that goes to card reader, at the card reader that ground feeds 2 switched and a chip,
do i need a separate ground to the metal frame of the card reader as well??