How to use motor shield L293D with RFID reader RC522 on Arduino Mega

Other Hardware Sensors
1

Hello,

I am using the Arduino Mega with a motor shield. I need to add the RC522. However, pins D9 and D8 are already taken by the motor shield thus I cannot connect the RFID reader.

Is there any solution where I can use both the motor shield and RFID reader?

2

One solution is to change the headers. The L293 motor shield has male headers only. You can remove the male headers. Then you have to replace them with two- way headers like these: Amazon.com
These are called shield stacking headers. These will let you connect your sensors to the Arduino.

3

Why do you need to use pins 9 and 10 for the RFID reader ?

4

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.