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Topic: Using Arduino Uno Stepper Motor Shield with two stepper motors and RFID reader (Read 6992 times) previous topic - next topic

Grumpy_Mike

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If I join the wires so that both RFID readers use the same arduino pins would that work?

No.

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I'm thinking the voltage would half which may prevent it working.

That is not the reason. You can not have two outputs connected together because when one is high and the other low you have in effect a dead short through your two devices. The ways round this are:-
1) Have readers with an open collector output.
2) Use two open collector non inverting buffers
3) Use a different input pin for each reader.

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