Using MiFARE RFID NFC Cards to store prepaid credit information.

This is a device to write, add and substract credit information on a MiFARE card to use for prepaid systems. You may change access keys of MiFARE card to add security.

I have used a YwRobot breadboard power supply to power 5V and 3.3V Inputs.
Connect ribbon jumper cables straigt between devices and male headers. Headers on board are arranged in same order of corresponding device's pins.

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compagni1451 3 years, 5 months ago

thanks

kellad 3 years, 5 months ago

Actually, I suggest using an io expander for keyboard. Because resistors are not always accurate enough. I have updated the project using an io expander.

kellad 3 years, 5 months ago

Hi, You can find AnalogMatrixKeypad library here: http://experimentaltechnik.com/wp-content/uploads/2014/09/AnalogMatrixKeypad.rar

compagni1451 3 years, 5 months ago

I come from Belgium and i speak English but not very well. I don't find the AnalogMatrixKeypad.h library anywhere. Could you tell me where to find it please ?