i m from indonesia, and i like to design an application using a smart card.

this is my project.

i want to control one device using a smart card. the smart card reader can give a control signal to make another device ON (example: coil) only if the code in the card is the same.

if i m put a code in card is "QQQ" then the card reader should can read that code and make another device ON. but if the card reader read a different code, the reader should not make another devise ON.

what kind of smartcard and reader that i must have, its so many type isnt? can i buy it? where?
can you give me more information about my topic and send it to my email?
can you help me, please? i need it so much.