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We want to use a RC522 RFID chip to provide an access control solution.
ATMEGA168 or ATTINYx depending on whats decided
RGB LED showing status of lock
High current drive of up to 8 1A+ solenoid valves
Will be able to have one RFID card that will be the master that will allow other cards to be added or removed.
Determine best chips for job
Lay out PCB to fit case, including the RFID antenna.
Write C code