Tap / Swipe Credit card to pay. The machine recognizes certain credit cards which can be tappedinstead of swiped to make payments.
Automatic-Doors (Motion sensors):
Card-Reader with a timed-unlock mechanism, and a button to automatically open the door (also timed):
Bill-reader, starts pulling a bill inside if it senses the right amount of a dollar bill being slipped into the reader.
Motion-sensor Automatic Dispensers: