Drawer Laser

G'day All Well here is my entry.. Laser line with a receiver, if the laser line is broken the solenoid activates and the lock is pushed up to the gear, (attached to the top of the drawer) the lock is attached to a spring so the drawer can open but can not close, (like a cable tie) if the laser line is not broken the solenoid retracts and the drawer can mover freely. So: -If a drawer has an over sized object it can not close -If a drawer has an item that grows as it is "stuffed in" the drawer will stop closing and can only open -Method can be added to any existing drawer (module on one side and a mirror strip on the other) Anyway.... that's it :) Update : I have made the lock and the sensors separate (wires connected through holes in the back). Lock can now me moved to the preference of the user (or best fit) Additionally the Laser is now positioned in one corner an receiver in other so beam can bounce multiple times Update : All Items are now independent and can be placed on the inside or outside of any drawer (as per suggestions)