Digital locks
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Digital lock like a keypad with a customisable length digit code.
For example 4-digit numerical lock or a keypad that allows for a password, rather than each little bit on the keyboard or key pad working when clicked it would open a box where the code/password could be inputted.
These could either act like a button if the code or password is correct or they could acts as an input for programmable blocks that would allow a more realistic way of inputing arguments to a programmable block.
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