Search results
Results from the WOW.Com Content Network
A Wordlock letter combination lock.. A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an ...
An adder, or summer, [1] is a digital circuit that performs addition of numbers. In many computers and other kinds of processors , adders are used in the arithmetic logic units (ALUs). They are also used in other parts of the processor, where they are used to calculate addresses , table indices , increment and decrement operators and similar ...
In automata theory, combinational logic (also referred to as time-independent logic[1]) is a type of digital logic that is implemented by Boolean circuits, where the output is a pure function of the present input only. This is in contrast to sequential logic, in which the output depends not only on the present input but also on the history of ...
Rotary combination lock. A rotary dial combination padlock. A rotary combination lock is a lock commonly used to secure safes and as an unkeyed padlock mechanism. This type of locking mechanism consists of a single dial which must be rotated left and right in a certain combination in order to open the lock.
A time-delay combination lock is most commonly a digital, electronic combination lock equipped with a delay timer that delays the unlocking of the lock by a user-definable delay period, usually less than one hour. Unlike the time lock, which unlocks at a preset time (as in the case of a bank vault), time-delay locks operate each time the safe ...
Keypad. A telephone keypad using the ITU E.161 standard. Numeric keypad, integrated with a computer keyboard. A calculator. 1984 flier for projected capacitance keypad. A keypad is a block or pad of buttons set with an arrangement of digits, symbols, or alphabetical letters. Pads mostly containing numbers and used with computers are numeric ...
Smart lock. A smart lock is an electromechanical lock that is designed to perform locking and unlocking operations on a door when it receives a prompt via an electronic keypad, biometric sensor, access card, Bluetooth, or Wi-FI from a registered mobile device. These locks are called smart locks because they use advanced technology and Internet ...
It is the basic storage element in sequential logic. Flip-flops and latches are fundamental building blocks of digital electronics systems used in computers, communications, and many other types of systems. Flip-flops and latches are used as data storage elements to store a single bit (binary digit) of data; one of its two states represents a ...