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Reverse side of the same 402 plugboard, showing the pins that make contact with the machine's internal wiring. The holes were called hubs. A plugboard or control panel (the term used depends on the application area) is an array of jacks or sockets (often called hubs) into which patch cords can be inserted to complete an electrical circuit.
Plug board may refer to: . Plugboard, a component of certain encryption machines, unit record equipment and some early computers; Telephone switchboard, another name for a manual exchange
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.
Any Enigma - fully configurable Rotors, Plugboard and Reflector. Sample models: German Railway (Rocket), Swiss K: No: Yes Web Encryptor - The Online Encrypter [6] React App: Enigma I, M3 (Army/Navy), M4 (Army/Navy), Railway, Tirpitz, Zahlwerk (Default/G-260/G-312), Swiss-K (Air Force/Commercial) No: Yes Franklin Heath Enigma Simulator [7] Android
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The plugboard allows rewiring the connections between keyboard (2) and fixed entry wheel (4). Next, the current proceeds through the—unused, so closed—plug (3) via the entry wheel (4) through the wirings of the three (Wehrmacht Enigma) or four (Kriegsmarine M4 or Abwehr variant) rotors (5) and enters the reflector (6).
The IBM 513, 514 and 519 all operated at 100 cards per minute, [8] and their operations were directed by a removable control panel that was known as a plugboard. [9] As with other IBM punched card devices that operated as automatic punches, cards are fed "face down, 12-edge first.".
The IBM 608 Transistor Calculator, a plugboard-programmable unit, was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the world's first all-transistorized calculator to be manufactured for the commercial market. [1] [2]: 34 Announced in April 1955, [3] [4] it was released in December 1957. The 608 ...