GREGORY MACNICOL / SCIENCE PHOTO LIBRARY GREGORY MACNICOL / SCIENCE PHOTO LIBRARY
Circuit board. Conceptual computer artwork of the symbols for electrical components joined together to form an electronic circuit. The square objects are integrated circuits, such as microchips, that are themselves microscopic circuits that perform the processing of instructions in computers and other electronic devices. The symbols represent logic gates that process signals. The output will depend on the input and the logic gate. The ones seen here are: NAND (blue), NOR (yellow), AND (grey), EX-NOR (gold), EX-OR (pink) and OR (light blue, triangles). The circuit contacts, where the input signals arrive and output signal leave, are red.
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