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A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix.
Luna Innovations was founded by Kent Murphy, [1] an electrical engineering professor at Virginia Tech and was originally headquartered in Blacksburg, Virginia, and still has a manufacturing facility there. It moved its headquarters to Roanoke in September 2006.
Scancodes on IBM PC compatible computer keyboards are sets of 1 to 3 bytes which are sent by the keyboard. Most character keys have a single byte scancode; keys that perform special functions have 2-byte or 3-byte scancodes, usually beginning with the byte (in hexadecimal) E0, E1, or E2.
SSTV was used to transmit images of the far side of the Moon from Luna 3. [3] The first space television system was called Seliger-Tral-D and was used aboard Vostok. Vostok was based on an earlier videophone project which used two cameras, with persistent LI-23 iconoscope tubes. Its output was 10 frames per second at 100 lines per frame video ...