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The first radio receivers used a coherer and sounding board, and were only able to receive continuous wave (CW) transmissions, encoded with Morse code (wireless telegraphy). Later transmission and reception of speech became possible, although Morse code transmission continued in use until the 1990s.
Radio control. Radio control (often abbreviated to RC) is the use of control signals transmitted by radio to remotely operate a device. Examples of simple radio control systems are garage door openers and keyless entry systems for vehicles, in which a small handheld radio transmitter unlocks or opens doors.
Part 7—Construction details for an interface board that will permit motor control via remote control or an on-board computer. James A. Gupton, Jr. 52/2: February 1981 DMM accessory for ultra-low ohms: Add-on accessory for your DMM extends resistance measurements down to .0001 ohms. J. T. Cataldo: 52/2: February 1981 PROM programmer
Kraft Systems, Inc., was an American electronics company based in San Diego County, California, and active from 1962 to 1994. The company was founded by Philip O. Kraft and began as a manufacturer of transmitters for radio-controlled models, namely RC aircraft. In 1972, the company was acquired by the Carlisle Corporation of Cincinnati, Ohio ...
A French ship-to-shore radio station in 1904. The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection. These developments allowed Guglielmo Marconi ...
Tuner (radio) A tuner is a subsystem that receives radio frequency (RF) transmissions, such as FM broadcasting, and converts the selected carrier frequency and its associated bandwidth into a fixed frequency that is suitable for further processing, usually because a lower frequency is used on the output. Broadcast FM / AM transmissions usually ...
Model 4. Tandy Corporation introduced the TRS-80 Model 4 on April 26, 1983 as the successor to the TRS-80 Model III. The Model 4 has a faster Z80A 4 MHz CPU, [5] larger video display of 80 columns by 24 rows, bigger keyboard, and can be upgraded to 128KB of RAM. It is compatible with Model III software and CP/M application software.
John Hays Hammond Jr. and Sr., 1922. John Hays Hammond Jr. (April 13, 1888 – February 12, 1965) was an American inventor known as "The Father of Radio Control".Hammond's pioneering developments in electronic remote control are the foundation for all modern radio remote control devices, including modern missile guidance systems, unmanned aerial vehicles (UAVs), and the unmanned combat aerial ...
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