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Japan Remote Control Co., Ltd. (日本遠隔制御株式会社; Nippon Enkaku Seigyo Kabushiki Gaisha) (commonly called source Propo, source Racing, or hum) [citation needed] was a Japanese manufacturer of popular radio control devices including transmitters, receivers, servos, electronics, programmable robots and model aircraft.
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.
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It has since become one of the leading sources of user-generated reviews and ratings for businesses. Yelp grew in usage and raised several rounds of funding in the following years. By 2010, it had $30 million in revenue, and the website had published about 4.5 million crowd-sourced reviews. From 2009 to 2012, Yelp expanded throughout Europe and ...
Horizon Hobby, LLC is an American multinational hobby-grade RC radio control (RC) model, model train manufacturer, and distributor. It was founded by Rick Stephens, Janet Ottmers, Debra Love, and Eric Meyers, [1] in July 1985, [2] and headquartered in Champaign, Illinois. [3] Horizon Hobby products are sold in more than 50 countries. [4]
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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 ...
The earliest form of sequential (although not proportional) actuator for radio control was the escapement. [3] Like the device used in clocks, this escapement controls the release of stored energy from a spring or rubber band. Each signal from the transmitter operates a small solenoid that then allows a two- or four-lobed pawl to rotate.