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What waves are used in remote controls?
Remote controls use both infrared and radio frequency technologies. Your typical TV remote uses infrared and your typical car remote uses RF.
What is a frequency?
Frequency really means how often a wavelengths repeats itself and is actually related to time. Different wavelengths can be of a single frequency or they can contain multiple, yet separate frequencies at the same time. One of the ways that wavelengths can be identified, is simply by the frequency. By and large, the frequency used will also tell you a bit about the application in which it's used, as well as the type of frequency you can expect it to be, such as AM, FM, TV, Satellite, or some other type of communications. This is largely in part because there is a published frequency spectrum chart that's available in print and online that identifies most uses for a specific frequency range.
What equipment uses a crystal oscillator in its operation?
Your quartz watch, your cell phone, all electronics that uses a computer inside. The quartz crystal forms the time base for the digital pulses. Crystal oscillators are also used in radio receivers and transmitters to provide accuracy in frequency selection. In a transmitter it provides the exitation frequency. In the receiver it provides the local oscillator in a superhetrodyne setup. Multifrequency devices (tunable and channelised radio) take the local oscillator and multiply and divide it, to provide a comparison frequency for a voltage controlled oscillator (VCO). The VCO is then controlled by a Phase Locked Loop (PLL) which holds the required frequency very accurately.
Is 220V US the same as in France Europe?
Europe uses 230V used to be 240 but was changed a few years back. In France, voltage is 220V and frequency is 50 hertz
What is an RC oscillator?
AnswerOscillator that uses two passive elements for the timing. Namely resistor and capacitor.AnswerIt's an oscillator whose frequency-determining "tank" does not contain an inductive element, like a coil. These are good for extremely low frequencies--down to a few Hertz--but LC oscillators are better at radio frequencies.AnswerAn Rc oscillator is an oscillator that uses 3 or more phase shift networks, ( a network of a capacitor and resistor) as a frequency determining network (tank circuit) and a transistor to amplify that output, that only allows a certain frequency through by only letting the frequency that is able to shift 180 degrees out of phase through. And also has a feedback network from the collector (of the transistor) circuit, to compensate for circuit loss to oscillation.
