You can get an idea for how a radio transmitter works by starting with a battery and a piece of wire. A battery sends electricity (a stream of electrons) through a wire if you connect the wire between the two terminals of the battery. The moving electrons create a magnetic field surroundi...
Traditional radio station broadcasts are limited by two factors: the power of the station's transmitter (typically 100 miles) the available broadcast spectrum (you might get a couple of dozen radio stations locally) Internet radio has no geographic limitations, so a broadcaster in Kuala Lumpur can...
Megahertz means "millions of cycles per second," so "91.5 megahertz" means that the transmitter at the radio station is oscillating at a frequency of 91,500,000 cycles per second. Your FM radio can tune in to that specific frequency and give you clear reception of that station. All FM ...
This arrangement could be used close to a transmitter, and when a coil and capacitor were added, it became possible to tune to more than one transmitter signal. The solution to the problems of medium-wave radio was supersonic heterodyne ("superhet") receiver. The principle is to eliminate ...
No, FM Transmitter Apps Don't Work Unfortunately, you need hardware to transmit any kind of FM signal, which almost all phones don't have. While you might remember that some old feature phones and even modern smartphones have a built-in FM radio, it is not the same as FM transmission....
Radio waves transmitted from the nearby BBC short-wave transmitter are reflected by an RAF Heyford that was used as the first Radar target. And so Brittain embarks on an ambitious air defense program, today known as radar. A research and development team is quickly recruited amongst the most...
Inside a Rumble Robot controller Most remote control toys are operated by a radio transmitter. When you move the controls, the transmitter sends a radio signal, at a particular frequency, to a radio receiver inside the toy. The radio signal includes a distinctive set of electromagnetic pulses,...
The transmitter sends a control signal to the receiver using radio waves (see How Radio Works for details), which then drives a motor, causing a specific action to occur. The motor in a car may cause the wheels to turn, while the motor in a plane may adjust the flaps. The power sourc...
Take a look at our article onHow to Build an AM Radio Transmitterif you’re interested in building an AM transmitter. How to Build an FM Transmitter The FM transmitter we are going to build works quite well. In my testing, it has a range of about 50 meters. However, the range is hi...
Unlike QAM systems, receivers equipped with phase or frequency modulation can limitamplifiersand remove any amplitude noise. This approach improves its noise reliance. Furthermore, amplification of the phase or frequency modulated in a radio transmitter eliminates the need for linear amplifiers. ...