How do remote controls work?
Generally there are two types of remote controls: infrared (IR) and radio frequency (RF). Infrared remote controls work by sending infrared light pulses to the device, while RF remote control uses radio waves in almost the same way. Pragmatically is the biggest difference between the two ranges. The IR remote controls require a clear line of sight to the receiving device and their range occurs as much as possible about 30 feet (9.14 meters). RF remote controls can pass through the walls and around the corners, with a series of about 100 feet (30.48 meters).
Most home entertainment components such as stereos, TVs and home entertainment centers use IR remote control. The remote control contains the inner circuit plate, processor and one or two light emitting diodes (LED).
When you press the remote control button, it transmits the corresponding code to the receiving device using LED infrared pulses. The thought is somewhat similar to the flashes of the signalSOS, but instead of letters flashed light transmits the 1S and 0s series. "1" can be represented by a long flash while "0", a short flash. The receiver, built into the component, receives light impulses and the processor decodes flashes into the digital bits needed to activate the function.
Along with the required function, the remote controls must also plant other data. They first transmit the code for the device they control. This allows IR receivers to know that IR signals it picks up is designed for it. He basically says to the component to start listening. Follow -up data, limited by stop command to communicate the IR device, return to passive mode.
Some remote controls can be very fine, which requires users to point remotely directly to the component. It's because of a weak transmitter. Changing batteries can help but if it translates bad, impulses are transmitted in the oustKém beam. More robust IR transmitters and remote controls with double LED transmit wider rays that allow the user to direct the long -distance direction of the transmitter.
Sometimes it happens that a chair or a favorite place on the couch does not have a clear line for an entertainment center or television. There is often a coffee table or some other object. When this happens, we find that we lift the arm and try to control the object "around" the device. It can be quite unpleasant, but there is an easy alternative.
Since the light reflects objects, it is sometimes more convenient to show the remote control towards the lining wall or even to the ceiling to change the channel or send the function command. The light is reflected from the surface of the wall or ceiling and scattering. If you reflect it at a convenient angle, the scattered light will reach the components. Often it is the easiest, with the elbow based on Armrest, turn the wrist back and point the remote control on the wall for . It can work quite well even if the remote has oozedDac is directed in the exact opposite direction of the components. Once you find the simplest sweet places around the room from which you can bounce your signal, you can use them instead of trying to bypass your obstacle line of supervision.
Openers of garage doors, alarm systems, key FOBS and radio toys use RF remote control. RF remote control works essentially the same as IR remote control, except that they use radio waves. As mentioned, radio waves can also penetrate the walls and bypass objects and corners, which makes RF more comfortable than IR.
Some top entertainment systems come with RF remote controls for extended distant range. There are also IR-RF remote controls that allow IR to expand their range using the RF translator, which basically acts as an intermediary. RF converters the IR signal in the RF waves to get it further. Converter on the component side returns the RF signal backIrish to understand the component.
If you have been overcome by remote controls, you can consider the main universal driver. Low-end Universal Relepes, available for about $ 10 (USD), allows you to control several devices. However, the original remote controls may still be required to access and control the advanced components. Some top universal remote controls have LCD screens and are more like electronic pillows than conventional remote controls. These universal main drivers remove the need to use the original remote controls, but may require a ramp to learn.