1. With a cable in the wall --- 2. Send signals through the mains --- 3. Using Radio Signals
CABLE BASED
The best results can be achieved with dedicated wires, however, this takes time to install and may need an electrician. Thus there are not many devices on the market. If you have time and like a challenge then try it yourself and build your own DIY remote control extender.
It is not as complicated as you think if you use existing modules available in electronics shops. It will take longer and most likely cost more but it will be more fun than just buying it.
Click here to find out how it works.
MAINS BASED
The mains wiring is similar to a dedicated wire as it allows high frequency transmissions and reliability. You are also not inconveniencing your neighbors as signals stop at the electricity meter. This means that you can never accidentally operate the units in an adjoining household, something which is possible with radio based remote control extenders. Signals travel wherever you have a power point, no matter how far.
If you have separate supplies (separate meters) on two levels of the house, the signals will not travel to the other floor. The good news is that the radio transmission restrictions do not apply although certain countries restrict the bandwidth over power lines.
However, if a product is in on sale in your country you are fine. Importing it may possibly make you break the law. Look up the manufacturer's web sites (see below) to find out.
Click here to find out how it works.
RADIO FREQUENCY (RF) BASED
Radio based devices are easily identified as they have an aerial on top. Radio signal devices are easy to build but often suffer from a lack of power and reach. If the transmitter is good enough for reliable work over long distances or through walls it needs high class electronics. Using very expensive components would solve the problem but would you buy it then?
Signals usually travel up to 300 feet (100m) if uninterrupted. A wall or ceiling can reduce this range by up to 100 feet (30m) each. You need to try them out in your own home. More power in the transmission would solve the problem but you would inconvenience your neighbors - and it is (therefore) not allowed by radio standards. Some countries considerably restrict the bandwidth, frequency and power of household appliances.
Like above, you are fine if you bought the device in your country but be careful when importing it; you may be breaking the law. Look up the manufacturer's web sites (see below) to find out.
Click here to find out how it works.