These devices include televisions, stereos, DVD players, game consoles, and more.

The IR remote control pulses this “invisible” light in binary code.

Each “command” has a specific code.

Image of a man using an IR remote control

Rob Lewine\Getty Images

These command codes might include:

The electronic devices receiving the signal have sensors to detect the IR light.

These sensors transmit the code to the microprocessor inside the electronic gear.

The microprocessor then interprets the code and translates it into the appropriate instructions to perform.

Since infrared signals are light, the signals are easily blocked.

Any object, like a chair or cabinet door, can easily interrupt the remote control from working.

The overall range of these remotes is about 30 feet.

There are a few ways IR remote control manufacturers have developed to get around this limitation.

More expensive remotes include more than one transmitter, usually between two to four.

This will fill more of the room, but it doesn’t entirely overcome the line-of-site problems.

To replace these, it’s possible for you to purchase aprogrammable universal IR remote control.

Some of these remotes also come with preprogrammed code sets.