Before the TV remote control was invented, we got much more exercise than we do now. Of course, we had fewer channels then. Mechanical TV tuners wouldn't be practical today in the world of 500+ channels. And remote controls also come with room air conditioners, heating systems, and even gas fireplaces. So let's get at least a little exercise by trying to understand and fix remote controls.

How Does It Work?

A remote control is a hand-held device for turning on or off, selecting features, and adjusting electronic equipment such as televisions, VCRs, DVDs, stereo equipment, and many other household devices including your garage door opener. When a button is pressed, the remote control unit sends out an infrared (invisible) signal that's read and interpreted by the device. A remote control is a battery-powered transmitter.

What Can Go Wrong?

Remote controls typically consist of circuit boards, batteries, a touch pad, and case. Usually the problem is caused either by low batteries or damage from dropping or immersing the remote.

The very thing that makes remote controls so useful--their portability--makes them vulnerable to damage. Circuit boards can be cracked and soldered connections can fail. Water or other liquids can be spilled and leak into the case. Damage can sometimes be repaired, but a new remote is not that expensive so many people opt to replace rather than fix. Think of all the adventure they're missing!