Chamberlain Garage Door Opener

You'd be right to be concerned about security with your wireless garage door opener and remote. An intruder can gain access to your garage contents, or even your home if you don't follow some simple security steps.

Different radio frequencies are used for communication between the remote and the opener. Tiny switches known as dip switches are used to adjust the frequency used between the two. It is a wise idea to reconfigure the dip switch settings to make sure your garage more secure.

A dip switch is a small block of plastic about the size of a dice cut in half. They are usually colored blue or red with 8 to 10 tiny white switch levers positioned up or down. Only when the up / down switch patterns match on both devices will your garage door opener remote control be able to communicate with the opener unit. By adjusting the switch pattern, you are changing the radio frequency used to communicate between the two.

You should be able to easily locate the dip switch on the opener and on the remote control clicker. But to get access to the dip switch on the remote you might need to open it up if the dip switch isn't found in the battery compartment. Remove the screws holding the remote together, or carefully pry it apart if there are no screws. Once you have access to the dip switch on the remote, scramble the switch positions, and then match the positions on the openers dip switch block. It does not matter what the pattern looks like, so long as its a random pattern that would be difficult for someone to guess.

If you have trouble getting the remote to work after doing this, verify that the dip switch patterns are the same on both units. Then check the remote battery is in good condition, and as usual, make sure the opener has power, and operates normally using the control panel inside your garage. You might have to read the manual if all else fails.

If you are thinking of getting a new garage door opener or have already gotten one, then you will want to change settings, just to make sure everyone is honest. Don't forget, your installer or anyone working with him knows your frequency switch settings unless you change them. So go ahead and mix up the switch pattern settings and test that it works.

Even if you are a garage door opener installation do-it-yourself type, you'll want to make the same changes. Don't just stay with the factory default settings. If you did, then anyone could just drive down your street with a compatible remote until he finds a door that opens and gives access to your home. Make sure that's not you.

This advise also applies to anyone buying or renting a new home too. Just like you might change the lock to guarantee there are no spare keys floating around that could compromise your home security. You have no way of knowing how many previous residence there might have been. And you wouldn't want someone to just walk right into your garage or home.

A Doorhandle Can Also Be A Garage Door Opener

As the name suggests a garage door opener is a device that is used to open and close garage doors. Generally the models are remote controlled.

Evolution

The initial garage door openers consisted of an actuator that could open or close the door. This actuator was controlled by a remote. The remote used was very simple and consisted of a transmitter and on the actuator side consisted of a receiver and associated electronics. The receiver would function for a change in amplitude. However they had a major draw back namely security. Anybody with a transmitter could open or close the garage door. There were many incidents of garage opening by neighbors accidentally when they were trying to open their own garages. The next change came with dip switches. These dip switches could use a total of 256 combinations. This was sufficient to overcome the problem of accidental opening of others garages, however the security issue was still not solved. Anybody with a radio frequency recorder could record the frequency when somebody opened his garage door and later used that frequency to open the garage.

Present day technology has overcome the security concern to a large extent by use of rolling frequency or sometimes called hopping code technology. In this every time a new frequency is used to open and close the door.

Mechanical Part

The mechanical part of the garage door opener is pretty simple. Mainly three types are used: chain drives, screw drives and belt drives. Chain drives are noisy but are the cheapest. Screw drives have a lead screw and nut system to open and close the door. They are a bit costly. The latest models use plastic liner on the tracks to reduce noise and increase the operation speed. Belt drives are the quietest and are comparatively costly. The mechanism also consists of a main spring that is the most important element of the system. Usually two types of springs are used linear expansion and torsional springs.

In the market two types of garage door openers are available namely jackshaft type and trolley type. Even though the jackshaft type occupies less space, the trolley type is more popular. This is because of safety; in the jackshaft type it is difficult to sense when a person or a pet is being crushed under the door.

Some modern systems have auto reverse in case of obstruction like a pet or a vehicle. The remotes generally operate up to a range of 150 feet. Also most systems have keypads that are installed outside the garage and can be used if the remote goes dead.