A transmitter is an electronic device which, usually with the aid of an antenna, propagates an electromagnetic signal such as radio, television, or other telecommunications. In other applications signals can also be transmitted using an analog 0/4-20 mA current loop signal.
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SmartHome Heavy Duty, Outdoor Outlet Receiver with Key Chain Transmitter |
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Control lighting and appliances throughout your SmartHome with this integrated line of GE wireless SmartHome Remote Controls. Introduce additional GE SmartHome Transmitters and Receivers to your system anytime and control a countless number of devices... |
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Holiday Living 4 Piece Outdoor Combo Pack. 3-Outlet Ground Stake, 2 Flood Light Holders, & Outdoor Remote Control Outlet with Transmitter Great for Security |
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This 4 Piece Combo Pack from Holiday Living contains all the items you will need for an easy holiday display or added security at the touch of a button. Unit is made for outdoor use, but remote outlet can be used indoors for a wide variety of applications... |
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Skylink WS-100/WS-100N Wireless Remote Control, Channel AReviewsThe switch worked ok, but something in our area kept tripping it. We were trying to use it to help staff in our office to reset our internet router when things werent working. The router is locked in a phone room, so we figured we could get this wireless remote. However, once installed, it just kept turning itself on and off. We ended up having to get a custom switch wired in instead. I bought a few of these remotes for Christmas. ( 3 or 4) All of them, but one, worked. Since it was a very busy season, I didn't have the time to send it back. It ended in the garbage. This shows "lack of quality control". Works every time with one push of button and inside home aiming out the window to the switch which is 45 feet and around side of the wood shed. I use it to turn off a small pump that pumps water out of rain barrel to a series of bamboo pipes that are split with water running from pump and back to barrel for a constant water feature for the local birds. I did leave it run 24 hours but decided the birds sleep so why run it. Also when it freezes I lose all the water in the 55 gal barrel which ends up as beautiful ice sculpture but then when thaws the birds have no water. Now when I know its going to be very cold I shut it down from the kitchen window rather than go out in the cold and pull the plug. I have ordered two more of them, another A channel and a B channel,I have a bird bath that has a pump in it too on the way to the fore mentioned pump so will not use the 24 hr timer I bought for that and put the A channel so both will be turned on with one remote. There is not enough lighting in my garage. This device enable you to control the lights in wireless remote control. I use it to control fluorescence light, and it works out beautifully. You dont' have to hire contrator to do wiring anymore because of this clever design. Need to consider the circuit overload problem and make sure the electric device you want to control is within specified limit. I purchased this so I could turn off Christmas inflatable decorations on windy days and still leave the other decorations lit. I could not mount it so it was placed on the ground under the inflatable in a ziplock baggie. We had no moisture problems. We did often need to hit the remote repeatedly to get it to turn on, but I'll attribute that to being under the decoration instead of mounted. Average Rating: |
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Control plug-in devices through walls, from your car or garage. No wiring required, easy installation. Receiver plugs into any 3-prong grounded standard outlet. Operation range of 100 feet. Max. Resistive Loading: 960W... |
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Python 872 Responder LE Security/Remote Start SystemReviewsI purchased a new car with a manual transmission a year ago. Having had a remote start in my previous vehicle, which was also a manual, I decided to get another. After searching I wanted something with an alarm and remote start. The bells and whistles were nice as well, including remote paging. When I got the unit, I quickly set to work to install the system. What I do not like is that amazon sells units like this under the guise that DEI will NOT warranty or support anything that isn't sold/purchased/installed by one of their authorized dealers. After figuring that out in hindsight, I knew I was out of luck for support or help. Once I had the unit installed, and the shutdown sequence for the manual transmission figured out, it worked alright. Then after two, to three days, the unit decided to start to act up. The remote start sequence requires that the car be running, doors closed, in neutral, then depress the brake pedal, and then while holding down the brake pedal, engage the e-brake, then release the brake pedal, then press the remote start button on the remote. The lights will flash, the green light on the remote will light up, you can now take the key out of the car, get out, shut the door, and walk away. The car will still be running until, you press the lock button. That locks the doors and turns the motor off. Well, I've had problems where the car won't shut off after the above sequence was performed. Where you have to press the remote start button again to get the car to turn off. This only makes the alarm go off full blast the next time you try to remote start the car. Then you have to go back outside and perform the sequence again. Sometimes it doesn't even take, and you have to repeat it again and again. I'm finishing this review off by saying, I was successful in the sequence at work this morning, but when I got back, I noticed that the sequence was broken because the alarm went off again. When I asked around, nobody had gone near the car. This isn't the first time, as the alarm has gone off at random times as well in the day. Overall quality of the unit, is nothing more than a circuit board inside a black box, and two remotes. One will allow two way communications, the other is a dummy remote that does one way communications. The buttons on the remote are cheap and flimsy and do not work very well. Also, the manual for install and use, has several spelling mistakes, along with being written by someone who has not clearly installed the unit before. Some steps come before others in reverse order, it was very confusing, remember to test everything and solder all your connections. In the end, I am very dissatisfied with this DEI product and will not be purchasing another unit from them again, or through Amazon.com for that matter. Average Rating: |
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24-channel security/keyless entry/remote start system * package includes module, one 5-button transmitter/receiver, one 5-button transmitter, a shut-down toggle switch, 2-stage shock sensor, 6-tone siren and harnesses * 2-way transceiver confirms commands and system triggers with flashing LEDs and has a range of up to 2,000 feet * remote start can be configured for manual transmissions * 4 remote-controlled auxiliary outputs * starter anti-grind (starter interrupt must be installed) * automatic window roll up * silent mode warns you of a break-in by paging only -- no siren * remote transmitters have multi-car capability * |
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Dakota Alert Wireless Rubber Hose Driveway Sensor (Transmitter Only) |
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Don't be caught unaware by unexpected visitors. The Dakota Alert Wireless Rubber Hose Driveway Sensor Transmitter will send an instant alert from the foot of your driveway when a car enters your property... |
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Optex Wireless Indoor/Outdoor Entry Alert Security Transmitters |
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Add up to 2 additional Optex® Wireless Indoor/Outdoor Sensor Transmitters to your system to monitor up to 3 different points of entry or sensitive locations. |
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Transmitter types
In radio electronics and broadcasting, a transmitter usually has a power supply, an oscillator, a modulator, and amplifiers for audio frequency (AF) and radio frequency (RF). The modulator is the device which piggybacks (or modulates) the signal information onto the carrier frequency, which is then broadcast. Sometimes a device (for example, a cell phone) contains both a transmitter and a radio receiver, with the combined unit referred to as a transceiver. A common consumer electronics device is a Personal FM transmitter, a very low power transmitter generally designed to take a simple audio source like an iPod, CD player, etc. and transmit it a few feet to a standard FM radio receiver. In the USA, most personal FM transmitters fall under Part 15 of the FCC regulations to avoid any user licensing requirements.
In amateur radio, a transmitter can be a separate piece of electronic gear or a subset of a transceiver, and often referred to using an abbreviated form; "XMTR".
In industrial process control, a "transmitter" is any device which converts measurements from a sensor into a signal to be received, usually sent via wires, by some display or control device located a distance away. Typically in process control applications the "transmitter" will output an analog 4-20 mA current loop or digital protocol to represent a measured variable within a range. For example, a pressure transmitter might use 4 mA as a representation for 50 psig of pressure and 20 mA as 1000 psig of pressure and any value in between proportionately ranged between 50 and 1000 psig. (A 0-4 mA signal indicates a system error.) Older technology transmitters used pneumatic pressure typically ranged between 3 to 15 psig (20 to 100 kPa) to represent a process variable.
Generally and in communication and information processing, a transmitter is any object (source) which sends information to an observer (receiver). When used in this more general sense, vocal cords may also be considered an example of a transmitter.
