Helpful voltage control relay for High-Risk Applications
Reliable voltage control relay Designs for Industrial and Industrial Applications
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rEaLiTy asked How can i used a RF reciever to control a relay which would control an AC lighting unit?
I am trying to design an RF transmitter of very low frequency to make contact with a RF reciever, so when the frequency is obtained by the reciever, it would then turn on the relay which would power on the lights in a certain room of the house. Any help is appreciated. Thanks, this is for my Electronics Senior Project undergraduate level
And got the following answer:
Just tune the receiver to the proper frequency and amplify it via RF amp, or IF amps. Then detect with a RF diode, and use the DC voltage to drive a transistor that activates the relay. But only certain frequencies are allowed to be used for this purpose, so check with the various government regulations. I don't know of any that are "very low frequency", which by definition is 3 kHz to 30 kHz. This is a very difficult range to work with as the antenna has to be many miles long. To avoid false triggering, you may want to modulate the RF with a specific audio frequency and detect that frequency in the receiver. Or a specific pulse sequence for a more elaborate setup. But 30 kHz is so low that it is difficult to modulate. PS, you can buy these units, fairly cheaply. .
The voltage control relay function very effectively with unique applications that are distinct to power distribution and protection. The relays come with wide adjustment ranges using a scale that’s simple to study either in three or 4 digits based on the model. These voltage control relay support in increasing the flexibility with the applications, lower the all round energy and upkeep charges. You can find relays that are utilized for common purposes which are available in dependable styles with speedy replacement choices. And you will find models which are used for industrial applications and heavier duty applications that perform on huge loads. These solutions are created to meet the lifetime industrial handle demands on the applications.
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