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tanky321
Joined: 02 Jan 2008
Posts: 32
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 29 Jan 2009 3:45 Choosing a transmitter/reciever |
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Im new to the whole RF area and I have no idea as where to start.
My ultimate goal is to use an infared remote control, remove the led and install a optocoupler in its place. Then use that as a serial input into the RF IC. At the receiver end I would change back to IR.
Im looking for some guidance, ive been looking at the TI cc1150. Im not sure if this is exactly what im needing though. Heres the data sheet.
http://focus.ti.com/lit/ds/symlink/cc1150.pdf
Thank you!
Andrew
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biff44
Joined: 24 Dec 2004
Posts: 1835
Helped: 244
Location: New England, USA
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29 Jan 2009 9:36 Re: Choosing a transmitter/reciever |
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| It might be over kill. I would set it up for OOK (On-off keying) modulaton, since that is what is coming out of the IR transmitter.
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tanky321
Joined: 02 Jan 2008
Posts: 32
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29 Jan 2009 11:14 Re: Choosing a transmitter/reciever |
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Thanks,
Now ook using this same ic, or do you think there is another one better suited to the application?
Where in New England are you from? Im from MA.
Andrew
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kspalla
Joined: 19 Aug 2008
Posts: 848
Helped: 140
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29 Jan 2009 14:16 Choosing a transmitter/reciever |
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| You need to use two ICs one TI cc1150 and the other to convert the serial info to IR mode. Find the suitable second IC .
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tanky321
Joined: 02 Jan 2008
Posts: 32
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30 Jan 2009 22:58 Re: Choosing a transmitter/reciever |
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This is probably a really basic question but, is the output of the receiver the same serial feed that is input on the transmitter side?
Also, would this work a little better than the TI?
http://www.rfm.com/products/data/tr1000.pdf
Thank you!
Andrew
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biff44
Joined: 24 Dec 2004
Posts: 1835
Helped: 244
Location: New England, USA
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30 Jan 2009 23:09 Re: Choosing a transmitter/reciever |
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Actually that is a pretty good question. The output of the receiver HAS TO BE exactly the input to the transmitter. You want to make sure that the transmitter does not corrupt the digital data any way, such as adding a header, or changing any ones into zeros for Manchester coding, etc.
The RFM is a good one. A lot of transmitters for such things run at 312 or 430 Mhz range. They are typically crystal or Saw resonator oscillators that are simply turned on/off.
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30 Jan 2009 23:09 Ads |
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tanky321
Joined: 02 Jan 2008
Posts: 32
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31 Jan 2009 0:27 Re: Choosing a transmitter/reciever |
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Cool, im gonna order the RFM. Now I can use the same one for receiver/transmitter right? Im pretty sure its a transceiver.
You know whats funny, is that if it in fact did change the the signal it would be ok. Weird, yes, but il explain why. Its gonna be used for a Leviton lighting control system, the cool thing about the controller is that it can learn any IR signal, as long as its in the 38kHz range. Its pretty neat.
Thanks for your time!
Andrew
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