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From: firstname.lastname@example.org (N. Thornton)
Subject: Re: Sending an analog signal using RF components
Date: 28 Oct 2002 13:42:59 -0800
NNTP-Posting-Date: 28 Oct 2002 21:42:59 GMT
email@example.com (kajjeb) wrote in message news:<firstname.lastname@example.org>...
> I need to transmit an analog signal, ranging from 400 mV to 1V, to
> a point 100 feet away.My signal varies constantly(Not only 400mV or
> 1V, can also have any values in between).I also want to have the least
> number of parts possible because of budget limitations and space
> I think that I have 3 possible solutions:
> 1)Send that signal as it is.But I don't think there's a part that can
> send an analog signal by RF??
> 2)Convert that signal into a digital signal.Is there something that
> can send an at least 8 bit digital signal by RF?? I need to be as
> precise as I can.
> 3)Convert that signal into a serial signal.But then I would need a
> clock,a frame with a header,etc..
> So,could anybody tell me if I'm on the right path or if there's other
> solutions that I didn't think of? You could also give me a list of
> components that I could use or links to these parts or solutions.
> You can email me directly to the addresse above
> Thanks a lot,
OK, you've had all the sensible options, now for the strange one. You
did ask :)
Firstly chop the dc voltage so you have an ac signal. Then amplify it
and feed it to 2 metal rods stuck in the ground spaced a few feet
apart. Doesn't need much power.
Now the receiver is just 2 rods in the ground plus a simple sync
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