Raspberry Pi FM CD-quality stereo xmtr with no extra hardware

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jack
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Raspberry Pi FM CD-quality stereo xmtr with no extra hardware

Post by jack » Wed Sep 06, 2017 12:48 pm

Here's an insanely left-field project - turns a RPi into a CD-quality powerful FM stereo transmitter without using any extra hardware by hacking the spread-spectrum functionality of the board with a kernel driver, plus one GPIO pin :) :

http://www.icrobotics.co.uk/wiki/index. ... ransmitter
Last edited by jack on Wed Sep 06, 2017 1:29 pm, edited 1 time in total.

simon
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Re: Raspberry Pi FM CD-quality stereo xmtr with no extra hardware

Post by simon » Wed Sep 06, 2017 1:14 pm

Quite extraordinary really

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Re: Raspberry Pi FM CD-quality stereo xmtr with no extra hardware

Post by ed » Wed Sep 06, 2017 2:02 pm

I wonder if this exceeds the 50 nanowatt legal limit for the 88-108mhz band?

interestingly I've been installing a couple of remote weather stations using AVRs and broadcasting/recieving on 433mhz before uploading to the web. It's absolutely amazing how busy/polluted the 433mhz band is. Takes a lot of filtering and checksumming to avoid interference......we're doomed I tell you, doomed!
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Re: Raspberry Pi FM CD-quality stereo xmtr with no extra hardware

Post by jack » Thu Sep 07, 2017 8:50 am

ed wrote:
Wed Sep 06, 2017 2:02 pm
I wonder if this exceeds the 50 nanowatt legal limit for the 88-108mhz band?
I presume that was a rhetorical question? :)

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