Something Different

Show off any of your RTL-SDR or cheap SDR related projects.
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anomaly
Posts: 1
Joined: Wed Jan 31, 2018 7:46 am

Something Different

Post by anomaly » Wed Jan 31, 2018 9:15 am

I heard that in the 1970's someone found out computers emit a weak radio signal when they're processing things, apparently back then someone was able to somehow program an old Altair computer to play a song on their AM radio in beeps and chirps. I think that sort of thing is really interesting and I'd like to recreate the experiment with modern computer equipment. I have an SDR radio (Model: R820T2 RTL2832U), but I don't know what frequency ranges to search for the RF coming from a computer. So I thought I should ask the community if anyone has an ideas for where I should begin? Or if any of you have one of those meters/detectors that might be able to point me in the right direction? Thanks in advance for your replies.

alkinoy
Posts: 3
Joined: Mon Jan 29, 2018 1:13 pm

Re: Something Different

Post by alkinoy » Wed Jan 31, 2018 5:20 pm


rtlsdrblog
Site Admin
Posts: 2434
Joined: Mon Nov 19, 2012 11:54 pm

Re: Something Different

Post by rtlsdrblog » Thu Feb 01, 2018 4:13 am

Have a look at these posts, some interesting results can be obtained with just RTL-SDRs.

https://www.rtl-sdr.com/transmitting-rf ... n-your-pc/

https://www.rtl-sdr.com/tempestsdr-a-sd ... diated-rf/

Rufty
Posts: 5
Joined: Sun Oct 11, 2015 5:23 pm

Re: Something Different

Post by Rufty » Thu Feb 01, 2018 10:31 am

Well, there's the Raspberry Pi Fm transmitter:
https://www.raspberrypi.org/magpi/raspb ... ansmitter/

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