Marios Andreopoulos writes:
A few days ago I wrote a blog post about Arduino and EMI. By using fast PWM and a plain breadboard wire, I was able to detect electromagnetic interference using a usb TV tuner, with its antenna near my circuit. Not only that, but by manipulating duty cycle to create a primitive form of amplitude modulation, I was able to transfer through EMI a very simple audible signal (few notes of one of the most famous riffs) in many frequencies and up to 1.76GHz
Via the contact form.
Check out the video after the break.
Only 2 days ago I was wondering whether I could do primitive EM checks on my circuit with an rtlsdr dongle. Seems like it would work rather well.