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Fast PWM and electromagnetic interference

Posted on Friday, March 14th, 2014 in Arduino by DP

2014-03-09-Fast-PWM-EMI-the-lab

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

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Check out the video after the break.

This entry was posted on Friday, March 14th, 2014 at 7:00 pm and is filed under Arduino. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

One Response to “Fast PWM and electromagnetic interference”

  1. NsN says:

    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.

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