Fast PWM and electromagnetic interference

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


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.

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.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Derek: Today might be a good day.
  • Andrew: Me !!!
  • Jonik: One more try :-)
  • kurt: Autumn carries more gold in its pocket than all the other seasons.
  • Mol-1: Try again ...