Build a Simple WiFi Detector

Lazlo shared this great little circuit. It is a WiFi sniffer that uses two transistors and few other easy to find parts. It is not tuned so will pickup stray RF signals from microwaves, phones, etc but that is the trade off of such a simple circuit.

This entry was posted on Friday, October 3rd, 2008 at 6:04 am and is filed under rf & rfid. 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.

5 Responses to “Build a Simple WiFi Detector”

  1. Amos Says:
    October 9th, 2008 at 6:18 pm

    When are people going to learn that simple line drawings like schematics DO NOT BELONG IN JPEGS!? There is a reason we have PNGs and (to a lesser extent) GIFs, people!

    Sorry, rant over… ;)

    That aside, this is a great circuit! Many thanks to both Lazlo and HacksOnly!

  2. Amos Says:
    October 12th, 2008 at 7:48 pm

    Oops, sorry… I’ve only been reading this site for a while. I of course meant “OnlyHacks”. :P

  3. shinshin Says:
    January 4th, 2009 at 7:42 am

    i am currently working on a WiFi detector project.Just wondering is this circuit suitable to use?

  4. shinshin Says:
    January 21st, 2009 at 1:46 am

    Hi, I am trying to built the circuit. However, I couldn’t find L1 : 1nH, L2 : 2.2nH.The smallest value of inductor that I can find is in Mili unit. Can you suggest any other component to replace them?

  5. miked Says:
    January 24th, 2009 at 10:21 am

    What about Digi-Key Part Number 712-1424-1-ND? That one is SMD but appears to have a few styles.

 

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