Kludge Engineering

We completed a quick proof of concept: The photonic fence project has been using an expensive lens and large area photodiode in order to detect wing beat frequency. We knew on paper that this could be replaced cheaply, however, it seemed worth while to do some quick validation. I ordered some $3 fresnel lenses from Ebay, and replaced our large area photo diode with a much cheaper/smaller part. Not only did it work , but we had a AMAZING signal to noise ratio on wing beat signal – - due to the large (8.5×11″) area of the fresnel lens. Total effort of validation: 40 minutes and some tape. Due to X/Y movement of the retroreflected signal from the laser, we will need one more additional (inexpensive) optical element to keep the signal aligned with the photodiode.

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  1. Catherine Light
    Posted May 20, 2011 at 11:49 am | Permalink

    I think this was a great use of an inexpensively available commodity. Nice outside the box thinking, once again.

  2. Jim
    Posted November 20, 2011 at 9:44 am | Permalink

    Is there any chance you will be either licensing this or selling this as a product in the USA? This is something that people want very much. Licensing it in the USA would provide massive funds for your goals. It would also cut down on other diseases passed on by mosquitos in the USA. Everyone I’ve shown this to asked where they can get one.

  3. Bryan
    Posted February 18, 2014 at 5:24 pm | Permalink

    I just read that this project has attracted some criticism from “experts” because of the unreliability of Africa’s (the target market) electricity supply and I can’t help but wonder whether the system could be powered by solar instead of mains power? A few solar panels and a battery pack would allow the device to be deployed in more remote areas where mains power isn’t available and would also allow it to be relocated once an area’s mosquito problem had been sorted out. Even if the battery pack couldn’t hold enough power to run the system all night, having it operating for even four or six hours at a time with a kill rate of between 10 and 100 mozzies per second it will still make a significant impact on the mosquito population – even it is takes a bit longer…

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