DIY Spy Megaphone Hack Video

DIY Spy Megaphone Hack

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Member Since:

12/7/08

By: Kipkay Videos

I make internet videos that reflect my interest in technology, gadgets and DIY solutions to everyday problems.

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How to videos/ Tech videos/ DIY videos

Views:59,288 Rating:4 Comments:3

DIY Spy Megaphone Hack -

Make a bionic hearing spy device by hacking a megaphone! Distributed by Tubemogul.

DIY Spy Megaphone Hack -

Make a bionic hearing spy device by hacking a megaphone! Distributed by Tubemogul.

Added:

12/7/08

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DIY Spy Megaphone Hack bionic hearing spy device bullhorn hack Megaphone Hack Spy Megaphone Hack kipkay

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By: Guest 4 months ago

Simply buy the electret microphone element from where you got the socket, fit it into the base of a 2L coke bottle, having cut off the top half of the bottle and wire it up to an opamp with a gain of around 1000. Most will have a BW wide enough for speech at this gain. Plug in a pair of headphones with both transducers wired in series (to give around 72 ohms impedance for the opamp to work into) and you will be able to pickup insects crawling meters away..

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By: Guest 4 months ago

ya, but it would work better with a different shaped cone than that!

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By: Guest 6 months ago

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