A stethoscope, often considered the symbol of a doctor's profession, but also used by safe-crackers and auto mechanics to hear sounds that otherwise couldn't be heard. Well, it's time to make a high-tech electronic spy stethoscope. You can hear and record heartbeats with this spy gadget, or even listen through walls!
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You Will Need :
- Stethoscope
- Pair of Multimedia Microphones (for the mini condenser mic)
- Hot Glue
- Mini-stereo Y-adapter
- Digital Recorder or MP3 player/recorder
Process :
I disassembled the multimedia microhones using an X-Acto knife and assorted tools. I cut it down the middle to get to the cabling and also popped the top off the header to get the mics out. I ended up with 2 mics and 3.5mm connectors.
Remove the earpieces from the Steth. Then I drilled out the earpieces to the diameter of the mic housings. I used a Dremel with a grinding attachment to fine tune it.
I used a small dot of hot glue and inserted the microphones into the earpieces and then reassembled the earpieces on the Stethoscope.
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Remove the earpieces from the Steth. Then I drilled out the earpieces to the diameter of the mic housings. I used a Dremel with a grinding attachment to fine tune it.
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I used a small dot of hot glue and inserted the microphones into the earpieces and then reassembled the earpieces on the Stethoscope.
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After plugging the two 3.5mm connectors into the Y-Adapter and then plugging the single stereo connector into my MP3 player
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