How to Make a Mini Microphone

Written by austin cross
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How to Make a Mini Microphone
Headphones like these work well for this project. (headphones image by Darko Draskovic from Fotolia.com)

A mini microphone can be created out of old headphones. Speakers function similarly to dynamic-type microphones; instead of taking an electrical current and converting it to magnetic vibration, you will be turning sound into a magnetic vibration, which will turn into electrical current and can be recorded.

Skill level:
Easy

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Things you need

  • Old headphones
  • Thin speaker wire
  • Wire stripper
  • Electrical tape
  • 1/8-inch mono male adaptor
  • Scissors
  • Soldering iron
  • Solder

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Instructions

  1. 1

    Pull one earphone off your headphones. If necessary, snap it off until you have one small speaker in your hand.

  2. 2

    Cut the wire connected to the speaker about 5 inches from the speaker.

  3. 3

    Strip away the protective rubber coating. This should expose one copper wire and one white wire.

  4. 4

    Strip the white wire. You should now have two copper wires.

  5. 5

    Strip both wires on your thin speaker wire on both sides. About 1 inch of wire should be exposed.

  6. 6

    Twist the speaker wire with the white stripe running along it around the white wire coming from the speaker.

  7. 7

    Wrap the twisted wires with 1 inch of electrical tape.

  8. 8

    Repeat this process with the remaining wire.

  9. 9

    Unscrew the body of your 1/8-inch male adaptor. This should reveal two contacts.

  10. 10

    Solder the two remaining speaker wires to these contacts. Melt a tiny puddle of solder into the contacts and stick each wire into the hot puddle of melted solder. The white-striped wire should be soldered to the longest contact.

  11. 11

    Plug this new microphone into your tape recorder's microphone input and speak into it to test.

Tips and warnings

  • Slide the body of your 1/8th-inch male adaptor down the wire before soldering so that it may be screwed back on afterwards.
  • It is illegal to record your conversations in some states without receiving permission from the person you are conversing with first. Check your local state laws before recording other people.

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