Telephone Handset Microphone

Step 3Solder!

Solder!
Solder the circuit as shown in the picture.

If you do not like looking at pictures, then follow these simple instructions:

The red wire on the battery holder goes to the toggle switch. The black wire from the phone jack also goes to the toggle switch.

The black wire from the battery holder goes to the ground terminal on the 1/8" mono jack. The yellow wire from the phone jack goes to the other terminal on the 1/8" mono jack.
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I am the author of the book '62 Projects to Make with a Dead Computer' and Community Manager here at Instructables. I'm always sharing tons of awesome projects. Subscribing to me = fun and excitement!