Real Sound Cookery – Make a contact mic with baking soda and cream of tartar. | leafcutterjohn.com

August 22, 2011 | Amateur Science, electronics, Music | By: Mark VandeWettering

A couple of months ago, Collin’s Lab featured a story about making your own piezoelectric crystals from Rochelle salt. Collin stopped short of making an actual microphone though: he just demonstrated that the salt crystal would generate a series of voltage spikes when whacked with the handle of a screwdriver. Leafcutter John followed pretty much the same recipe to make crystals of his own, and then clamped the crystal between the jaws of a little panvise, and hooked it to an audio amplifier. When a small music box was held near the crystal, a surprisingly high fidelity recording resulted. Check it out!

Real Sound Cookery – Make a contact mic with baking soda and cream of tartar. | leafcutterjohn.com.

Share Button
Be Sociable, Share!

Write a comment






nine × = 54