Electromechanical Transducer Out of a Polystyrene Conical Section!

Step 5 Voice Coil

Use wire snips to cut a 40 inch length of 16 gauge copper wire. Leaving a 5 inch tail, wrap the wire around a AA battery (or similar sized object). Make 14 to 16 wraps total. It is important to make as tight and neat of coil as possible.

Tip - Wire crinkly, bent and hard to work with? Pull the wire tight with both hands and run gently over a sharp edge to straighten.

Technical Terms - This coil will serve as our electromagnet. In speaker terms it is called a voice coil.

Comments

[spark master]

if the wire is short length place on a flat work table place a plank over it and roll it back and forth(like a rolling pin motion). You will preserve the insulation and it gets it very straight. Use this for making darts on job site. worked well.

[chriskarr]

Not a SHARP edge, as in one that could be used to cut something but, instead, something soft, like wood, with a bit of an edge to it (like the edge of your mom's coffee table!).