Saturday, November 16, 2013
We stripped 8 hard drives down the ascertain the most appropriate actuator for our application.
The arm from 4"drive as opposed to 2.5" drive allows more current resulting in greater amplitude this equals higher volume.
We built three versions of cutting head gaining improvements at every step.
A Google search revealed a patent listing that confirmed the problem of an audio dropout at around 8khz due to harmonic resonance introduced by the mechanical clamping of the tiny bearing between the arm and drive housing.
We eliminated the bearing all together, replacing it with a machined piece of flat aluminium clamped to the head between thin rubber shims.
1. You want party-goers to think your costume is cool.
2. You want to trick zombies so they don't eat you.
You will need:
A glue stick
A narrow thing that could penetrate skin
Enough extra skin to make a fold (on a part of your body that you can show people)
You can achieve this effect with just about any narrow object. I used wires and skewers. You could try screwdrivers, shards of wood, scissors, knitting needles, spikes, sticks... surprise me.
It's as simple as applying glue to your skin, letting it dry until tacky, applying the object and pinching the skin shut.
Hold the skin pinched until the glue dries. This seems like it would be painful but it isn't... nearly as painful as actual impaling. The kiddos didn't mind at all.
Next step has all the good pics. Click next.