Insane, insane, insane, this time thing. None of it when I need it, yet it eats me up.
Whoosh. Zoom ahead a year or three and here I am with a new project to write about. These posts always seem to appear at the end, when everything is settled and accounted for. Maybe next time I will actually BLOG and show intermediate results. No matter. This week's prize is an 8-channel audio amplifier that sounds positively cacaesque but which may be used to effectively heat up wires, turn on motors, flash lights or similarly enervate any simple electrical thing needing 13 volts or less. Just don't plug it into a speaker (unless you're one of those noize types who likes cacacacacacaphony.) Oh, and don't forget one or two 15-volt power supplies to provide the juice.
This is the SonOBee.
I have spent almost 8 months designing, simulating, breadboarding, testing and finally drawing this thing in Eagle schematic software. Tonight I sent off the design files to a PCB prototyping house, BatchPCB. The actual boards should arrive in a few weeks. Then the soldering starts. Lead and tin smoke will fill my basement, shortening my lifespan but...what fun!
Here's a color rendering of the amplifier board as it will never appear in real life. But you like color, don't you?

Reason for the widget? My pal Max (who now has his own Wikipedia entry) is building a musical instrument that uses MuscleWire instead of regular guitar strings. The key feature of MuscleWire is that it contracts when heated. Max's instrument has eight strings, each plucked by its own motorized "finger", and each heated by a separate electric circuit driven by a car stereo amplifier. As the wires heat , they contract and change pitch, giving rise to the eery sounds you can hear for yourself on YouTube...
I call my amplifier the SonOBee because it doesn't sing, it buzzes. Right. There may also be a pun there. If it works as advertised, the SonOBee will replace two car stereo amps for all your non-musical car stereo needs. It will be smaller, lighter and more efficient. Comes in a black and aluminum case that someone with art talent really needs to help me decorate.
And if it doesn't work, it'll make a helluva bangle on the rear-view mirror.
If you want one for Christmas or whatever, they cost about $100 bucks. Write me.








