Jason Morrison

Make stuff.

Kitmakers Class

Monday, Jan 5 2009: Tonight is the first night of nublabsKitmakers course.? I’m excited to see how it goes! I’m primarily interested in building equipment for do-it-yourself biology, such as an inexpensive, high quality gel electrophoresis apparatus. – cut to Thursday, Jan 8 – …and today was the second night.? There were notably fewer people tonight, but it rocked anyhow.? I learned how to use the Bridgeport mill to do basic manual milling and how to use the digital readout, turned some aluminum in a lathe, and watched an intro to MIG welding. Then, with Alex’s help, I put together a variable DC power supply with a variac, bridge rectifier (three of them, actually - but only because we blew two), and a resistor+capacitor to smooth the resulting voltage.? Photos:
[caption id=”attachment_65” align=”aligncenter” width=”300” caption=”Gel box power supply, variable from ~0-200VDC. Variac is on the left; AC voltmeter, bridge rectifier and RC mounted to the board on the right.”]Gel box power supply, variable from ~0-200VDC.  Variac is on the left; AC voltmeter, bridge rectifier and RC mounted to the board on the right.[/caption] [caption id=”attachment_64” align=”aligncenter” width=”225” caption=”Bridge rectifier plus RC with drain resistor for gel box power supply”]Bridge rectifier plus RC with drain resistor for gel box power supply[/caption] [caption id=”attachment_66” align=”aligncenter” width=”225” caption=”Variable DC power supply, all snug in a shelf. Goodnight!”]Variable DC power supply, all snug in a shelf.  Goodnight![/caption]
Next week I’d like to test the power output on an oscilloscope, and start working on building a “draft” of an enclosure.
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