justDIY Project Log

Thoughts, ideas, projects, pictures.
 
 
 

Some space to write down what I was thinking about when I designed or photographed something.

Archive for the 'Prototyping' Category

LED Matrix Backpack

Tuesday, April 10th, 2007

I had purchased some huge (2″) 5×7 matrix a while ago, as part of my led sensor research. They’ve basically been banging around the lab since, getting pins bent and such. So this past weekend, I decided to put them to some other use. Their pin layout is sort of weird, it [...]

Popularity: 23% [?]

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Big Ugly SMPS

Saturday, December 30th, 2006

Usually my designs strive to create tiny boards, and I often obsess for days fine-tuning, shaving a fractions of an inch at a time. However, this design goal was get it done, get it working, then make it pretty.
I’ve been trying to build a switcher to provide a portable power source for PDA’s, cell-phones, [...]

Popularity: 35% [?]

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Switchmode LED Driver

Tuesday, December 19th, 2006

This is the second incarnation of my tps61040 based LED driver (here and here). As I wrote just a few posts ago, I’m trying out a new layout strategy to make my gizmos more breadboard friendly.
The 300 mil (thanks Dave) DIP16 package proves to be very small, so small I had trouble trimming it [...]

Popularity: 31% [?]

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