Documentation question

[The_Don125]

Hey, I'm trying my hand at this whole online project thing again, and I've started work on writing up another project I'm working on. Anyone here mind giving it a look-through to make sure its all coherent? I realize its only about half-done, but other comments and criticisms are welcome.

http://ews.uiuc.edu/~dziems2/lms/index.html

[westfw]

I didn't quite follow the way that the LEDs are connected to each other (your "fold and solder" steps.) Some sort of diagram and/or an actual schematic would be helpful in addition to the photos...

The photos could be sharper, especially LMS2. Looks like part motion blur and part focusing problem? If you have a tripod but not a cable shutter release, you can use the self-timer to prevent camera motion from pushing the shutter button... I'd crop the photos to exclude distracting background.

[oPossum]

Needs more cowbell

...and a schematic.

Brightness may be a problem with 7% duty cycle and ~4 mA per LED (worst case).

What you are doing is multiplexing, but not Charlieplexing.

Charlieplexing can drive (N-1)^2 LEDs with N outputs. Each output is used for both column and row drive.

[The_Don125]

Alright, better pictures and diagrams will come soon. They all probably have some sort of motion blur, I was just taking them freehand. *looks for camera tripod*

Brightness in my early tests is actually fine, plenty of headroom in that respect.

As for the multiplexing vs. charlieplexing, alright. Jut got a little carried away with my terms I guess, thought only charlieplexing used the high-impedance mode, while multiplexing was just binary.