Oops! Installed red LEDs backwards

[Ben Combee]

Grrr, arghh! I finished assembly of the MakerBot Watch tonight, and I
ended up installing the red LEDs backwards. I had seen the warnings,
but I misinterpreted them and relied too much on the picture at
http://wiki.makerbot.com/makerbot-watch which shows the outer rings
with the green dots all in the same direction.

Test software does run, but the red LEDs light at the wrong time. I
think I can fix this in software for most code, since you usually only
light one LED at a time. Normally, to light a LED you set its row to
high and its col to low. To light these, you need to set the col to
high and the row to low. So the key is to clear the row/cols to
either all high or all low before then setting the row/col pair
depending on which way current will flow to the LED you want to light.
I'll probably alter my MakerBotWatch.h class to let you compensate
for this.

[Daniel]

Hate when that happens.... You may just want to spend the time
flipping those LEDs (good practice) to save yourself software heart-
ache later...

On Dec 15, 12:10 am, Ben Combee <ben.com...@gmail.com> wrote:
> Grrr, arghh!  I finished assembly of the MakerBot Watch tonight, and I
> ended up installing the red LEDs backwards.  I had seen the warnings,

> but I misinterpreted them and relied too much on the picture athttp://wiki.makerbot.com/makerbot-watchwhich shows the outer rings