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On Sun, 26 Apr 2009 03:47:04 -0700 (PDT), Antti <...@googlemail.com
A while ago i did some research related to capacitive touch sensing,
and was really surprised to see that this function is offered by
Altera
as ready made solution.
today i was looking at ambient light measurement solutions.
and on the first google search page i found this
http://www.altera.com/literature/wp/wp-01076-led-driver-reduces-power-adjusting -intensity-ambient-light.pdf
cool.
really... no need to think, just look at stuff altera has prepared for
its customers.
hm.. maybe i should make some cool stuff with Altera ICs?
and.. OI I have been so stupid.. with my two last FPGA designs, me
idiot --
i did connect the on board LED one side to the GND!! it could have
been
possible i did even think about it, hm maybe i did, but did not
implement it. Well the
routing was complicated so connecting to gnd was easier
never again, when adding a LED to the FPGA board will always connect
it between
2 IO's then the same LED can be used as input or output device :)
using a LED as sensor when polarity can not be changed doesnt work at
all,
or well, i tried once the pin oscillator without changing polarity and
got no
light sensing (or almost none)
Antti
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