On 08/30/2011 09:50 AM, Bert Freudenberg wrote:
Its proportional because that's how the sensor works. The amount of
light changes the time to bleed off the charge stored in the diode
when you reverse bias it.
Ah, so you use the LED itself to sense light? And then time how long a cycle
takes in the EC? Awesome design!
Yes. Its not the same LED but its the same light pipe. We stuck an
additional LED right next to the WLAN led. Thats why it as to be turned
off during the reading period.
This almost takes the cake over the analog mic hack.
Thanks. Its a nice inexpensive solution.
--
Richard A. Smith <rich...@laptop.org>
One Laptop per Child
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