On Wed, 17 Oct 2007 [EMAIL PROTECTED] wrote: > Why do all (that I've found) light-measuring circuits based on the DS2438 > use reverse-biased photodiodes, rather than, say, a photoresistor? Either > way you could have a fixed sense resistor between the Vs+ and Vs- > terminals.
No idea, but I just used some LEDs as minisolar panels and a resistor to make it a current source. The current from an LED is very nearly proportional to the number of photons. njh ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
