|
Thanks for your help, my point of confusion was the changing around of
the ratio which was not intuitive to me. In case anyone else (like me) needs a more explicit explanation, the equation is simply a ratio (using S1087): Isc = Short Circuit Current 1 lx / I = 100 / Isc 1 lx = 1 / Isc * I * 100 = 1 / (.16 * 10e-6) * I * 100 = (1 / .16 ) * (1 / 10e-6) * I * 100 = .625 * 10e6 * I * 100 = .625 * 10 * 1e6 * I * 100 = .625 * 1e6 * I * 1000 Thanks again Rob, Frank Robert Szewczyk wrote: The values from the S1087 and S1087-1 datasheets: The constants come from the table on the first page of the datasheet, where the manufacturer lists the current output at 100 lux.Best regards, Rob On 9/11/07, Frank Maker <[EMAIL PROTECTED]> wrote:Hello, I'm working with a set of MoteIV Tmote Sky motes and I'm wondering if anyone can explain how the light sensor conversions are derived from the datasheet for the light sensor (S1087 & S1087-01)on their website: S1087 lx = 0.625 * 1e6 * I * 1000 S1087-01 lx = 0.769 * 1e5 * I * 1000 From: http://www.moteiv.com/community/Getting_Data_from_Tmote_Sky's_Sensors I've looked over the datasheet many times and I'm confused about where the first scaling factors (i.e. 0.625 & 0.769) come from? Thanks, Frank Maker [EMAIL PROTECTED] _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help |
_______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
