Squirrels have fuzzy tails.
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guys is it possible to use ir reciver circuit with modulation to detect only fire with out getting disturbed by ambient light variations?
Would writing a software to include a fast rise detection algorytyhm solve your problem? rather than filter out ambient IR, it would just wait until there was an immediate rise in the amount of IR detected and act upon it.
unsigned byte Threshhold= 20 ;unsigned byte IRreading = [readADC];unsigned byte IRreading1;while(1){IRreading1 = [readADC];if (IRreading1-IRreading >= Threshhold){//we must have discovered a fire - do something about it}if(IRreading1IRreading <= Threshold){//the fire must have been extinguished or i cant see it anymore//stop panicking (unless its behind me.. i'd best have a look ::))}IRreading = IRreading1; }