Olin Lathrop embedinc.com> writes: > Are you sure you were really measuring the air and not hard objects that it > cooled down? The heat from the exhaled breath of the developer is amply enough to set them off even when out of the f.o.v. when sensitivity is set high enough. This is one of the problems with PIRs, they can be set off by sufficiently large and rapid volumes of air moving by them. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist