> I though that using a modulated signal I would not have noise > problems (I don't think that my lamp emits 38 KHz pulses). But > the fact is that I DO HAVE NOISE. These ID receivers are not created equal. I had a lot of noise problems with LiteOn, and much less trouble when we switched brands (don't remember who they are buying it from now). LiteOn recently discontinued their line. Maybe because they couldn't get it right. (I guess the lights are off at LiteOn). Also, these modules tend to need bypass caps accross the power right at the module. ***************************************************************** Olin Lathrop, embedded systems consultant in Devens Massachusetts (978) 772-3129, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads