Saikatdas1
Newbie level 5
Hi,
I have built a simple on/off switch with IR obstacle detector and pic12f675.The switch program was done to make it immune from Sunlight.What i did in program is that,the ir led will be on in general.when a hand ll come near it,it will drop the voltage at the ir detector led,which is pulled up with some resistor to vdd.so normaly the ir detector's output is high,and when a obstacle come infront,it goes low.next the ir goes off by th mcu and so the detector's output which is put to the internal comparator's cin- leg,is supposed to go up.so false triggering can be avoided by again and again checking the detector output while irled is switching on and off.but after making the ckt,if i throw a torch light on the detector,it repeatedly goes on and off for false triggering by the light.I want to know why this is happening.
i cant use tsop 1738 for housing problemm.
thanks in advanceView attachment 12f675.rar
I have built a simple on/off switch with IR obstacle detector and pic12f675.The switch program was done to make it immune from Sunlight.What i did in program is that,the ir led will be on in general.when a hand ll come near it,it will drop the voltage at the ir detector led,which is pulled up with some resistor to vdd.so normaly the ir detector's output is high,and when a obstacle come infront,it goes low.next the ir goes off by th mcu and so the detector's output which is put to the internal comparator's cin- leg,is supposed to go up.so false triggering can be avoided by again and again checking the detector output while irled is switching on and off.but after making the ckt,if i throw a torch light on the detector,it repeatedly goes on and off for false triggering by the light.I want to know why this is happening.
i cant use tsop 1738 for housing problemm.
thanks in advanceView attachment 12f675.rar
