Hi, i am doing my national certificate in engineering and really need some help in my project. I've decided to design and build a a passive inrared sensor possibly using segmented mirrors to power on a pc. This will only be required to turn on the pc and not to turn it off. I think I will power the detector via a the usb port. I have a few questions that i would be very grateful if anyone could help me with...
1. Does anyone have a similar circuit diagram or a site that would have?
2. Does anyone have a site that sells the necessary components?
3. If i were use segmented mirrors, can i still use a translucent window to prevent accidental activation from things like insects?