Post by thread:Person detector module

<snip> > >Complete ready to go motion detector modyule only requires a small speaker >and 4.5VDC (3 batteries) to operate. Unit uses sophisticated IC to detect >tiny changes in the ambient light level as an intruder comes near >(works up to 10 feet away). It then sounds an alarm tone for a preset >time period from the speaker and then resets itself. Comes with complete >simple hookup info. > >Obviously this module will only work in a litup area. Not necessarily. I've got a similar device for when I go backpacking. It's an infrared (PIR) detector with an alarm which sounds for about a minute. Mine also has a 'keyfob' infrared switch to activate and deactivate it. I guess these boards came from something similar. Keith. >Cheers >-- >Kalle Pihlajasaari spam_OUTkalleTakeThisOuTdata.co.za ========================================================== Keith Dowsett "Variables won't; constants aren't." E-mail: .....kdowsettKILLspam@spam@rpms.ac.uk Phone: 0181-740-3162 Fax: 0181-743-3987 Snail mail: MRC Clinical Sciences Centre, Cyclotron Unit. Hammersmith Hospital. London W12 0NN.