I read somewhere you could do it with a video camera I thought... I'm sure its not too tough =P andrew ----- Original Message ----- From: "Shawn Wilton" To: Sent: Monday, June 14, 2004 1:47 PM Subject: Re: [OT]: detecting emergency vehicles > Those frequencies are extremely easy to find and iirc both are in the > double digits. > > > Edward Gisske wrote: > > > Gus, > > > > It was patented by 3M Safety and Security division as the "Opticom" system > > a long time ago. The detectors are the little black cylinders about 3" OD x > > 5" long with 1 or 2 snorkels coming out of them in a horizontal plane that > > sit on top of the stop lights around fire stations. They respond to two > > different frequencies of strobed infrared light pulse trains. One is for > > emergency vehicles and the other one is for alderman and other less > > important uses. Yes, I know the frequencies. No, I can't reveal them due to > > a non-disclosure agreement. It is a pretty slick system (in all modesty), > > and works up to 1/4 mile away. > > > > Edward Gisske, P.E. > > Gisske Engineering > > 608-523-1900 > > gisske@offex.com > > > > ----- Original Message ----- > > From: "Gus S.Calabrese" > > To: > > Sent: Monday, June 14, 2004 11:34 AM > > Subject: [OT]: detecting emergency vehicles > > > > > > > >>Hello Gurus > >> > >>I think that emergency vehicles are detected at > >>stoplights. Is there a standard way this is done > >>that can be adapted to a PIC ? > >> > >>Is emergency vehicle detection a patented process ? > >>Can anyone use it in a product ? > >> > >>Gus S Calabrese > >>303.964.9670 vm 303.908.7716 cell no vm > >>www.omegadogs.com > >>4337 Raleigh St > >>Denver, CO 80212 > >> > >>-- > >>http://www.piclist.com hint: To leave the PICList > >>mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > > > > -- > > http://www.piclist.com hint: To leave the PICList > > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu