cpt591

The first one please. Thanks again to everyone for all the help.

Oh my god, that is a great idea! I dont know why I didnt think of something like that. But that is exactly the sort of idea I was looking for. Now I dont suppose you have a schematic of a circuit like this? I guess I could probably figure it out. But if you do have one that would be great also. Thanks again.

I am trying to attatch my IR circuit but I dont know if it is going to work. So if you want it give me your e mail and I will send it. Thanks for everyones replies. I should have specified that I am working with a small model. The street is only four inches wide, and the cars will be hot wheels. So a strobe system might work, but it could prove to be hard for such a small model. I think the sound may work. Does anyone have a good schematic for this? Thanks.

Hello, I am building a school project that uses a PIC to control a traffic signal. In my model I need to create a way to recognize when emergency vehicles are present. I am currently using a simple IR circuit accros the streets to detect when cars are present. But I need something that can distinguish between regular cars and emergency ones. I was thinking an IR circuit might work. Just place TX in vechile and RX anywhere in the vicinity. But I can not find a simple circuit to do this with. I am not set on IR, so I would appreciate any ideas. Thanks.