Range Finder help ??????????

[shivamkalra]

Hello friends, i'm trying to make an autonomous car using pc's parallel port and ir range detector...what i want is that IR reciever should give +5v to input of parallel port as soon as a object comes near to it... i search the internet alot but did't help me out, most of the range finder circuits are dealing with analouge signal ... any help and suggestion would be appreciated


Thanks and Regards
Shivam

[superchiku]

u just want to give 5volt when the object comes near it,, ,,connect it to micrcontroller ...and let the mcu output 5v through one of its digital o/p pins when ever the object is too near...

[Webbot]

Some of the Sharp IR detectors provide a digital output rather than an analogue output. You would need to check their product range as the distance at which a transition from 0 -> 1 happens varies by model.
Alternative, as Superchiku says, use an analogue model and flick a digital output pin yourself.