Hi all, I'm investigating a way to measure the distance between two pillars/tracks that guide a cage down a mine shaft (resolution 1mm). Intending to use '84 PIC. The cage moves down the mine shaft at +-5 m/s, and thus contact type of sensors would be out of consideration. Could anybody please point me in a direction as to do these measurements, and if somebody maybe has some code that i could modify/addapt to do the job, i'd be intrested. regards, -- __\/__ / ^ ^ \ (\| (o)(o) |/) ------------------------oOOOo--oo--oOOOo---------------------------- | Danny Stemmet | | Internet: | | c/o Spoornet | | DannyS@tnet.co.za | | R & D Signals | | ds@Tweety.rau.ac.za | | 122 Eloff Street | | Telephone: | | Johannesburg, SA | | (27-11) 773-3241 | -------------------------------------------------------------------- | Diplomacy - the art of letting someone have your way... | -----------------------------------Oooo.---------------------------- .oooO ( ) ( ) ) / \ ( (_/ \_) _