"They want a simple device they can clip to the front of a led display (7 or 8 seven segment displays) that will transfer the number to their own equipment. " He mentions LED in the original post but you said LCD in your reply. %-) -----Original Message----- >From: Jinx >Sent: Sep 14, 2009 8:33 PM >To: "Microcontroller discussion list - Public." >Subject: Re: [EE] Capturing RFID output data > >>> Apparently they have investigated using a camera in a box, hung on >>> the front of the dairies display, and then using an OCR program to >>> identify the number >> >> Roger, I've tried reading an LCD optically (not a camera). It's not easy >> or reliable. A lot of unwanted reflection and difficult to pick up individual >> pixels > >BTW Roger, it didn't come to me before but I've just remembered what >I was trying to do. The intention was to monitor the activity on an EFTPOS >terminal (quite legitimately). It's absolutely verboten to interfere electrically >with these terminals and that was one idea. If the project hadn't fizzled out >I might just have tried OCR, as photo-sensors weren't quite good enough > >-- >http://www.piclist.com PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist