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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'>>></span><span lang=EN-CA> I'd use two LEDs next to each other, and two receivers next to each other, and read both .... 00 is blocked 01 or 10 is passed. 11 shouldn't happen.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'>I cannot do that because of the height of each square holes on the brass reading bar..<br>See this photo.. each square holes cannot accommodate 2 receivers.. only one optic fiber each so one receiver each allowed.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'>Thanks anyway for your comment !<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'><img width=1047 height=471 style='width:10.9062in;height:4.9062in' id="Image_x0020_2" src="cid:image002.jpg@01D8F5C7.F53507E0"></span><span lang=EN-CA style='mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-CA>De :</span></b><span lang=EN-CA> Pete Hartman <</span><span lang=FR><a href="mailto:pete.hartman@gmail.com"><span lang=EN-CA>pete.hartman@gmail.com</span></a></span><span lang=EN-CA>> <br><b>Envoyé :</b> 11 novembre 2022 10:18<br><b>À :</b> Jean-Pierre Desrochers <</span><span lang=FR><a href="mailto:jpdesroc@oricom.ca"><span lang=EN-CA>jpdesroc@oricom.ca</span></a></span><span lang=EN-CA>><br><b>Cc :</b> </span><span lang=FR><a href="mailto:Synth-diy@synth-diy.org"><span lang=EN-CA>Synth-diy@synth-diy.org</span></a></span><span lang=EN-CA><br><b>Objet :</b> Re: [sdiy] Reading holes (voids) on piano paper rolls.. </span><span lang=FR>using Photo-transistors and PIC micro..<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>I think the suggestion of using more light from up thread is a good one.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I'd use two LEDs next to each other, and two receivers next to each other, and read both .... 00 is blocked 01 or 10 is passed. 11 shouldn't happen.<o:p></o:p></p></div></div></div></div></body></html>