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Unread 03-04-2012, 11:16
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DonRotolo DonRotolo is offline
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Re: homemade encoder issues

I'm thinking that your grounding resistor of 1M is too high, and so the phototransistor's leakage current is raising your Voff very high (3.8V). Try 10k or 100k on the bottom and see what happens.
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