And here's the drawing. The exact part number of the sensors are: OPB991T11Z https://www.digikey.ca/en/products/detail/tt-electronics-optek-technology/OPB991T11Z/1637795
These are already set up with a voltage regulator, Schmitt trigger and a driven Open Collector transistor. John Dammeyer > Here's the test setup with the protoboard that took me all afternoon to wire > up. When I'm ready I have a TTL to RS422 driver on it in > case electrical noise is an issue. At the moment it's not populated. >
QuadSensorConnections.pdf
Description: Adobe PDF document
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