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<blockquote data-quote="ArloG" data-source="post: 1164375" data-attributes="member: 418555">Good job. I'd like to ask. Are you using a photoemitter/detector module or a true Schmitt trigger output?I only noticed because a true photoswitch would have only 3 terminals. I figure you already know it but still have to expand on it.If it is in fact the first one. If the motor were to stop on &quot;half exposed/half blocked&quot; on the trigger wheel. You may have a signal in no-mans land on the output.In other words. If you slowly block the beam and check the output with a multimeter. Voltage (or current) would proportionally change.If you use a Schmitt trigger with an NPN sinking output. Blocking the beam would keep the meter reading steady until a threshold was reached.And the reading would &quot;snap&quot; to close-to 0 ohms, or snap open circuit when unblocked.. Just like&nbsp; reed switch would.It could be the other way around. But the function is still the same. Snap open, snap closed.Just had to add that. Looks like it's coming along nicely.</blockquote>

[QUOTE="ArloG, post: 1164375, member: 418555"] Good job. I'd like to ask. Are you using a photoemitter/detector module or a true Schmitt trigger output? I only noticed because a true photoswitch would have only 3 terminals. I figure you already know it but still have to expand on it. If it is in fact the first one. If the motor were to stop on "half exposed/half blocked" on the trigger wheel. You may have a signal in no-mans land on the output. In other words. If you slowly block the beam and check the output with a multimeter. Voltage (or current) would proportionally change. If you use a Schmitt trigger with an NPN sinking output. Blocking the beam would keep the meter reading steady until a threshold was reached. And the reading would "snap" to close-to 0 ohms, or snap open circuit when unblocked.. Just like reed switch would. It could be the other way around. But the function is still the same. Snap open, snap closed. Just had to add that. Looks like it's coming along nicely. [/QUOTE]

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