Revision history of "File:Infrared-photogate-circuit-diagrams.png"

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  • curprev 11:13, 9 May 2014‎ Shawn talk contribs‎ 247 bytes +247‎ Symbolic diagrams for active-low and active-high photo-gates, used for marking the passage of objects between a light source and a phototransistor sensitive to that source. An NPN transistor is used to provide a clean signal for micro-controllers.
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