- #1
rusty009
- 69
- 0
Hey, I have this QTI sensor ( circuit is shown, the left schematic ) and I am trying to get it to detect a white line only, no red,blue or green just a white line. 5 volts is applied to the pin called White(top pin). Now when the IR light is emited from the IR LED will the Ie, emiter current from the photo transistor, be greater or smaller than it would be if there was a black surface underneath it ? Thanks.