Photosensor Issue: Troubleshooting Strange Voltage Output with Green LED

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The discussion centers on troubleshooting a photosensor that exhibits varying voltage outputs when exposed to different colored LEDs. When a blue LED is shone on the sensor, the voltage output decreases over time, while a green LED causes the voltage to increase. The user notes that the photosensor is specified to be most sensitive to green light, raising questions about the inconsistent voltage response despite equal light intensity. A participant points out that sensitivity should logically correlate with output, suggesting the observed behavior is contradictory. The conversation seeks clarification on the photosensor's performance and its sensitivity characteristics.
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So me and my partner got these photosensors as part of our project and were testing them today and got some weird results..

We started by shining a blue LED and the voltage output would drop over time.

we then hooked up the green LED and the voltage would rise over time...

From the spec sheet I know that the photosensor is most sensitive to green, but I can't figure out is why the sensor outputs a different voltage with the same light intensity input.

Any help is greatly appreciated, thanks
 
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Kipster1203 said:
From the spec sheet I know that the photosensor is most sensitive to green, but I can't figure out is why the sensor outputs a different voltage with the same light intensity input.
That makes no sense that's what sensitivity means. Less sensitive means lower output for the same intensity input.
 

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