Photosensor Issue: Troubleshooting Strange Voltage Output with Green LED

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SUMMARY

The forum discussion centers on troubleshooting voltage output discrepancies in photosensors when exposed to different LED colors. Specifically, the users observed that shining a blue LED caused the voltage output to drop over time, while a green LED resulted in a rising voltage output. The photosensor in question is confirmed to be most sensitive to green light, leading to confusion regarding the varying voltage outputs under identical light intensity conditions. The sensitivity of the photosensor directly correlates with its voltage output, explaining the observed phenomena.

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Kipster1203
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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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