GP2Y1014AUOF dust sensor giving strange readings

[jaydenlord]

Has anyone worked with the GP2Y1014AUOF PM2.5 dust sensor? I wired it up to an Arduino, but the voltage output seems off — it's giving values that don't really change much even if there's visible smoke or dust. Do I need to pulse the LED pin a certain way, or can it just stay powered all the time?

 

[ohmsweetohm761]

To get good readings, make sure you only pulse the LED. If you leave it on all the time, the readings will be incorrect. A 10ms pulse every 100ms should work. This timing fits the sensor's specs and should give you reliable voltage change data when the dust level changes.

 

[mich4el.crx]

Has anyone worked with the GP2Y1014AUOF PM2.5 dust sensor? I wired it up to an Arduino, but the voltage output seems off — it's giving values that don't really change much even if there's visible smoke or dust. Do I need to pulse the LED pin a certain way, or can it just stay powered all the time?

I agree with @ohmsweetohm761 except the pulse duration needs to be shorter. The datasheet specifies a 0.32ms pulse with the reading taken 0.28ms after the pulse starts. Stick to the datasheet timing for accurate results.