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Author Topic: SFH9241  (Read 951 times)
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ugur
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« on: April 14, 2010, 07:07:14 19:07 »

Hi,
How can i use SFH9241. I tried it but it is not worked properly.
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titi
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« Reply #1 on: April 14, 2010, 07:46:52 19:46 »

Hi,

Here is the datasheet.

This component works like an Optocoupler but act like Reflective Sensors (you need to fed the LED under 20ma, and when something is front the sensor, The IR return to the opto and is transistor conduct).
So you need bias the internal transitor.
See page 5 of the data-sheet, remark resistors need to be adapts in data sheet R is very small and RL too.

Adapt R for 20mA in LED, and test with 4.7k or 10k or more for RL.

Best Regards.
« Last Edit: April 14, 2010, 07:49:58 19:49 by titi » Logged
ugur
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« Reply #2 on: April 15, 2010, 10:59:23 10:59 »

Thanks.
it is working. i tried R = 68ohm, RL=10K.
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