Sharp GP2D120 ir sensor range

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peterwaller
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Postby peterwaller » Thu Sep 30, 2010 6:18 pm

I see you answered while I was editing it so just incase you missed it I will post it again.
Just looked on RS and they have the senders
http://uk.rs-online.com/web/search/sear ... rm=sfh4580
But only have the SFH3500 receivers which do not have the built in daylight filter.
http://uk.rs-online.com/web/search/sear ... rm=sfh3500

alasdair
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Postby alasdair » Thu Sep 30, 2010 6:25 pm

Is a daylight filter completely necessary? If so, how would i apply one?

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peterwaller
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Postby peterwaller » Thu Sep 30, 2010 6:44 pm

Difficult to say I had the option and never tried the non filtered one.
The output of the two receivers are AC coupled (C21 & C22) so any constant light tends to be filtered out but it would still be possible with too much ambient light to saturate the receivers and stop them working. I found putting them in a tube cut down the amount of ambient light getting in anyway.

alasdair
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Postby alasdair » Thu Sep 30, 2010 6:46 pm

That was what i was thinking. Simple black heatshrink would work probably.


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