Using a phototransistor for wall detection. | General | Forum

Using a phototransistor for wall detection.

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8:38 am
February 4, 2010

Andrew

Cyborg

posts 6

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Can somebody explain if it is possible to use a phototransistor and an IR led in parallel to form a very very simple wall detection robot? If anyone has had experience doing this and could explain how to use it in a simple circuit I would appreciate it.

Thanks!

11:50 am
February 4, 2010

David

Admin

posts 137

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Post edited 11:50 am – February 4, 2010 by David

Yes you can, here is a schematic

http://www.reconnsworld.com/ir…..temit.html

The important thing is that IR led emits the same frequency as the phototransitor can detect.

Alot of the time you can buy them in pairs

http://www.sparkfun.com/commer…..cts_id=241

This is a very good article on proximity sensing using IR (slightly more advanced but better)

http://www.schursastrophotogra…..logic.html

Hope this helps,

David

9:39 pm
February 20, 2010

Andrew

Cyborg

posts 6

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http://www.maplin.co.uk/Module…..leNo=10379

Do you know if the schematic you gave me could work with these? I went into maplins and got two pairs of them, dunno exactly how to use them and dont want to waste good components finding out.

I need circuit software also, if anyone has a program for designing circuits they could recommend to me.

12:24 am
February 21, 2010

Lukasz

Dublin

Cyborg

posts 57

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Andrew,

The Schematice could work with there IR RX and IR TX…

I think the best circuit software will be Eagle http://www.cadsoft.de/ … is free of charge for no commercial using …

Lukasz

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