Sharp GP2D120 ir sensor range

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alasdair
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Post by alasdair »

Thanks andy.

I have found that the range of the infrared emiter i have is approx. 5 meters! A bit long! I need something like 4cm!
slurp
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Post by slurp »

I found this quite some time ago (it's helpful to Minisumo too):-

http://www.micromouseonline.com/files/m ... arratt.pdf

It's one approch to IR wall detction.

Best regards,
colin
alasdair
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Post by alasdair »

slurp wrote:I found this quite some time ago (it's helpful to Minisumo too):-

http://www.micromouseonline.com/files/m ... arratt.pdf

It's one approch to IR wall detction.

Best regards,
colin
Cheers Colin. That was an interesting approach which i may look into with another mouse, but i think that this one will be simple, as i already have boards.

This question is aimed at peter: Where do you get those boards which you use as edge sensors on your sumo? If i can find the specs then i may use them as wall sensors on my mouse.

The new mouse is going to be called:
Hellbound 2- To hell and back again. :evil:
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peterwaller
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Post by peterwaller »

When you say board if you mean the PCB I etch them myself the component I use is
http://www.maplin.co.uk/Module.aspx?ModuleNo=12709
alasdair
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Post by alasdair »

peterwaller wrote:When you say board if you mean the PCB I etch them myself the component I use is
http://www.maplin.co.uk/Module.aspx?ModuleNo=12709
For some reason the maplin site is down. :cry:
alasdair
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Post by alasdair »

I think i could maybe use an opto isolator to do this- It would work would it not?
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peterwaller
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Post by peterwaller »

No with an opto isolator the sender / receiver are completely internal no light goes in or out of the device. It is just a way of separating two circuit entirely while still passing a signal between them.
alasdair
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Post by alasdair »

Oh, i have just looked up what they are and you are correct, they are not what i am looking for.

I have just gone onto the Photo-reflector that you posted peter, as the maplin site has only just come back online. Do you know the range? (i have no experience in opto electrnics so i will need some help!) :D
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peterwaller
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Post by peterwaller »

The Maplin devices I was using was just to detect the edge white ring at about 5 mm. (very short range)
alasdair
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Post by alasdair »

Thats good. What voltage and Ampage can i put into them before they blow?
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