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TomboT www.tombot.net
Beam robotics @ liverpool university
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Pat
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 Posted: Sat Apr 08, 2006 6:15 pm Post subject: IR mini sumo optical |
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hello tom
just two questions for shematic mini sumo optical edge sensor
the valeur resistor is 90 and 60 ohm ??
when reference for IR composants , emetting and recepting...
thank tom
Patrick ( french-beamer )
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TomboT !
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| Posted: Wed Apr 12, 2006 6:21 pm Post subject: |
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Sorry Pat, I was away for a few days....
The values of 90 and 60 ohms were derived for the paired IR devices from Maplin:
http://www.maplin.co.uk/module.as...0&ModuleNo=10379&doy=12m4
Looking at the datasheet it says the maximum IF (forward current) value, so I tried to get it close to this.
I will upload a newer IR circuit soon... I have been using a better version from the Solarbotics Sumovore. If you download the PDF for their sumo, you can use a 74hc240 for line detection. |
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