I didn't say visible light. It may be IR but it's still light.

I tried this once with some RadioShack 'IR' phototransistors that seemed
to mostly sense visible light. It actually worked OK but it got confused
by the sun and so on very easily.

Steve Blackmore wrote:
>>The ones like the FMA Co-Pilot are even simpler. For each axis there
>>are two sensors pointed in opposite directions. It just looks to see
>>which is picking up more light; if they are the same it's level.
>
>
> No - IR not visible light.
> --
> Steve Blackmore
>
> --
> http://www.piclist.com hint: PICList Posts must start with ONE topic:
> [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads
>

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads