Hello,
I'm trying to build a circuit that can differentiate between light and dark tiles. I was thinking of using an LED/Light sensor combination. I want to be able to detect from far away (10cm) and also as close as (.5cm). It can be a different sensor for each distance.
I found this photodiode, http://ca.mouser.com/ProductDetail/Avago-Technologies/APDS-9301-020/?qs=t8w9rvwJwK8OBnnCABHlZw==, and would couple it with a 640 nm light source (blue).
The idea would be to shine the light and detect the amount relfected from the surface. Ideally, the amount refelcted off the light surface would be measurably higher than the dark surface.
Before I move forward, does this seem to be a viable solution? Alternatively, does anyone know of any other components / methods that were successful in similar applications?
Thanks
I'm trying to build a circuit that can differentiate between light and dark tiles. I was thinking of using an LED/Light sensor combination. I want to be able to detect from far away (10cm) and also as close as (.5cm). It can be a different sensor for each distance.
I found this photodiode, http://ca.mouser.com/ProductDetail/Avago-Technologies/APDS-9301-020/?qs=t8w9rvwJwK8OBnnCABHlZw==, and would couple it with a 640 nm light source (blue).
The idea would be to shine the light and detect the amount relfected from the surface. Ideally, the amount refelcted off the light surface would be measurably higher than the dark surface.
Before I move forward, does this seem to be a viable solution? Alternatively, does anyone know of any other components / methods that were successful in similar applications?
Thanks