Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
Can Phototransistor distinguish between colors?
How much easer would it be if I only monitored the red LED and the sun was always behind or it was night?- afink
- Post #5
- Forum: Circuit design
-
Can Phototransistor distinguish between colors?
Can a circuit be designed using a Photodiode or Phototransistor to distinguish between the 3 different LED light sources (day and night) from a stoplight at a distance of 30 ft? The output would drive a relay for each color. I need to know when each color light turns on and off. This would be...- afink
- Thread
- Replies: 9
- Forum: Circuit design
