Hi,
What's the diffirence between a 2 or a 3 pin sensor?
Now I have IR sensor with 3 pins, and they work perfectly for receiving codes from remote controls. But now I tried to do an analogRead on them, and it doesn't give me a lot of diffirence when I near the sensor with an IRled.
Would I need a 2pin sesor for that like an Osram SFH 203 FA ?
thanks!
Bram
A 2-pin sensor is usually a photodiode or phototransistor. It conducts when it gets hit with any IR energy.
A 3-pin sensor usually has a digital output (on or off) and reacts to modulated IR only, typically 36 to 40 kHz modulation frequency as used by most IR remote controls.
If you want to receive IR remote signals, use the 3-pin models. If you want to measure IR intensity use the 2-pin models.
Ok, thank you very much for your help sir, it was really helpful!
I'll buy the 2-pins too, I'd like to be able to do it both 
Thanks!
Karma +1!