I tried the simple phototransistor->soundcard cable.
The mouse uses infrared light (>780nm) led, an so the photodiode in my mouse is only sensitive to infrared light.
So, bottom line is: Use only photodiodes which are sensitive to "visible" light, like the SFH 300 (420...1130nm) , because the G11 LEDs does not emit light in the infrared spectrum. So i am grounded now and have to wait until my photodiode order arrives... damned!
Does something "more recommendable" than the BPW 96 C phototransistor exist for building?
test circuit and 'scope software by pointing TV remote at the phototransistor.
which circuit to build?The one you discribed in Reply #78,
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