Connect the red or green wire to the ground wires
connecting the red with the green wire
Quote from: ERR99 on 28 / December / 2009, 10:10:34I tried the simple phototransistor->soundcard cable.Before you try the more complicated circuit tell me the colour of each wire and which part of the jack-plug it connects to.Is there a voltage between ring and shield when it is plugged into the sound card ?
I tried the simple phototransistor->soundcard cable.
i am grounded now and have to wait until my photodiode order arrives
Umpf. Just found that the Lenovo T61 uses a "Monaural Microphone Jack"
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