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Feb25-12, 01:50 PM
P: 147
Quote Quote by yungman View Post
You are picking up noise on the long input wires. Look into what Skeptic2 suggested.
The most annoying part is a ~2-4Hz regular-looking oscillation, with up to +-0.5V of amplitude at output. That one happens on a breadboard as well, with no extra wires.
It's not in the light or surroundings - happens from many lightsources and in many places, don't happen in none.
The "no detectable noise" part was about full darkness and near the upper limit.

Have i missed something again?