I tested more wtb, this time with the switch mode protocol. Here are the results:

Recent wtb test

There often seems to be a strong preference for a side. The laser was off.

Flies often seem to have a strong preferenc for a side. In the imiage below the top fly was punished for left torque and survived, the fly below was punished for the right torque side and died.

Trails with drift

I’ve started again to test the set-up after repairs. It does not seem to be perfectly stable ,with some drift in the positive direction. Most often, it seems that the amount of drifting would be fine for measuring.

Therefor I tried measuring some flies. A problem now is a very negative baseline, when the fly stops flying. Also the response for left and right seems not to be equal.

So now I’m trying to get the line close to 0, so that I have conclusive results if the set-up if usable at the current state.

2 examples of drift:

What magnitude of drift is still ok?

The signal is drifting again. Also adding a spacer between clamp and device is not solving it, but making the signal more noisy.