Week 8 Update

This has been a great week in terms of progress for the group. We tested the electrodes in lab on the oscilloscope and the readings were perfectly sinusoidal. It was one of the only amplifiers in the class that actually worked exceptionally well. Although we found out that we made a mistake when building the amplifier circuit. We didn't realize that when the product description said that the amplifier integrated circuit contained two amplifiers it meant it could handle four electrodes while we are only using two. What this means is that we built twice as much as we actually needed. In reality this isn't completely bad since we would have had another way to test the electrodes if one side didn't work. We also started testing the electrodes using the mask, which worked surprisingly well without any of the modifications made yet. The mask helped to keep the electrodes in place even when there were alligator clips connected to them. As the week progresses we will be testing the accelerometer and electrodes together.

This video shows what the electrode signal looks like when connected to the oscilloscope. This test was conducted with one electrode next to each eye.

This is what it looks like when the electrodes are connected. We later found out that we only need one alligator clip on each side instead of two.