Noisy signal with my Ultracortex

Renaud

Hi !

First post here so if I've forgotten any information tell me

I'm currently using the 32 bit board kit (8 channels, http://shop.openbci.com/collections/frontpage/products/openbci-32-bit-board-kit?variant=784651699)

And I've 3d printed an Ultracortex Mark 3 nova.

I've been getting a lot of noise around the 0-5 HZ frequency (see image). This noise seems to be around the 

same for every electrodes.....

Is it possible that the electrodes are the problem ?

Do you have any idea what could cause the problem ?

wjcroft

Renaud, hi.

Can you try the tutorial steps using gold cups and paste?

http://docs.openbci.com/tutorials/01-GettingStarted

What are you using for SRB2 and Bias electrodes? The Ag-AgCl ear clips?

William

Renaud

Hi !

Thanks for your answer !

I don't have any paste though it seems the noise is still here  using only the gold cups

I am using the Ag-AgCl ear clips.

Thanks!

wjcroft

Two suggestions: (1) the gold cups need to be used with the conductive and adhesive paste (Ten20). Otherwise it does not work. Gold cups cannot be used 'dry', such as the Ag-AgCl combs you have.

(2) Sometimes mixing metals causes a 'battery' effect. For your gold cup test (following the tutorial doc pictures), use gold cups exclusively.