using Cyton, with Headband Kit, but with no gold cups

ysxysx China
edited April 2019 in Cyton
This will be the first time that I use OpenBCI products to collect EEG signals. I hope to be able to design innovatively through OpenBCI products. I bought the following items. I want to know if I can complete a simple EEG acquisition platform through these items. Is there any redundancy or inadequacy?
   • 3 x Header Pin to Touch Proof Electrode Adapter
   • 1 x Dry EEG Comb Electrodes (Pack of 30)
   • 1 x OpenBCI EEG Headband Kit
   • 2 x Cyton Biosensing Board (8-channels)

Comments

  • wjcroftwjcroft Mount Shasta, CA
    edited April 2019
    Ysx, hi.

    Have you tried following the steps in the tutorial?


    Your item list does not include the gold cups and paste shown in the tutorial, so please adapt instead with your headband kit. Use the kit earclips on ears. You can use 2 flat electrodes on the arms, be sure to use some type of tape (perhaps wrapped around the arm) to hold them on tightly. The other flat electrode will be on your forehead at Fp2 (see photo). Held in place by the velcro band. And for the O1 electrode (rear of scalp, see photo) -- use a comb and one of the clip on electrode wires. Fasten the headband so it is firmly in place, Possibly also wiggle the O1 electrode or brush the hair out of the way so it makes contact with the scalp.

    I'm not sure why you purchased 3 of the touchproof adapters. One is enough for 8 channels plus reference and ground. The headband kit also comes with enough combs to start, so you won't be needing that many of the pack of 30 extras you have. But they are handy as replacements.

    (In the future, you might want to experiment with gold cups as well. You could probably find a set there very inexpensively in China. Gold cups are used with conductive paste, such as Ten20, shown in the tutorial.)

    Regards,

    William

  • wjcroftwjcroft Mount Shasta, CA
    If you want to reach other 10-20 sites located on the scalp, you can make additional velcro straps with this material. Same as is used with the kit,


    All you need to do is use a hole punch to place holes where you need them, and cut to a length that can bridge between points on the headband. Your headband needs to be tight enough act as an anchor for the strap(s) looping over the top. Optionally you can even create a chip strap that pulls the headband down, but that generally is not needed.

  • wjcroftwjcroft Mount Shasta, CA
    OK, re-reading your list. The headband kit comes with dry combs, 2mm tip length. The package of 30 you ordered are the 5mm tip combs. So you may find different applications for these. For example the longer combs with longer hair. The 5mm combs are also less sharp pointed than the 2mm combs, so more comfortable.
  • ysxysx China
    Thanks a lot for your answer!
    My project requires me to use dry electrodes, so the gold cups and paste are out of my consideration.
    I wonder if there is a headband suitable for Dry EEG Comb Electrodes?
    I rethink that one touchproof adapters is enough,thank you.
  • ysxysx China
    One more question, is the dry electrode in the market now universal?
  • wjcroftwjcroft Mount Shasta, CA
    re: "I wonder if there is a headband suitable for Dry EEG Comb Electrodes?"

    The headband you already have does that. The holes in the band accommodate either the flat or comb electrodes. The velcro band material simply has holes where these push through. The connector fastens onto the outside.

    re: gold cups.

    It's always advisable to have different electrode types available for comparison. You may find better readings with the gold cups in certain circumstances. The 'dry' electrodes can also be used with a bit of conductive gel, which also improves conductivity. Depending on what you are measuring (for example P300). you may find differences in what different electrode configurations are capable of.

    re: dry electrodes 'universal'

    There are many types of dry electrodes. See the search button in the right column,


    Regards,

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