All 8 channels railing on headset

trainlevel2trainlevel2
edited September 2016 in Cyton
Hello,
I'm using an OpenBCI 8-channel headset, and I'm experiencing noise on all channels. No power is flowing to the laptops on the table (they're all on battery), and all the pins are secured on. The only peculiar thing is that when shorting each channel to ground, one appears to be on by default. Could this be a software (error-checking) bug? Any additional advice (besides what's listed on the main troubleshooting website?)



image

Thanks,
Eric

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Eric, hi.

    Can you try a test with the gold cups as shown on the tutorial,

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

    Try swapping around your electrode leads, you may have a bad reference (SRB2) connection (wire or connector).

    Another test you can try is to use a glob of Ten20 paste or alligator clips, to connect together all of your channels, plus SRB2, plus Bias. This should result in about 0 microvolts on all channels.

    William
  • trainlevel2trainlevel2
    Hello William,
    The tutorial and linking all the gold cups together with the paste (I used a Glycerin solution, since I don't have the paste) yielded the same results. I also tried switching the SRB2 around but saw no change as well, and since that didn't work for any connector, I can only conclude it's a problem with the connector or the OpenBCI itself.
    Do you know of any other test methods?
    Thank you,
    Eric
  • wjcroftwjcroft Mount Shasta, CA
    The paste contains conductive saline solution and is adhesive. Do you have alligator clips? Or do you have any jumpers that use the same female header connector? If you short one or more channels to the SRB2 pin (and Bias), this should produce 0 uV. Are you sure you are using the pins closest to the board?

Sign In or Register to comment.

© Vanilla Keystone Theme 2026