Daisy Channels 9-16 data low uV, ch 1-8 ok

octobotoctobot
edited October 2016 in Cyton
Hi, i'm running with the Daisy 16 channel and seeing a very clear difference in power between channels 1-8 and 9-16 in the Processing GUI.

Not sure if it's an artifact produced by the Processing sketch, or by the hardware, or something, else?  I'm pretty sure it's not from the first 8 electrodes being placed differently, since electrodes from base board and Daisy are randomly distributed.

FYI, I do have a Y-connector connecting the 2 SRB pins (and just one regular jumper wire on the BIAS on the base board only).

Anybody here have any guess what might be going on here?
Thank you




Comments

  • wjcroftwjcroft Mount Shasta, CA
    Have you double checked your Y cable with a DVM to ensure you have a zero ohms continuity on all 3 leads? You should be using SRB2 (closest to board) on both pins.

    William

  • octobotoctobot
    Thanks! I had it on the top pin! Works nice and even now!! Thank you for your excellent work on the daisy connection wjcroft. Someday soon I hope to follow your lead in getting the USB connection and higher frequency as per your github project. This alternating 8 channel packet thing has been tricky to work with
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