How to make micro-usb or usb type c multichannel electrodes setup?
lunarbrain
India
in Electrodes
I have been looking for tutorial to make my own USB type-C or Micro-USB base 4 channel electrodes. I belive that USB type-C handle more channel than Micro-USB. What would be the connect/wiring layout for both types of connector.
I have been trying to modify gangalion 4 channel with micro-usb and usb-type-c for cyton borad. I have both of them and I am making an extention board for better contact between rather using dupont pin.
I have found these electrode setup which is coming from china but they dont deliver in my country hence I need to make them in house and replace them with gold cup elecrode or comb electrode.
Comments
Hi Lunar,
Not sure I'm understanding the motivation for this modification / adapter cable. The header pins on Cyton or Ganglion give full flexibility in how the channels are configured, either for EEG or EMG. The latter of which is frequently using both plus and minus pins.
However if you do make such an adapter cable, you can choose any wiring configuration you desire. Limited by the number of pins available on the connector.
Regards, William
Hi Wjcroft,
Thank you for the reply. I was confused if there a is special way to do the connection because there are power pins and data pins but as you have mentioned, I can use any pin for my electrode, ref and gnd that clarified most of the things.
Can you please also let me know if there is any standard in neurotech community to create those connection ports? Do I need to keep something in my mind before making my own USB base electrodes? I am asking because there are so many types of connections for EEG electrodes.
I think some models of Muse headband have a SINGLE electrode connection through a micro-usb.
https://openbci.com/forum/index.php?p=/discussion/2634/micro-usb-electrode-options-for-muse-extra-electrode-port
I have not heard of others using usb for EEG electrodes. With any setups based on usb, you need to caution the users to never plug into an actual usb port or port adapter, because the power pins (5V and ground) could contact either the skin or some other electronics not expecting it.
William
Hi wjcroft,
Thank you again for the reply. I already found that muse micro-usb modification and that's there where the confusion arises whether I can use multiple electrodes or not. But thank you for the clarification.