wellton/Docs
1
0
Fork 0
Código Issues Pull Requests Ações Pacotes Projetos Versões Wiki Atividade
Arquivos
09e88e6febe70c9add7710ed6a7dde7fd7f1b06d
Docs/Headware/01-Ultracortex-Mark-IV.md
T
biomurph 09e88e6feb Major update 
Added Ganglion Data Format, Clarified GUI page. Fixed broken links
2017-01-30 17:18:08 -05:00

19 KiB
Arquivo Executável
Original Anotar Histórico

#Ultracortex Mark IV

Development Period: January to November 2016

image

####Complete Ultracortex Mark 4 kits are available for sale in the OpenBCI Online Store!

The Ultracortex is an open-source, 3D-printable headset intended to work with the OpenBCI system. It is capable of recording research-grade brain activity (EEG), muscle activity (EMG), and heart activity (ECG). The Ultracortex is under constant iteration. If you print/assemble your own Ultracortex, we would love to hear your feedback. Send us an email at contact@openbci.com or Tweet at us (@Ultracortex & @OpenBCI)!

Designers & Engineers:

THE COMPLETE ULTRACORTEX

Note: the part quantities listed below assume you are making an electrode holder for all 35 nodes of the Ultracortex Mark 4. In reality, you will likely have only 8 or 16 electrodes, depending on whether you are working with the OpenBCI Cyton Board (8 channels) or the OpenBCI 16-channel R&D Kit (16 channels). In general, more electrodes will distribute the downward scalp pressure, increasing comfort.

###3D-printed Parts:

###Non-printed Parts:

THE COMPLETE ULTRACORTEX (w/ PICTURES)

###3D-printed Parts:

####(1x) FRAME

  • FRAME (head circumference: small = 50-55cm, medium = 55-60cm, large = 60-65cm)

image

####(21x) MECH_PARTS

####(1x) BOARD_HOLDER

image

####(1x) BOARD_COVER

image

image

###Non-printed Parts:

###Non-printed Parts:

####Suggested screws for fastening BOARD_MOUNT & OpenBCI Board

image

image

image

image

image

image

####(1x) An OpenBCI Cyton Board (8 electrode channels) or an OpenBCI 16-channel R&D Kit (16 electrode channels)

image

####(1x) ~500mAh lithium ion rechargeable battery pack (Sparkfun or Adafruit) & (1x) A charger for your battery pack

image

SUGGESTED PRINT SETTINGS

  • FRAME_FRONT & FRAME_BACK
    • Material: PLA
    • Supports: YES
    • Raft: hopefully NO (but if supports aren't sticking, try the raft)
    • Infill: 20%
    • Layer Height: 0.2mm
    • Number of Shells: 3
    • Speed while extruding: 50-70% (slow it down if possible; these parts are detailed)
  • MECH_PARTS (INSERT )
    • Material: PLA
    • Supports: NO
    • Raft: NO
    • Infill: 20%
    • Layer Height: 0.2mm
    • Number of Shells: 3
    • Speed while extruding: 50-70% (slow it down if possible; these parts are detailed)
  • BOARD_MOUNT, BOARD_COVER
    • Material: PLA
    • Supports: NO
    • Raft: NO
    • Infill: 20%
    • Layer Height: 0.2mm
    • Number of Shells: 3
    • Speed while extruding: 50-70% (slow it down if possible; these parts are detailed)

RECOMMENDED ASSEMBLY TOOLS

  1. Loctite Super Glue w/ Cyanoacrylate
  2. coarse flat & circular files (for removing support artifacts)
  3. medium sand paper
  4. exacto blade
  5. philips head screw driver
  6. wire cutters
  7. needle-nose pliers
  8. snippers

image

ASSEMBLY INSTRUCTIONS

Remove residual support material & print flaws

Use sand paper, a file, and snippers to clean your FRAME and other 3D-printed parts. The most important part of this process is that you thoroughly clean out the frames nodes where you will place your INSERTS pieces.

image image

Glue the FRAME together

Carefully, glue the FRONT FRAME and BACK FRAME together with your Cyanoacrylate super glue. The best way to do this is to place both halves of the frame on a level surface and carefully bring them together. Be sure to be precise; it's VERY difficult to pull the pieces apart once you've put them together.

image

Mount the OpenBCI BOARD_MOUNT

Use two screws to mount the M4 Board_Mount to the Frame. Make sure that the orientation of the BOARD_HOLDER matches that of the pictures below:

image

Insert INSERTS pieces (x35) into frame

Note: Before glueing the INSERTS into the frame ensure, that it fits properly into the frame without glue.

image

For each INSERT, line the inner rim of frame with glue. Then insert the INSERT so that it is flush with the frame.

image

Your Ultracortex should now look like this with your 5 COMFORT UNITS screwed in place:

image

Embed OpenBCI into the Ultracortex

Connect your ~500 mAh lithium ion rechargeable batter to the back of your Cyton OpenBCI Board. Then fold the battery and its wires neatly behind the board before inserting the board into the BOARD_MOUNT. You can then secure the OpenBCI Board to the BOARD_MOUNT by clipping BOARD_COVER over top.

image

Identify electrode locations

Before creating your electrode mounts, it's a good idea to think about where you may want to place the electrodes on the Ultracortex FRAME. The placement of the electrode may affect how long you make the wire between the electrode and where the OpenBCI is mounted, at the back of the frame.

The Ultracortex node locations are based on the 10-20 system, which is the internationally accepted standard for electrode placement in the context of EEG.

The images below indicates the default 10-20 electrode locations that the OpenBCI Graphical User Interface expects. This application is great for viewing/recording your EEG and can be found in our OpenBCI_Processing repo. The blue nodes indicate the 8 default 10-20 locations (channels 1-8) of the Cyton Board. The red nodes indicate the default 10-20 locations of channels 9-16 when using the OpenBCI 16-channel R&D Kit.

For the remainder of this tutorial, the blue nodes on the 10-20 system diagram (channels 1-8 of the OpenBCI default settings) will be used. The channel to 10-20 system correlations are as follows:

  • Channel 1(N1P) - Fp1
  • Channel 2(N2P) - Fp2
  • Channel 3(N3P) - C3
  • Channel 4(N4P) - C4
  • Channel 5(N5P) - P7
  • Channel 6(N6P) - P8
  • Channel 7(N7P) - O1
  • Channel 8(N8P) - O2

image

placement of Nodes

First screw your two FLAT ELECTRODE UNITS in the front two nodes of the frame.

image

Then screw 6 SPIKEY ELECTRODE UNITS in the following nodes of the frame.

image

Connect wiring to OpenBCI

You will find 3 ribbon cables in your kit as seen below.

image

Peel off the GRAY and PURPLE from the 12" set and the BLUE, GREEN, ORANGE and YELLOW from the 8" set and the RED and BROWN from the 4" Set as seen below.

image

Than plug the male end in to the header cable on the NODES as seen below.

image

Run wires back to our OPENBCI Board and secure with wire clips. As mentioned above, if you're using the default OpenBCI electrode configuration, cut the wires so that they terminate at the following nodes:

  • Channel 1(N1P) - Fp1
  • Channel 2(N2P) - Fp2
  • Channel 3(N3P) - C3
  • Channel 4(N4P) - C4
  • Channel 5(N5P) - P7
  • Channel 6(N6P) - P8
  • Channel 7(N7P) - O1
  • Channel 8(N8P) - O2

image image

Your headset should look like this when your finished assembeling the 8 channels. 16 channel see instructions below on how to add nodes.

image image image

image

Connect ear clip electrodes (Reference & Ground)

Now that all of your electrode units are connected to your Ultracortex frame. Connect two ear clip electrodes to SRB2 and bottom BIAS pin (white and black respectively in the image below). These ear clip electrodes serve as the reference and bias (ground with common-mode noise rejection) for your EEG system.

16 Channel Add-Ons

Remove the two Comfort Nodes

From the front of the frame remove the following two Comfort Nodes.

image

Replace with Spikey Electrodes

image image

Add the next 6 Spikey Electrodes

In the following locations screw in the remaining 6 electrodes units. image

Wiring Electrodes

Take out your rest of your Ribben Cables and separatethe GRAY and PURPLE 8" & 4" cables and the BLUE, GREEN, ORANGE and YELLOW 8" and lastly the RED & BROWN 4" cables. image

Then plug the male end of the 8" GRAY and PURPLE to the 4" GRAY and PURPLE. image

Then wire your nodes in the same sequence as the first 8 as seen in the photo below. These wires get plugged them in to the OPENBCI DASY board. Remove and replace wire clips when needed to secure the 8 wires you just put in place. image image

Adjust the Ultracortex for your head

Put the Ultracortex Mark 4 onto your head and gradually tighten the electrode units until the electrodes are snuggly (but comfortably) against your scalp. If it is difficult to twist the ELECTRODE & COMFORT UNITS by hand

Be careful not to strain the electrode wires when twisting the electrode unit with the ELECTRODE UNITS, or you may separate the wire from the electrode itself.

Examine your brain waves!

Place your UltraCortex on your head so that the back center node is roughly the same distance above your inion (bump on the back of your skull) as the front center node is above the bridge of your nose. As you place the UltraCortex on your head, the springs should adjust to the shape and size of your head.

Now that you have your Ultracortex assembled and comfortably adjusted to your head size and shape, it's brain wave time!

image

Check out the Getting Started w/ OpenBCI tutorial to get up-and-running with the OpenBCI Processing GUI.

Below is a screenshot of what the GUI looks like when you've got your OpenBCI + Ultracortex (w/ 8 channels) hooked up! You can see a nice alpha (~11 hz) spike on the FFT Plot.

image

Give Us Feedback!

If you have questions, comments, or suggestions regarding the printing and/or assembly of the Ultracortex, we'd love to hear from you. Please submit issues to this repository or email us at contact@openbci.com. Or take some pictures of yourself wearing the Ultracortex and Tweet at us (@OpenBCI & @Ultracortex)!

Referência em uma Nova Issue Ver Git Blame Copiar Link Permanente