About this 3D model
Ultracortex Mark 3 Development Period: July 2015 — September 2015 Complete Ultracortex Mark 3 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: Aaron Trocola (aka Threeform) Conor Russomanno Joel Murphy (aka SafeForRobots) We want to give a big thank you to 3D SYSTEMS for their generous support in the Ultracortex Mark 3 development process! THE COMPLETE ULTRACORTEX Note: the part quantities listed below assume you are making an electrode holder for all 21 nodes of the Ultracortex Mark 3. In reality, you will likely have only 8 or 16 electrodes, depending on whether you are working with the OpenBCI 32bit Board(8 channels) or the OpenBCI 16-channel R&D Kit (16 channels). You may only want to create as many electrode units as you have channels, and then add more as necessary. In general, more electrodes will distribute the downward scalp pressure, increasing comfort. 3D-printed Parts: FRAME (head circumference: small = 50-55cm, medium = 55-60cm, large = 60-65cm) FRAME_FRONT (x1) — .STLs (small / medium / large) FRAME_BACK (x1) — .STLs (small / medium / large) MECH_PARTS OCTANUT (x21) — .STL download link OCTABOLT (x21) — .STL download link SPRING_CASING (x21) — .STL download link ELECTRODE_HOLDER (x21) — .STL download link BOARD_HOLDER (x1) — .STL download link BOARD_COVER (x1) — choose STANDARD or ADVANCED STANDARD — .STL download link ADVANCED (for extra hardware accessibility / if you've soldered on your header rows) — .STL download link Non-printed Parts: Additional Hardware: Suggested Spring 1 listed below (x21) Suggested Spring 2 listed below (x5) Suggested Nuts listed below (x42) Suggested Bolts listed below (x21) 1/4" #4 Drive Screw listed below (x8) for mounting the BOARD_HOLDER and OpenBCI Board Wiring (x21) We strip apart the Gold Cup Electrodes or from the Touch-Proof Connector cable that comes with an OpenBCI 32bit Board Kit. Dry electrodes by Florida Research Instruments (18x) Dry (spikey) electrodes to be installed in Ultracortex nodes with hair: Disposable / Reusable Dry EEG Electrode ($0.60 each at 50+ quantity purchase) (3x) Dry (non-spikey) electrodes to be installed in Ultracortex nodes without hair (forehead, for instance): Disposable / Reusable Cup Wet/Dry EEG Electrode ($10.00 for 15) (2x) Ear Clip electrode (for reference): TDI-430 Silver-Silver Chloride Ear Clip Electrode ($19.95 each) (1x) An OpenBCI 32bit Board or an OpenBCI 16-channel R&D Kit (1x) Lithium Ion Rechargeable Battery Pack (~500mAh) — Sparkfun or Adafruit (1x) A charger for your battery pack (~10x) Zip tie THE COMPLETE ULTRACORTEX (w/ PICTURES) 3D-printed Parts: (1x) FRAME FRAME (head circumference: small = 50-55cm, medium = 55-60cm, large = 60-65cm) FRAME_FRONT (x1) — .STLs (small / medium / large) FRAME_BACK (x1) — .STLs (small / medium / large) (21x) MECH_PARTS MECH_PARTS OCTANUT (x21) — .STL download link OCTABOLT (x21) — .STL download link SPRING_CASING (x21) — .STL download link ELECTRODE_HOLDER (x21) — .STL download link (1x) BOARD_HOLDER BOARD_HOLDER (x1) — .STL download link (1x) BOARD_COVER BOARD_COVER (x1) — choose STANDARD or ADVANCED STANDARD — .STL download link ADVANCED (for extra hardware accessibility / if you've soldered on your header rows) — .STL download link Non-printed Parts: Suggested springs: Suggested Spring 1 (x21) — aka "Weak Spring" — Century Spring Corp. Stock #: U-4 — this spring is not as strong as spring 2. We use it to mount the electrodes. The low "Rate" (1.3 lbs/in) makes it more forgiving and comfortable when holding the spikey electrode against your head. This process is described in more detail below (in the "Assembly Instructions" section). Suggested Spring 2 (x5) — aka "Strong Spring" — Century Spring Corp. Stock #: S-845 — this spring has a much stronger "Rate" (14 lb/in). This makes is ideal to act as a standoff at locations where you do not have a spikey electrode. This process is described in more detail below (in the "Assembly Instructions" section). Suggested nuts/bolts: We use small stainless steel screws and hex nuts to fasten the FRI electrodes (listed above) to the 3D-printed electrode mount components & wiring that connects the electrodes back to the OpenBCI board. We used stripped Gold Cup Electrodes as the cabling, by removing the gold cup with a wire cutter and looping the exposed wire around the screw between the two tightened hex nuts (as seen in the picture below). (21x) Stainless Steel Pan Head Phillips Machine Screw, 2-56 Thread, 3/8" Length ($5.70 per pack of 50) (42x) Stainless Steel Hex Nut, 2-56 Thread Size, 3/16" Wid