Tutorials

Tutorials

BrainAccess Standard Kit Setup


BrainAccess CAP has smaller and larger holes. Smaller holes should be used for electrode attachment to the cap and larger holes for the cables to pass from the inner part of the cap to the outer. The BrainAccess Standard Kit comes with 8 dry-contact electrodes with spring loaded spikes and 2 dry-contact electrodes with pads that are mounted at forehead positions. Follow the steps below for setting up the cap.

  1. Mount BrainAccess MINI electroencephalograph at the back of the cap using velcro tape.
  2. Place the electrode at the desired location and use the clip to attach the electrode to the cap.
  3. Connect one end of the provided ultra-mini coaxial cables to the socket on the electrode.
  4. Pass the other end of the cable through the nearest larger hole to the outer side of the cap and connect to the BrainAccess MINI.
  5. Repeat steps 2-4 until all the required electrodes are installed on the cap.

Note: The standard BrainAccess setup with electrode positions and corresponding input channels on the BrainAccess MINI are given below. Use cables of appropriate length when connecting electrodes to MINI.

Bias – Fp2
Reference – Fp1
0 – F3
1 – F4
2 – C3
3 – C4
4 – P3
5 – P4
6 – O1
7 – O2

Standard BrainAccess setup. Electrode positions and corresponding channels on BrainAccess MINI.

Once all the cables are connected, press the push button on the BrainAccess MINI and hold for a couple of seconds, the power LED should then be lit-up. If not, the battery might be empty – charge it first. Follow the steps below to establish bluetooth connection with BrainAccess MINI.

For Microsoft Windows users:

  1. Plug in the provided Bluetooth adapter to your computer, the drivers should install automatically. Skip this step if using an integrated or some other installed Bluetooth adapter.
  2. Find BrainAccess MINI on the list of available Bluetooth devices and connect to it.
  3. Go to “Bluetooth & other devices” settings, under the “Related settings” section click on “More Bluetooth options”. A new window will pop-up, select the “COM Ports” tab and look for a port with “outgoing” direction. Note down this COM port as you will need it when connecting to the BrainAccess MINI.

For linux users:

  1. Plug-in bluetooth adapter. Skip this step using an integrated bluetooth adapter. Connect to the device via bluetooth. If using Ubuntu/GNOME, this can be done through the GNOME Control Center, or using the bluetoothctl or bluez tools.
  2. Install the bluez-utils package (Ubuntu/Debian: sudo apt install bluez-utils)
  3. Enter the following command: sudo rfcomm bind <DEVICE> <MAC_ADDRESS>, where:

    <DEVICE> is the port you will enter into the application to connect to the device (/dev/<DEVICE>). By default, you should use rfcomm0

    <MAC_ADDRESS> is the bluetooth address of the device (example: B8:F0:09:AA:28:6A)

    Example command: sudo rfcomm bind rfcomm0 B8:F0:09:AA:28:6A (replace this address with your device address)

    This step has to be repeated every time the computer is restarted.

  4. Once finished, you can do sudo rfcomm unbind <DEVICE> to remove the port and free it for usage by another EEG device.

If you haven’t done this already, download and install BrainAccess software. The software can be downloaded from the download centre (link) which becomes available after the purchase of BrainAccess Standard Kit. After installation use BrainAccess Viewer (needs Python API package installation) or C/C++ or Python to stream EEG data and control MINI through the provided API.