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Update 04-Electrode_Cap_Tutorial.md
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shirleyzhang867 authored Jul 28, 2023
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Expand Up @@ -8,10 +8,8 @@ The Electrode Cap allows up to 19 channels of EEG data to be obtained using wet
You can pair the the Electrode Cap with the OpenBCI [CytonDaisy 16-channel Biosensing Board,](https://shop.openbci.com/collections/frontpage/products/cyton-daisy-biosensing-boards-16-channel)
or a bioamplifier of your choice. Electrode gel must be used with the electrode cap.

The placement of these electrodes is as shown in the image below:
<img src="https://github.com/openbci-archive/Docs/blob/master/assets/images/electrode%20cap%20nodes_1.png?raw=true" width="50%" />

These electrodes map to labels on the electrodes. Please note that the cap uses older labelling, and that _T3, T4, T5, and T6_ were updated to be _T7, T8, P7, and P8_, respectively. These placements are interchangeable, and while the labels on the cap use older naming, they correspond to nodes on the diagram.
The placement of these electrodes is shown in the 10-20 diagram below:
<img src="https://github.com/OpenBCI/Documentation/blob/master/website/docs/assets/HeadwareImages/electrode_cap_diagram_1020.png?raw=true" width="50%" />

The Electrode Cap comes in two variants:

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