Electrode Headset about headset HOT 9 OPEN

Hey! Thanks for reaching out.

Have you found our wiki yet? : https://github.com/mindaffect/Headset/wiki. More General information can be found on https://github.com/mindaffect/General/wiki.

There is an unboxing video of one of the older versions, that can be found here: https://youtu.be/xnnxJFk4oYQ . It shows a short clip on how to set it up. The key is to roll up the sponges such that they fit in the electrodes.

In general, the headset is quite robust to slight displacement. We normally place the middle electrode (the third one from the left/logo) just above the inion (the little bump on the back of your head). To minimize the impedance, you can press the electrodes onto the head until the subject feels the water. To make sure it is reaching the head, you can always add a little water from above or below the electrodes between the sponge and the head when the headset is on. Normally, this will be enough and signals will be good. Depending on where you live, the water might be more/less conducting. You can also try using lens liquid, which is a good conducting solution.

There is a signal viewer available in the Python repository. A general test is if you can detect alpha waves by closing your eyes, and then seeing (quickly after opening your eyes) if the waves are bigger and at a lower frequency.

Please let me know if you have any more questions

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I have now also added a quick instruction guide on setting up the electrodes in the repository.

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Hey Emma,

It should all be possible without connecting the decoder to anything (except the power). It should work by just connecting to the decoder wifi (Mindaffecttest) and navigating to https://10.0.0.5. You do not need internet for this (as the decoder sets up its own local network). Through this website, you should be able to connect it to actual wifi. Could you try this again on different browsers and maybe a different device? (This should not matter, but if we know it is a problem, we can fix it)

Please let me know if you can not get it to work, we will then find another fix.

Best,

Danielle

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Hi Emma,

As Danielle is moving to a new company, I'll be taking over support for users.

From the sound of it, it seems that the sd-card on your rPI may be corrupt. We tested the image before shipping (of-course) but it is a known issue with sd-cards and rPIs that sometimes they get (partially) corrupted. If this is the case then you have a couple of options:

1. download a new sd-card image for the rPI and write it to the sd-card. I can send you the link if you would like to try this, though you would need a sd-card writer to make it work. Alternatively, we can mail you a new sd-card with the image-pre-written.
2. Connect a screen/keyboard to the rPi and try to manually fix the image. If you just want to get the decoder working, that can be done relatively easily, by adding the ganglion MAC address to one file. If fixing the full sd-image then it can be complicated if you don't have linux command line experience. If you want to try this way, we can try to setup a support call/chat (on gitter) to help you with it.

Sorry, that you are having these issues, we will do our best to solve them for you!

Jason

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