davide_93
davide_93
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A thing that I noticed today during my experiments is the following: leaving the electrode with the screw inserted and secured by the bolts didn't cause any "corrosion" up until the electrode is used for the first time for recording EEG (so, until c…
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Hi William, thanks for your reply. Yes, for the first Mark III I used the McMaster-Carr screws that are suggested in the tutorial (I was in the US back then). For the second Mark III, I used another type of screws (I cannot buy from McMaster-C…
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Hi all, I'm experiencing a weird problem with the dry electrodes of my Mark III headset (which I built by myself). The problem is the following one: some hours after inserting the dry electrodes in the electrode holders following the procedure d…
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Hi @lagidigu, I would like to buy springs from Europe (Italy to be precise) as well. Did you try the ones sold on eBay? Are they good? May I ask you if you also found a website for nuts and bolts? Thanks! Davide
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Yes, that could be another idea to exploit for Android communication. I think that I'll go with the Cyton and OTG approach, and if everything works then I'll try to use the WiFi shield (is it possible to buy it or you are still on beta testing?). …
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William, thanks again. At the moment, I don't have any OpenBCI Board: I studied one year in Chicago and there I had the OpenBCI Cyton, while now that I'm back in Italy I need to choose which board to buy. That's why I'm trying to understand which …
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Hi William, thanks for your reply. I saw that thread, as well as this one about the use of OpenBCI Cyton with an OTG for Android. In the research lab where I'm doing my thesis they already developed an Android app that interfaces with Emotiv …
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I tried the following: * after rebooting, with the Dongle inserteed, ls -la /dev grep OpenBCI doesn't print anything. ls -la /dev grep usbserial prints the following: crw-rw-rw- 1 root wheel 18, 5 11 Mar 14:07 cu.usbserial-DJ00IL36 crw-rw-rw- 1…
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It reflects my edits, but the problem is still present. I was thinking that maybe, after rebooting, the backup file is loaded instead of the one that I edited.
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[Update] What I noticed is that, after rebooting, the "Info.plist" file is still ok, while the backup version "Info.plist~" doesn't reflect that changes. drwxrwxr-x 6 root wheel 204 11 Mar 12:53 . drwxrwxrwx 3 root wheel 102 8 Ago …
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Hi, you may find some useful information here: http://eeghacker.blogspot.com/2015/01/estimating-openbci-battery-life.html. Hope it helps!
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Thanks, I opened an issue.
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Oh, now everything is clear! I thought that the "spikey units" were 3D printed too! I'm sorry. I'll send an email asking if it's possible to purchase only them and I'll post here.
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No, I'm referring to these: https://github.com/OpenBCI/Docs/blob/master/assets/MarkIV/Photos/SpikeyUnits8chan.JPG .
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@wjcrof, I took a look at the files uploaded on github, but I think that there is no .stl file to 3D print the spikey units. So, I assume that it is possible to have them by only purchasing the headset from the store.
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Thanks for the link, I didn't find the files on the Learning - Headware section and I thought that they were not present on github. Thanks also for the suggestion, if I won't be able to print the Mark IV headset I'll ask in the Opportunities secti…
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Thank you @wjcroft for your reply. That is the same thing that I thought: electrode holders and octonuts are probably different. My problem is that I cannot print on flexible filaments, so I won't be able to add the SuperNova extensions on my Mark…
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I tried to fix my code, but it is still impossible for me to see the auxValue changing: it has always the same value even though I know that it is changing (and with the OpenBCI GUI I can see it changing in the .txt file). This is the code that I…
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Hi @pushtheworld, thank you very much for your help! With the new version of the OpenBCI GUI I was able to correctly read the data of my analog sensor. I'm writing my custom software with Processing to read the data from the OpenBCI: right …
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Thank you @pushtheworld for your reply. With the default board firmware I could read only the channels data, I tried to read the analog sensor by disabling the useAccel and writing board.auxData[0] = analogRead(A7) but it didn't work. What I not…
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Hi, I uploaded the firmware on all the three microcontrollers. When I use the "defaultBoard" firmware, everything is working fine and I can read and visualize all the data in the correct way, both with OpenBCI_GUI and with the software that I w…
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Thanks @pushtheworld, I'll try to update the firmware on all the uC and see if it works!
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@wjcroft Thank you for your reply! Yes, I've read the external trigger tutorial, but as you say it's a digital pin and not analog pin. It seems to me that the value stored in OpenBCI.auxData the first time the loop is executed then doesn't ch…
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Ok, I think that I have understood the problem: it should be the function readBytes() of Processing, that doesn't work with just one byte. Instead, by using read(), I see the correct values.
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Thank you cfausn for your reply! I know that looking for 0xA0 may be a problem, since it can be included in anyone of the 33 byte of the packet, and I'll later implement a control like the one you described to me. What I don't understand is that,…