laerciosilvajunior
laerciosilvajunior
About
- Username
- laerciosilvajunior
- Location
- Brazil
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- 61
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- Member
- Location
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Comments
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Thank you so much for your explanation. This is something that I didn't know. In this case I'll try your idea about voltage divider
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re: "can you clarify, you rotate through 4 different LiPo cells?" Yes, I have 4 different LiPo cells. re: "I outlined how the hookup would work. There is no built in hardware, you just need two resistors. Do you know what a voltage divider i…
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Thank you @wjcroft for your answer. I already have 4 batteries and I use this strategy of charging them when they are not in use. My idea is to check my supply energy in a widget at the same time I check EEG signals for example. In this ca…
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Does anybody have an answer about this issue? I have been trying to update the firmware since last Thursday but it's still not possible. Do I need to use a different version?
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I have the same problem and I have tried in two different OS: Win7 and Linux. This error appears in both cases. What is the problem?
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Hi @pushtheworld and @wjcroft. thank you for your answers. I have installed the newest version of the firmware and it worked! I still need to test the daisy module to verify the sample rate. As soon as possible I'll tell if it worked
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Hi @wjcroft I think the problem was related to the headset that I was using to performe the experiments. I have tried with the ultracortex IV and it worked just fine. I still need to find the problem with the other headset, but for now evertything…
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Hi @wjcroft Here follows the answers of your questions: Are your batteries fresh? Yes, they are. Does it also stop working at the 1 minute point? No, when I performed this test od connecting all leads it worked just fine, it did not stop after o…
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@wjcroft, thank you for your answer. When I started the test I saw signals on OpenBCI_GUI, but some of them were written RAILED instead of the uV. During 1 minutes it was possible to see some brain waves even with the word RAILED. After 1 minute th…
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Hi @f10-forever and @B2D. I had the same problems as you have now and I solved this using the following code in python: #2 x (fc/wc), fc = freq de corte desejada e wc = freq do sinal# bp_stop_Hz = np.array([59.0, 61.0]) #filtro rejeita faixa …
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Thank you! I have just seen that some lines are repeated, 2 lines in a row have the same values for the 8 first channels for examples. So I think that we have something like this: Its necessary to get to 8 first values of one line and the 8 last va…
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@wjcroft I have one doubt that is related to this old topic. I have permorfed an experiment with Daisy Module and I saved the timestamp for each line of data. I saw that the difference bewwen the lines is 4ms, the same difference when I do not use…
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William, Thank you again. I will read all the articles and answer you if it worked or not. Best regards, Laercio.
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Thank you William for your answer and to merge the topics, this is a better way to continue the topiic. Answerring your question about the conductivity, yes I have done the and the conductivity is something about 1.8 ohms for the electro-cap and 1.…
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[new thread titled: How to validate an EEG signal using headset] Hi everyone I bought the Ultracortex IV, but meanwhile I need to perform some experiments using a headcap. How can I know that the acquired signal is ok? I have been using a he…
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First of all thank you for your answer. My equiment: The board is the OpenBCI 32bit Board and there is the option to use it together with the Daisy Module, but I did not use, hence, the teste was made with 8 channels. My first test was performed…
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@wjcroft Once again, thank you a lot. Its working just fine, maybe 1ms of delay but the world is not perfect, hahaha The only doubt that I have now is related to HeadPlot.pde file that I tried to read but I did not understand what happens with the…
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@wjcroft First of all thank you for all your answers. Now I have Processing 2.2.1 installed in Win10 and Linux as you said. I have been asking a lot a question in the same topic that I opened, but the subject changed, is it OK? Now I have a diff…
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@wjcroft I tried to install the version 3.0.2 but it did not work. The same problems that I had before keep appearing. So I installed the version 2.2.1 with all folder that I have when I downloaded it in Oct, 2015 and its fine. So far my problem i…
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@wjcroft, I didn´t understand your question about source and precompiled binary. I have 3 different OS installed in 3 different machines and I will tell what is happening Linunx LTS 14.04 and processing 2.2.1 downloaded from https://processing.or…
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@wjcroft I have just performed the test that you asked me. The problem is the same. When I was recording all the values were zero (almost it, there was no variation in the signal) When I played the raw file what I saw was totally different…
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Maybe I have been done this in the wrong way. I used pins "Bias" and "SRB" as reference and plugged them on my ears, one pin in each ear using paste. The pins from N1P to N8P I plugged on the scalp through gold cup electrodes and paste. Al…
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@wjcroft Thank for you answer One last doubt, at least hope so, rs. When I use the OpenBCI_GUI to read my raw file the filters are turned on? If they are, why the signal that I see when I use "Playback (from file)" is not the same as the "Live (…
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Thank you for your answer @wjcroft. I will try to remove the DC offset from my data. > the values were different, all the values were in a crescent order Here I tried to say that the values had a range from -14000 to 35000, always increasing. …