hiro
hiro
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Comments
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Hi William, Thank you for your reply. OK. I deleted a part of thread about this point because someone will be confused. (Do not need to do it?) The averaging you mention is only applied WITHIN the same channel. It does not average across chan…
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Hi William, Thank you for your reply. I may solved this issue. I tested again with two electrodes, Fp1 and Fp2. I changed active electrodes from default ones. I activated Daisy module. I mediated to avoid causing spike. Other settings were the same…
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Hi Julien, Thank you for your reply. I understand.
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Hi Julian, Thank you for reply. Your suggestion help me so much. Regarding bias, you can totally include the bias in your settings That's good. Is it a recording coming from the SD card at Gain X8 ? Yes. The secon…
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A DVM digital voltmeter resistance check may show issues between the female header connector and the ear electrode. I have checked these. I doubted my ear clips are disconnected but these are fine as a result of testing by multimeter. …
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One remark I would have is that your images all show cross-contamination across all channels. In other words, all channels show same wave patterns. This is usually an issue with the reference electrode, since it is shared across all channels. …
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Ultracortex with ThinkPulse, need BIAS? small amplitude Hello all, I used Ultracortex with ThinkPulse. I followed the instruction is this page. https://docs.openbci.com/ThirdParty/ThinkPulse/ThinkPulse/ I turned off BIAS and decrease the PGA …
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Hi all, I forgot if I save data to microSD, amplitude would decrease. I said the similar issue in the past thread. https://openbci.com/forum/index.php?p=/discussion/comment/19540#Comment_19540 I did a simple experience again to get data with P…
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Hi Shirley, I believe the CytonDaisy sample rate is 125 Hz, regardless if you are saving the data to GUI folder or to microSD card. Thank you for your response and I am sorry for late response. I see. Yet, I think sampling rate was 250…
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Hi all, I did a few of experiences and I found that the same issue cause using another SD or CytonDaisy board but Gelfree did not cause the issue. First, I exchanged a faster SD card for slower one and did experience the same as the first thread…
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Hi William, Thank you for your help. I see. I will try to use my cheaper SD card, it's normal quality. I still am doubting you can get reliable faster sample rate recording to SD. If your expectation is right, it is enough to record …
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So please confirm. You are saying that there are NO amplitude differences (streaming vs SD card), when using the default sampling rate of 250 Hz. The weaker amplitude SD card signals only show up when selecting faster sample rates. Is that correct? …
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So please confirm. You are saying that there are NO amplitude differences (streaming vs SD card), when using the default sampling rate of 250 Hz. The weaker amplitude SD card signals only show up when selecting faster sample rates. Is that correct? …
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So please confirm. You are saying that there are NO amplitude differences (streaming vs SD card), when using the default sampling rate of 250 Hz. The weaker amplitude SD card signals only show up when selecting faster sample rates. Is that correct? …
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wjcroft, Thank you for your comment. The PGA gain was x8. I modified settings based on "ThinkPulse Getting Started Guide" but I included BIAS because amplitude of waves was poor when I removed BIAS. I also checked this thread. https://openbci.com…