Last Updated on September 15, 2024 by pg@petergamma.org
https://openbci.com/forum/index.php?p=/discussion/3750/using-two-cyton-daisy-boards-with-one-b
- I would like to two pair of cyton+daisy boards with one brain, connected to one computer. Has anyone done this before, and if so, did you use BrainFlow for the signals? What is the best way to get+process (in terms of hardware and software) all the signals from both pairs?
- When you use any of the boards (Cyton, or Cyton+Daisy, or even Ganglion), ALL of the channels are sampled at the exactly same moment in time.Separate boards cannot have this level of synchronization because the clock signals are not shared between separate boards.Daisy inherits clock from the Cyton it is attached to
Can we use OpenBCI and InfluxDB to get 32 channels?
- No, it is impossible, as I’ve said several times, with the current Cyton hardware. Investigate some other EEG amps that provide 19, 24 or 32 channels. ALL the channels must sample at the same moment in time.Otherwise many metrics such as phase, coherence, P300 sample averaging, etc., are meaningless.No. The ‘external trigger’ approach will STILL not work.
https://openbci.com/forum/index.php?p=/discussion/comment/17418#Comment_17418
External Trigger on OpenBCI Cyton Board
https://docs.openbci.com/Cyton/CytonExternal
“Sometimes, when studying EEG or other bio potential signals, you will want to have precise timing between external events or stimulus and the data stream. For example, if you are working with P300 waves it is necessary to know the exact time that the signal was presented to the subject in order to look for the tell-tale brain wave that happens about 300mS after the stimulus.”
The ADS1299-x provides two methods for device clocking:
- internal
- external
For applications that require higher accuracy, the ADS1299 can also accept an external clock signal.
So why not to clock the ADS1299 chips externally from a Raspberry Pi with a PiEEG hat, asks physiologist Peter Gamma from www.petergamma.org?
These are considerations of a physiologist who is not an expert in electronic components. And I invite electronics engineers to participate in this discussion.
Information for product sellers who do stock market speculation and scalping with products mentioned by Peter Gamma on www.petergamma.org
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According to the little experience of Peter Gamma from www.petergamma.org, many of the products listed here are still full of issues which need to be resolved. If you do stock market speculation and scalping with those, you will loose Peter Gamma from www.petergamma.org as a buyer of these products and as a reviewer. Is this not risky? Will you not loose a majority of your costumers as well?
And is it not so, that society in general does not accept stock market speculation and scalping with products as those which are listed here? And will you not be politically incapable of finding a majority of the voters if you do stock market speculation and scalping with these products?
And as a consequence will you not be condemned and punished by a political referendum soon? Especially if you do this to a Swiss, since are not majority of Swiss against stock market speculations and scalping with people on a budget? And people in Switzerland are known for a lot of political referendums, since we have direct democracy in this country.
And Peter Gamma from www.petergamma.org will fight up to the European Court of Human Rights against people who do stock market speculation and scalping with the products which are mentioned on www.petergamma.org. And if they do not have yet the legal basis there to do so, he will fight for it.
What is a scalping?
Scalping is a trading strategy in which an investor buys and sells a single asset multiple times throughout the day. The goal of a scalper is to make a small profit over a large number of small trades, rather than a huge profit on each individual trade.
What is a scalper?
A scalper is someone who buys something and resells it at a price far above the initial cost. For instance some says: “He got theater tickets through a scalper”: Someone who buys tickets to an event in order to resell them at a profit. And is it not also scalping if you take reviews from this site to make out of it a new product offer, and sell it for a higher price? We doubt that you will be successful with it. Since Peter Gamma will review your product and will user not come back to www.petergamma.org after that?
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