Last Updated on January 20, 2022 by pg@petergamma.org
https://openbci.com/forum/index.php?p=/discussion/174/24-32-channel
wjcroft Mount Shasta, CA
April 2020
«No OpenBCI products are capable of 32 or 64 channels, even with “external trigger” idea. The master clock must be aligned exactly for all ADS1299 chips. Such an expandable product IS on our TODO list.»
William Croft, OpenBCI
17.11.22
8 channel OpenBCI modules can be bought from Aliexpress for around 200 USD:
https://www.aliexpress.com/item/4001095052608.html?spm=a2g0o.cart.0.0.7d0b3c007b1b4Q&mp=1
boards can be synchronized by an external trigger, sensor data can be streamed into the Influx Database. Hardware costs for such a setup are low, but the software needs to be developed first, a job for a computer scientist or a computer engineer with good programming skills.
But I think this is an option which as many advantages. Low hardware costs, individual modules can be replaced if they are damaged, there are many software examples available for OpenBCI modules. Software and hardware for OpenBCI has been tested over several years by many users.
19.1.22
William Croft from OpenBCI commented to the topic Influx Database and OpenBCI:
“The ‘external trigger’ approach will STILL not work. ALL CHANNELS need to sample at exactly the same moment in time. Otherwise many metrics such as phase, coherence, P300 sample averaging, etc., are meaningless.”
larger number of channels ? — OpenBCI Forum
20.1.22
Are the metrics, phase, coherence, P300 sample averaging necessary for all applications?
20.1.22
Can these parameters not be calculated in a different way?