FreeEEG32-alpha131

4xADS131M08,
STM32H743ZI,
isolated USB, UART

Dmitry Sukhoruchkin

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Details

4xADS131M08,
STM32H743ZI,
isolated USB, UART, SPI,
sd-card.

32 channels version of https://hackaday.io/project/181521-freeeeg128-alpha

Files

FreeEEG32-alpha131.csv Comma-Separated Values - 4.51 kB - 10/19/2021 at 10:11		Download
gerber.zip Zip Archive - 239.23 kB - 09/13/2021 at 23:04		Download
assembly.zip application/zip - 126.43 kB - 09/13/2021 at 23:04		Download

Components

1 × ADS131M08IPBS
1 × STM32H743ZITx

Discussions

SantiagoPT2000 wrote 06/21/2023 at 14:33

Hello,

nice project, I am interested in making a 32-channel digitizer card with the ADS131M08, but before that I would like to know the maximum sampling rate you got on all channels in simultaneous reading and the format in which you pass the data from the card to the computer.

Are you sure? yes | no

francesco cenciarelli wrote 02/16/2023 at 00:26

Hi Dmitry,

Great Project! I was wondering why did you choose the Ads131 front end rather than the Ads1298 or Ads1299? Do you know how they compare in terms of performance? It seems that the ADS131M08 has no shortage problems and I am thinking of using it for a similar EEG project. Thank you in advance!

Are you sure? yes | no

Shield.Y wrote 01/03/2022 at 06:23

Hello, I see that FreeEEG uses two different AFEs, ads131 and ad7771. Do they perform the same or which is better？

Are you sure? yes | no

Dmitry Sukhoruchkin wrote 01/03/2022 at 15:54

ads131m08 has less dynamic range, but has built-in highpass filter to deal with it.

it also has reducing noise technology leads to division sample rate by 3.

Are you sure? yes | no

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FreeEEG32-alpha131

Details

Files