Last Updated on January 15, 2023 by pg@petergamma.org
comparison table for multi-sensor devices:
g.tec medical devices are very expensive. It is worth to build those ourselves.
Module 1 piece (USD )32 pieces (USD) 1 TGAM Brain Wave Sensor 19.6 627.2 2 16 Bit I2C ADS1115 4 channels 3.29 26.23 3 ESP32 1.35 16.12 total 669.47
Ask an engineer and read a good paper about the quality of these components.
Be careful, if you ask an engineer in the OpenBCI forum about it, who wants you to sell OpenBCI modules, ask an independent engineer as well.
Be careful, if you ask an engineer in the EEVBLOG, who want to sell you Texas Instruments chips, ask an independent engineer as well.
– Component list:
– TGAM EEG module:
https://www.aliexpress.com/item/1005004344005084.html?spm=a2g0o.productlist.main.3.540a157boTfB9r&algo_pvid=4ffd9d92-89f0-4b5c-ad3d-dc4c99a6ba44&algo_exp_id=4ffd9d92-89f0-4b5c-ad3d-dc4c99a6ba44-1&pdp_ext_f=%7B%22sku_id%22%3A%2212000028982844996%22%7D&pdp_npi=2%40dis%21USD%2130.16%2119.6%21%21%21%21%21%402102196716737499325344784d06c2%2112000028982844996%21sea&curPageLogUid=yMMYvdALULT3
– 16 Bit I2C ADS1115 Module ADC 4 Channel With Pro Gain Amplifier RPi Development Board:
https://www.aliexpress.com/item/1005001636468832.html?spm=a2g0o.productlist.main.1.1ef36491P2NrtU&algo_pvid=feccf54c-cbb8-4be0-a287-e9cd76fe72f7&aem_p4p_detail=202301141851566155107864523500006781367&algo_exp_id=feccf54c-cbb8-4be0-a287-e9cd76fe72f7-0&pdp_ext_f=%7B%22sku_id%22%3A%2212000016918174924%22%7D&pdp_npi=2%40dis%21USD%212.34%211.92%21%21%21%21%21%40212279b716737511167762377d06b7%2112000016918174924%21sea&curPageLogUid=k0o12XbUQFjr&ad_pvid=202301141851566155107864523500006781367_1&ad_pvid=202301141851566155107864523500006781367_1
– battery packs as in this example:
https://www.aliexpress.com/item/32842954547.html?spm=a2g0o.productlist.main.61.42ab57e1l2KcAp&algo_pvid=94dc46ce-6672-490a-8891-4464365ce16f&algo_exp_id=94dc46ce-6672-490a-8891-4464365ce16f-30&pdp_ext_f=%7B%22sku_id%22%3A%2265133262288%22%7D&pdp_npi=2%40dis%21USD%2157.5%2144.85%21%21%21%21%21%40212248ba16737517378385745d06a2%2165133262288%21sea&curPageLogUid=6nR7PlFAXHPQ
We made a similar comparison a view years ago in the OpenBCI forum. The costs for individual components tropped, but not those sold by William Croft from OpenBCI.
New OpenBCI modules are available at Aliexpress, but can t we let manufactuer themselves, and is it not the better?