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Hello all,
My latest pet project is EEG and I’ve done some researching on EEG hardware. In general, the main components are electroless (to obtain electrical signal from the skull / brain), instrumental amplifier (to amplify the signal), filter (to filtering noise and unwanted signal), ADC (to convert analog signal to digital), MCU (to transfer signal to computer for further analyzing or displaying).
Most of research papers mentioned using ADS1299 and then MCU to send data.
My question is do I need a standalone ADC (ie. ADS1299) or can I use the integrated ADC from MCU (ie. STM32F746G-Discovery)?
I believe STM32F746G has 3 x 12-bit ADC. 12-bit is 2^12 = 4096; it’s enough to capture brainwave frequency (ie. 80Hz x2 Nyquist = 160Hz equivalents to 2^8 = 256 => 8-bit).
The objective of this project is to build a lightweight hardware, with shoestring budget.
Hope you can shred some lights on pros / cons between ADCs from the perspective of EEG application.
Thank you in advance.
My latest pet project is EEG and I’ve done some researching on EEG hardware. In general, the main components are electroless (to obtain electrical signal from the skull / brain), instrumental amplifier (to amplify the signal), filter (to filtering noise and unwanted signal), ADC (to convert analog signal to digital), MCU (to transfer signal to computer for further analyzing or displaying).
Most of research papers mentioned using ADS1299 and then MCU to send data.
My question is do I need a standalone ADC (ie. ADS1299) or can I use the integrated ADC from MCU (ie. STM32F746G-Discovery)?
I believe STM32F746G has 3 x 12-bit ADC. 12-bit is 2^12 = 4096; it’s enough to capture brainwave frequency (ie. 80Hz x2 Nyquist = 160Hz equivalents to 2^8 = 256 => 8-bit).
The objective of this project is to build a lightweight hardware, with shoestring budget.
Hope you can shred some lights on pros / cons between ADCs from the perspective of EEG application.
Thank you in advance.
