https://www.crowdsupply.com/neuroidss/freeeeg32#details-top https://www.pcbway.com/blog/Activities/32_channel_EEG_ADC_with_Cortex_M7_____FreeEEG32.html added 11.9.21 Free EEG32 32 EEG Channels for $199 FreeEEG32 OpenBCI Cyton KT88-3200 Mitsar 202 Microcontroller STM32H743 PIC32MX250F128B – – Channels 32 8 32 32 Resolution (bits) 24 24 12 24 Max Programmable Gain Amplification (PGA) 8x 24x Unknown Unknown Open Source Yes Yes No No Price (in USD) $199 $500 $1000 $10,500