EEG to tDCS

[SJK]

Hey all,
this is my first post and i'm seeking aid on a project of mine,
any thoughts / comments would be greatly appreciated!

I'm looking to connect an EEG device to a tDCS for purpose of brainwave stimulation,
In theory when the EEG outputs a reading of a specific Hz category (depending on the brain state), it would then trigger the tDCS to emit a specific Hz for short period of time.

This EEG schematic is the one I am confident in building, although I have only had experience in circuitry at a school based level :-

The questions I really wanted to ask are:-
What materials would be needed to
a) connect the EEG to the tDCS in such a way that when the EEG gave a specific reading it would trigger the tDCS to work its magic for, say half a minute, 30s.

&

The specific circuitry required for such an operation,

Schematic for tDCS:-

Any thoughts/feedback greatly appreciated!
Thank you

Also may I add, i'm looking to bypass any computer connections, such as EEG software etcetera. Having it localized to a single automated device

 

[KMoffett]

It helps to explain acronyms. tDCS=https://www.npr.org/blogs/health/20...-brain-with-electricity-dont-try-this-at-home

Ken