I have digitized single channel eeg signal from online database, I want to use the eeg signal to check my eeg acquisition circuit. i.e. I want to design a eeg simulator circuit that would create an analog output of the prerecorded signals fed to them. Could you suggest some papers or circuits that would be helpful.
Thanks in advance to all the members of the research community
Your notebook/table/phone and this:
https://www.amazon.it/Apple-Adattatore-USB-C-Jack-Cuffie/dp/B07K2NH6ZN
and, in case, a voltage divider at the output to adapt the voltage level.
S.
Kiruthika,
This is not a trivial problem.
You've got a CSV file of numbers, and want to somehow transpose them to electrical signals a few microV in amplitude.
Your computer probably lacks a DAC port - those happy days are long gone.
However, it probably has a 3,.5mm audio jack - where you would normally plug in headphones.
First you need to route the CSV data to the audio jack, in some way, using the values to represent simple amplitude.
One way to do that is with Matlab:
https://www.mathworks.com/matlabcentral/answers/1669669-how-to-convert-an-excel-file-csv-to-a-wav-format-any-other-audio-format-file?s_tid=prof_contriblnk
Once you have it 'playable' (you could generate a test signal of a simple sine wave and play it to see if it works) you will need a voltage divider (made from two resistors) and a 3.5mm plug.
The 'Large' resistor might be a few 1k ohms, the small one might be a few ohms. The ratio of the two will dictate the size of the signal sent to the EEG input.
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