EEG and eye-tracking experiment

Hardware General
1

Hi! I am trying to set up an EEG-eye tracking experiment.
Our lab has a StimTracker model ST-100 (first generation I think?) which works fine with our EEG system (Compumedics NeuroScan - Synamps 2).
I want to extend my experiment to include eye-tracking data (EyeLink Portable Duo, host PC: Dell G15 5530).
Following this guide: Eye Tracking and EEG - Fast, Accurate, Reliable Eye Tracking I know I need a parallel port Y splitter cable to send the signal from the Stimulus PC to both EEG amplifier and eye-tracker host PC. However, our Stimulus PC is currently not directly connected to the EEG amplifier, but it passes through the StimTracker, which is connected to the amplifier through a parallel port cable and an adapter (?) like this: https://i.ebayimg.com/images/g/fsYAAOSwHgZk8llY/s-l960.webp .

So, here are my questions:

  1. do I have to connect the eye-tracking host PC directly to the Stimulus PC or, similarly to what we are doing with the EEG, make it pass through the StimTracker?
  2. In the latter case, since the adapter uses both the Parallel Port and the Extra Port, are you aware of any workaround?

Apologies for the long and technically super-specific question!

2

A splitter cable will also split the current that is available to send event markers. This may or may not matter – it all depends on how much current your EEG and eye tracker require.

I recommend a different approach. We can add a circuit board inside your StimTracker that will provide an auxiliary female connector that has 8 lines of output. You could then plug this cable into the auxiliary connector.

We still have two or three leftover boards in stock. If you would like to proceed with this option, please send us an email.