I am programming EEG experiments using Psychopy and the Brain Products EEG system. As an interface to send event triggers from my experiment to the EEG system, I am using the parallel port (DB25 connector).
I have seen several posts across the new and the old psychopy forum about using a Labjack U3 device instead of the parallel port and I am interested in this solution for two reasons:
- Modern computers often ship without parallel ports and I want to replace that technology while still being able to interface with my current EEG equipment. The timing properties of the parallel port should be preserved or improved.
- Existing solutions to replace the parallel port via a serial connection that emulates a parallel port usually only have drivers for Windows or at most OSX … but I would prefer to use Linux
What prevents me from ordering a Labjack U3 is that I am at a loss how I would connect it to a parallel port cable with db25 connectors. According to the data sheet, the Labjack only has a DB15 connector. How do the psychopy users of the Labjack U3 solve this? Do I HAVE to get my hands dirty, open a DB25 cable and connect the single cable ends to the single IO pins?
From the forums I know that at least @jon has used this successfully and also tested the timing - so I’d be grateful for a short reply.