Hello, I've recently completed a go/nogo task with OpenBCI. However, OpenBCI is not showing clear ERP's as other devices. I've used lab streaming layer to collect both EEG and Presentation trigger str

Can it be used as a trigger?

I am attempting to set up a simple experiment using an external trigger from the program psychopy. What is the easiest way to do this? Is there is tutorial for pyff-lsl-psychopy external triggers some

I am attempting to set up an external trigger through my cyton board (from psychopy, if it matters). However, when switching on the digital read via the GUI, I am getting seemingly random numbers from

Another question is that if I want to set three  mark or trigger in the data stream, how can sove [email protected] you very much.

Can't you detect REM eye movements, even with the Ganglion limitations? Why would you need 'absolute' eye positioning? Isn't the movement alone enough to trigger your REM detector? Perhaps with some a

(2) you can use a "voltage divider" to reduce the signal to any desired level, even microvolts. Not sure about cross channel leakage. Could happen more likely if your EEG and trigger cables

Thanks for your feedback. I actually ran a test driving with the audio jack before seeing your reply. Using this method, I was able to capture a very strong audio signal while simultaneously capturing

2. @qwer1304 mentioned of using a WAV Trigger board (http://openbci.com/forum/index.php?p=/discussion/296/auditory-steady-state-response-with-openbci)

push of the PROG button, and the resulting trigger being placed in the

With a now functional upgrade of my Cyton firmware, I am able to insert triggers in the data with a push of the PROG button. Yay!

We're doing this to try and observe the delay of the trigger. We're thinking about creating a paradigm to try and extract information about motivation from the brain.

I'm trying to setup an external trigger for a P300 and have also been confused about how to do this. I think I understand what to do now based on both of your posts. Please let me know if I've underst

I am trying to do a P300 test so that I can try to figure out the exact delay of the trigger for my group's design project, but I'm unclear about the directions listed on the external triggering page

What is the source of your external trigger? If it is connected to other mains powered equipment, then the optoisolation is recommended for safety purposes. If you have some kind of battery powered tr

I still am not clear on the instructions for the external trigger. Do I absolutely need an optoisolater for this to work? The instructions aren't very clear.

If you don't have 3.x.x firmware, then please upgrade. That is the easiest way to get the external trigger.

a P300 test going and we've found the external trigger document from OpenBCI. I'm looking at the following link: http://docs.openbci.com/Tutorials/06-External_Trigger_Cyton_Example#external-trigger-o

AJ, what is the maximum delta (in microvolts) that can be accommodated without losing accuracy? Since @rivarda is using this as a trigger, he likely needs a square wave.

I would like to record some events triggered with an Arduino Leonardo.  Below is a Ganglion produced record of the reduced triggering signal.  The signal, high for one second and low for two seconds,