if you don't know what resistor values work, and you have a breadboard circuit setup for the trigger wires, consider putting a 'pot' type variable volume control type resistor on one or both sides of

Can you clarify? What do you mean by "stim artifact"? What is the source of the stimulation? Something your equipment is generating, then feeding to the Cyton? Generally external trigger sou

I am facing this issue with Digital IO pins for Trigger Insertion with Cyton Board.

Sometimes this is done with "external trigger". When the timing has to be very tight and exact, for example P300. But usually the timing constraints are not that exacting. And synchrony with

I was able to successfully follow the instructions / calibrate within the terminal, but still having some trouble getting the muscle flexes to trigger the jump in the game in browser -- will look into

If you are seeing the trigger level show up and looks valid with the GUI widget and 'analog read mode', then why not employ your own threshold detection test, for example, x.x volts = ON, y.y volts =

The system includes a blink detector to send commands to control another piece of software (and trigger some cool LEDs on the hat), plus an Alpha wave detector that triggered a haptic feedback motor i

The common way to record synchronized EEG with external device trigger sources, is to use the External Trigger capability of Cyton. Be sure to use an opto-isolator as illustrated to separate the volta

The common way to record synchronized EEG with external device trigger sources, is to use the External Trigger capability of Cyton. Be sure to use an opto-isolator as illustrated to separate the volta

The previous link I gave for external trigger on Cyton, however, will precisely correlate with the EEG being sampled at that time. Since the 3 Aux channels are sampled at the same moment in time as th

If you need precise alignment, as with P300 / ERP, using an external trigger is commonly used.

I am working to add an external trigger to my cyton board following this guide and connecting a button (created using this tutorial) connecting to the digital IO pins. I can get the button to work (an

My goal is to build a EEG machine that triggers when brain activity hits a certain level for a certain length of time. I'm hoping not to get any useful data out of it or have a large number of sensors

You COULD run an experiment and determine typical latencies. Since this is an audio stimulus, I assume you run an audio cable from the 1.5mm audio jack to your subject headphones, or an external speak

You could use either Ganglion or Cyton for P300 work. Depending on how many channels you want, if you need to work with external triggers, etc. Cyton has 8 channels, plus three additional 'Aux' channe

Mikhael, hi. The 2015 quote from Joel Murphy is very old. Sorry for any confusion. No OpenBCI products are capable of 32 or 64 channels, even with "external trigger" idea. The master clock m

Since it is only one channel, you could use another channel, to record some type of 'external trigger' level that corresponds to when your auditory stimulus is presented. For example if you were using

Many P300 experiments are done using the oddball paradigm. In those cases there are 'output' actions that correspond to either a control or oddball stimulus. So an external trigger based on an externa

Many other threads mention the inaccuracy of the GUI csv text file timestamps. These are not generated at the Ganglion, but instead when the packets arrive in the GUI or Hub, and hence have considerab

I've also read this post regarding syncing with timestamps. It sounds like they ended up using some form of external trigger. If I can, I'd like to avoid this. As I have mentioned, both the task and B