/triggerino

WIP repo for an Arduino based mock triggers input to use for developing fMRI stimulation code

Primary LanguageMATLABMIT LicenseMIT

triggerino

Arduino based mock trigger device to use for developing fMRI stimulation code (in case you need to sync your stimulation with the MRI triggers).

Basic use: while the button is pressed, it will flash the led and send a letter (e.g., a 't') every x msec (e.g., 1800 msec) to the connected computer.

Code

In triggerino.ino set the trigger key and the TR according to your need (see example below)

// set trigger key
char triggerKey = 't';

// set TR in msec
int TR = 1800;

Circuit

Elements you need:

  • Arduino Leonardo (compared to the classic Arduino UNO, computers and Matlab see it as an external keyboard)

  • micro USB cable

  • breadboard

  • 6 jumpers

  • 1 basic led

  • 1 basic button

  • 2 resistors (220 Ω and 10 kΩ)

How to use it

sandbox_getTrigger.m is a PsychtoolbBox based script that waits for the Arduino input (a keyboard stroke) to do something.