Originally posted on March 6, 2019. In this post we look at how to use the MilliKey DeLux light sensor upgrade to test visual stimulus onset timing using PsychoPy Coder by checking for a keyboard event. The MilliKey DeLux is an affordable and easy to use light sensor attachment for MilliKey response boxes. The MilliKey DeLux can generate light… Continue reading Test Visual Stimulus Onset Timing using Keyboard Events !?