Hardware and software to capture discrete pixel intensity transitions from a small patch of an LCD screen. Transitions are reported as TTL pulses. This device is used to provide precise measurements of frame onset time in visual stimulus presentation

The bill of materials and other documentation is available at: https://sites.google.com/site/frame2ttl

Frame2TTL is a product of Sanworks LLC, licensed under GPL v3.0 (see included license) http://sanworks.io