This repository contains Arduino code (arduino-barcodes) for generating TTL barcodes that can be used to synchronize various data sources.

First, the output pin of the Arduino must be connected to a digital input line of all devices with independent clocks. Once acquisition is finished, the unique 32-bit barcodes can be used to align the data offline, even if one of the data streams is interrupted during the experiment.

barcodes.py provides an example of how to extract the barcode values from an array of on/off events.