I used my graphing calculator as an intervalometer to record a timelapse of our installation in Minneapolis this Summer at Northern Spark. The calculator sent a pulse to my camera over a 2.5mm audio cable. The BASIC code for a TI-83+ is below:
This post is mostly to test out the oEmbed functionality in wordpress, which is pretty neat. You do need to write the url in the HTML editor in order to avoid the automatic <p> tags breaking the embed. Even viewing it in the visual mode breaks them.