Triggertrap

Triggertrap was an England-based[1] company that created hardware and software products centred on triggering single-lens reflex (SLR) cameras.

[1] Triggertrap Mobile utilized the sensors and processing power of a smartphone or tablet running IOS to trigger cameras based on sound, motion, vibration, or location, in addition to timelapse, bulb ramping, and other features.

[6][7] The Triggertrap v1 is a programmable trigger based on Arduino open-source architecture, and the source-code for the product is downloadable from GitHub.

In addition, it has an auxiliary port, which enables Triggertrap v1 to trigger a camera based on anything that generates an electric signal.

The Triggertrap v1 is classed as a high-speed device, able to use the ambient light sensor to respond and fire the external flash such that it would correctly sync at shutter speeds down to 1/640th of a second- that's a response time of less than 1.6 milliseconds.