This is a sample program can trigger a cammera from your computer using Triggertrap kit. This was inspired by Aaron Harris's script he wrote for photographing the International Space Station.
This has been tested on Mac and Linux. On Linux this uses aplay from
the alsa-utils package.
play the sound, Install go and
ttrap$ go build
ttrap$ ./ttrap --at "2015-07-29 23:13:12 PDT"
2015/07/29 23:12:55 wait for it...
2015/07/29 23:13:12 click
2015/07/29 23:13:22 done
The tone file is derived from one on this post from TriggerTrap.