FCCH member Mike Michaud recently created a detailed write-up of his foam rocket launching device.
It’s all managed by an Arduino, has configurable pressure levels, LED lighting effects during the pressurization process, and of course a big red button to launch the rocket. All of this is contained in a custom-built housing, along with self-created graphics to spruce up the front panel.
For more details, including a couple of videos of the device in action, visit his write-up.