Blast gate servo controller for Arduino

See 3d printed parts at : https://www.thingiverse.com/thing:3301904

• Allows a single push button to switch between different blast gates, with only a single one open at a time.
• Currently open blast gate is indicated by an LED.
• Requires: A servo for each blast gate, one button
• Optional: An LED for each blast gate
• Optional: AC currents sensors from http://moderndevice.com/current
• Created 2019-01-02 - Greg Pringle
• Updated 2019-01-20 - Greg Pringle - Added AC sensor support