USB Andon with Relay Controller

A case that holds a generic 4-channel USB Relay board inside and allows for the mounting of an inexpensive Andon/Stack light.to a wall or other surface. There are pass-throughs in the lid and box for the Andon wires to connect to the relay board.

There are many, many generic brands of these 4-channel relay boards - look for one with blue 'Songle' relays (or no-name blue relays), as these all seem to be a consistent size. [Here's an example from Aliexpress](https://bit.ly/3nO6qkW).

Similarly, there are many manufacturers of cheap Andons. This design is made for the cheapiest kind with a square plastic base, a small allen bolt for adjusting the tilt of the unit, and between 1 and 5 lights. [Here's an example, also from Aliexpress](https://bit.ly/3q0jCp4).

You'll need a power supply to power both the relay board and the Andon, each of which comes in either a 12v or 24v variety. You'll have an easier time with the wiring if you match the voltage of the relay board to the voltage o