having the “can you believe somebody threw this away?” mentality has gotten us into some difficulty with the years, however look what [Joshua] discovered at the scrap yard! It’s a door from a power conversion station as well as it consists of fourteen sign lights as well as a great deal of other doodads. however considering that this is just the door, he needed a method to screen the controls as well as drive the indicators. At the heart of the hack he utilized to get this up as well as running is a photo 18F2550. It has no difficulty driving the signs thanks to a pair of ULN2803 darlington arrays which switch the higher 24 volt levels.
His writeup doesn’t mention the technique used, however the panel likewise has a couple of meters at the top. In the video after the break you can clearly see that he’s got them both working. We’d bet there’s a plan for every of the buttons as well, considering that this will be prominently featured in their alien-invasion themed Halloween screen this year.