So I started working at the Miami Children’s Museum again on the exhibits team and boy, did they have some puzzles waiting for me to solve when I got there!
One broken rotating billboard sign (I have no clue who made it, and this is a good thing, because I’d otherwise yell at them)
One SparkFun Redboard
One Pololu motor driver
One 24vdc power supply from Marlin P. Jones
One ginormous Leeson 1/4 horsepower right angle gearhead motor
\m/ OVER A DOZEN BLOOD SACRIFICES \m/
(and that’s just where I lost count)
This is the guts of one of those three panel rotating signs, like you see on billboards. Note the dead variable freq drive controller at top.
This sign was designed with absolutely no consideration for maintenance once installed. It’s totally ridiculous. The triangular aluminum rods that the sign panels are snapped into lift out (I discovered this after fighting with setscrews on their bottoms for most of a day thinking that’s how they came out!) revealing… a ginormous nigh impossible to access Bodine AC 3 phase 208v motor being driven off a Delta VFD… Uggghhh!!! The VFD was toast, its programming was unknown, it all had to go!