The idea is to make an installation which can help you decide what to do during the weekend.
The First Pancake
The hole is a bit smaller and the switch is stuck in the hole.
The standoffs are longer than I expected. I have to buy shorter ones.
The holes for the screws are too big to hold it tightly.
And I also find a big problem that I forgot to design the place to put the battery. Oh gosh.
I have to make it again from the beginning.
The Second Try
This time I connected the battery to Arduino first to make sure that I had the right measure.
I also remember the lesson I learnt from the first demo that the size error of holes can be a big hidden trouble. So I made some samples by the laser cutter and measured the holes each time and made some modification.
I also decided to use hand drill instead of the laser cutter to drill holes for screws and standoffs, because it's a quicker and easy to make modification. At first I'm afraid of that the hand drill would break the acrylic but it worked good.
I used shorter standoffs to take place the former ones. The new ones are 1-3/4", and the former ones are 2-1/2".
And I also made the wires looks more tidy.