Our senior design team has decided to work on a wrist perturbation device (more details soon…) but as of now, I am trying to learn more about motors and eccentric loads. A gaming console controller is obviously a wonderful piece of technology to loot supplies from!
So, I was able to exchange a partially working controller for a spicy chicken Chic-fil-A sandwich (food is a wonderful currency in college!) This is what it looks like inside:
The flexible PCB is very cool, but my eyes are on the motors (and the joysticks!)
Here’s the power draw if we fix a 1.5 V source to drive these. Of course, a battery won’t do as good a job as a wall-powered supply, but we are just characterizing the best operating conditions, right?
Interestingly, the PlayStation 3 controllers use two, different loads, with a heavier one on the right side. An ME friend of mine thinks that allows they might have intended to use only one motor at a time, so they can have two vibrational modes without having to design a complex system to change the mass or radius on mRω^2.
We’ll probably have to think through how many different types of vibrational stimuli we would need in our design project (again, details soon!)
Besides, the same ME friend (Roozbeh!) showed me the innards of a classic joystick that he discovered somewhere in the music building. This is one of the neatest jobs I have seen, and the power / ground planes are so cool!
There are a couple of ICs on the other side. We looked up their datasheets, and thanks to alldatasheet.com, here they are for future reading! I am attaching these because one of the them is the first “obsolete” datasheet I have ever seen:
Besides, Roozbeh showed me other cool things he had found: