Archive for the 'Projects' Category

PHUN simulation: Rocker-Bogie Design for CE Bot

Presently, I am working on a project by Crazyengineers.com. CE Bot (visit the link for more information and see Appendix for more links). While discussing the appropriate suspension/chassis design, we thought about implementing a Rocker-Bogie system inspired by the Mars Rover designs.

http://mars.tv/images/rover.jpg

So to get an idea on how the Rocker-Bogie design would work, I tried several simulations on PHUN, a 2-D simulation sandbox. Interesting program to go a lot of other things, its free.

Note that the simulations are only for one side. The other side is connected by a differential rod with elliptical gearing on each side. This has to be further studied to be used properly. However, here is a small flash demo showing how each side will turn based on the other’s motion [[LINK]]:

Buttons top to bottom are (if you cannot read the text): Kuper, Planetary, Sun. We will be using Planetary in our design to connect the two sides.

Here is the video containing the 3 simulations with explaination:

If you have more Questions visit:

CE Bot Google Site

CE Bot Part 1

CE Bot Part 2

CE Bot Part 3

or Email me at: varun(att)crazyengineers(d0t)com

PROJECT: Development of a Glove based joystick.

Hello after a very long time. There is no particular reason I am late, but mostly laziness… usual.

Anyway, the project idea I had posted earlier is finished. Its a college project so bear with the technicality. Its a joystick in a glove form, has no base to keep it on a table, and you wear it, its a glove. Its official title is: “Design and Development of a Glove Based Joystick Input Device”. Actually, this version I made can only control 2 servo motors and is not for a PC. Future designs will be able to connect to your USB.

Here are a few images:

The Device:

The joysticks are a single pair of Analog controllers salvaged from the Playstation2. The microcontroller is Basic Stamp 2 from Parallax. This is the first version of a glove based device. The goal was to make this a Joystick that can be connected to a computer, however this model does not, its just a demo of the hardware and connects to 2 servomotors to show the flexibility of the joystick and the ADC. The remaining details can be found in the project report.

Future Ideas:

1. I can either take a commercial USB joystick and strip it, connect the inputs to my device and have a fully functional glove based joystick.

2. The more difficult method is to program a PIC32 with USB capabilities. USB- HID (Human Interface Device) protocol can be used.

Here is a ppt describing the protect:
For a full report and construction details email me: varun@crazyengineers.com

New Project on the way…

I am on a new project these days. This one is under my final year. Its a

Glove Based Joystick Input Device (Wired and Wireless)

1. Progress? Well, I have salvaged 3 pairs of potentiometers from old Playstation 2 controllers.

2. Tested them with RC time technique to get Analog value into the Microcontroller.

3. Yesterday tested with ADC0832 2channe, 8-bit Analog to Digital Converter.

I had problems with the RC discharge time technique, Google the details if interested. too long and damn boring. Now the most important this is connecting it to a PC. I have thought of two methods. One, buying a ready module with USB-HID Protocol. Second, try to implement it myself in Basic Stamp2 (Which is pretty difficult).

I think the first method is my first choice and here is the module I am talking about.

://www.lbodnar.dsl.pipex.com/joystick/

http://forums.frugalsworld.com/vbb/showthread.php?t=98831

Any updates will be posted soon.

Actually there might be a possibility of using Buetooth HID Protocol too :)