Saturday, October 11, 2014

title change & stuff

Well, its been a long time.  i did a proof of concept on the platform with a cheap rc car and a parallax basic stamp.  No pictures because then i quit it for other options. 

I purchased an old International Scout 2 and am working on getting it cleaned up.  changed the differential oil on it today. 

also realizing why i stopped blogging.

Thursday, September 11, 2008

sensors



I have chosen the front sensor to be an ultrasonic sensor for the time being. The initial thought is that ultrasonic will not have as many false positives as an IR outside during the day. See attached for the simple test and results of the sensor. This can detect a pencil at 2 feet during my testing.



Wednesday, September 10, 2008

back at it

So I finally got around to taking a picture of the 2 H-bridges used to power the algorithmic test bed motors. They are just simple H-Bridges powered by two 9 Volt DC batteries until I get a better battery for the whole shebang. You can find a schematic for it here.
See below for some pictures....









Also, below is a movie I made of the tank chassis rolling down a hill (driveway) to test if the friction of the axles needs to be modified.




video

Sunday, June 8, 2008

Thursday, May 29, 2008

chassis design


my initial design was to use a tank chassis from an idea I got looking at RC tank combat websites. These guys build 1/6th scale RC tanks of military tanks which made it to production and then shoot paintballs through the turrents at each other's tank. Neat idea I think.


See the picture for the chassis with wheels, belts and the motors in place.

Tuesday, May 27, 2008

robotic platform

Now for the platform I've chosen the BS2 chip from Parallax since it is a good starter chip and language and was recommended by a book which is right up my alley (123 Robotics Experiments Evil Genius)

If you get this book, I highly recommend buying the parts from
Hobby Engineering as they have the majority of the experiments covered in bundle packs.

Having said all that, I am most of the way through the book and only have a few experiments left. I have begun to work on some of the more advanced stuff, like GPS integration and H-bridge motor controllers (also from Parallax).

starting up

this is about my epic journey to build a robotic lawnmower. I am starting with a several phased plan as I have limited time and resources to devote to the project. Initially the project aims to do the following:

  1. Run self contained (no starting and/or stopping it)
  2. Mow my back yard
  3. Include object avoidance
  4. Have a safety trigger for a dead stop
  5. Scale to run in the front yard.