Klein Bot

Kleins, robots, electricity

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Robot Rally Mission Aborted

Posted by Klein on November 2, 2012 at 8:35 PM Comments comments (0)

Octowobble is *not* going to Atlanta tomorrow. I couldn't get anyone (including Ben) to come with me, and I was looking at two all nighters to get ready. In addition, we're visiting family on Sunday, and I wasn't looking forward to even more driving this weekend.

I'll keep working on the robot over the next year, and next fall, hopefully, it won't be such a mad rush to get ready. (yeah right).

Until next year -- sleep tight, Octowobble.

Registered

Posted by Klein on October 28, 2012 at 9:00 AM Comments comments (0)

Octowobble is (finally) registered for the Robot Rally. At this point it looks like only 5 others are registered.


Form Name: Robot Rally Registration

Date of Submission: Sun, 28 Oct 2012 07:01:35 -0600

URL : http://kleinbot.webs.com

Site Name : Kleinbot

Robot's Name : Octowobble

Contest: Polyathlon: Simple Line Follower,Advanced Line Follower,Beacon Killer,Beacon Killer with Obstacles,Dead Reckoning,Bulldozer

Processor Type : Arduino Mega / AVR

Navigation: IR Bumpers,Beacon

Other Nav Systems: Polarized light beacon, IR line sensor

Robot Info: This is my third year entering Octowobble. First year, I placed 2nd; last year, I placed dead last (and only because I put the robot on the course). This year I'm aiming for somewhere between the extremes.


Battery testing

Posted by Klein on October 22, 2012 at 10:35 PM Comments comments (0)

(6 Oct 2012)

After my AA NiMH batteries overheated in my home-made charger, I thought to test them. I had 13 good batteries out of my pack of 16.

The test rig is shown in the photos. The rig is a spring for the load (~1.2 ohm), a travel clock (PowerPuff girls!) for the timer, and a voltmeter to monitor progress. This puts about an amp load on the battery (the spring gets hot). The clock stops at about 0.8 volt, and I stood by to remove the battery after the clock stopped. Good batteries ran about 2 hours, spot-on for their rating of 2000 mA-hr. Bad batteries drained in 5 to 15 minutes.