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Hobbyweight Examples

12 robots have a lot of appeal to them.  They are big enough to have a nice satisfying bang when you fight them, but they are small enough that they are easy to manage and are relatively inexpensive

Basic Hobbyweight Example

Cost

Item

$40.00 Motors + Wheels
$75.00 Batteries
$75.00 Radio Receiver
$300.00 Speed controllers
$100.00 Misc...
$60.00 Chassis + Materials
*$650.00 Grand Total

* I actually spent nearly $0.00 on this robot.  I had nearly everything from other projects, and Rob Purdy gave me the motor - wheel setup.  Like many robotic projects, once you have a collection of parts the real cost is your time. 

Last Minute Monkey Robot
Last Minute Monkey is a very simple 12 robot.  It did OK in it's one and only competition.  The .04" titanium wedge in the front didn't work that well.  The hinges bound and the wedge bent a little.  Also the 7.2v motors didn't take too well to running at 12v and one of them seized up putting it out of the competition.  Overall I think it's record was 2 and 2.
 
Advanced Hobbyweight Robot
The basic components of this robot aren't really all that different from the example above.  The big difference is the addition of an active weapon.  The cost of this robot isn't really much different than the one above, the big difference is in the amount of time and planning that go into building it.
Cost

Item

$40.00 Motors + Wheels
$75.00 Batteries
$75.00 Radio Receiver
$300.00 Speed controllers
$100.00 Misc...
$60.00 Chassis + Materials
$50.00 Small Linear actuator
*$700.00 Grand Total

*Rob Purdy built this robot so I'm not really sure how much it cost.  I believe he used the same motor setup as Last Minute Monkey.

Scratch Robot
This version of "Scratch" has a very powerful clamp driven by a linear actuator that I've used in much larger 60 pound robots.  This robot was built by Rob Purdy.
 
Advanced Hobbyweight Robot
 
Cost

Item

$40.00 Motors + Wheels
$75.00 Batteries
$75.00 Radio Receiver
$450.00 Speed controllers
$100.00 Misc...
$60.00 Chassis + Materials
$50.00 Small Linear actuator
*$850.00 Grand Total

Myq of the Palmer Secondary School in  Richmond, BC literally has a fleet of 12 pound robots.  Mike tends to make most of his own parts so he can keep the costs down.

Mustang Robot
Mustang was one Myq's of his first attempts at a robot with an active weapon.  The mini-EV driven drum weapon was very effective.