Let's Make Robots!

6WD

A long time ago (15 years to be precise) as an undergraduate I messed around in a robotics lab and even participated in a robotics competition in France. Te revive … Read more
Recently my company has been asked to demonstrate a robot that can perform an enviromentally friendly task. I only have about 1 month to complete the robot and I'm … Read more

Wild Thumper goes Wild hunting Lions in Africa!

I heard through the grapevine (amando96, Gareth) that a Wild Thumper Chassis was being used to photograph wild animals!

S.C.O.R.P.I.O.N. Potato cannon mounted on 6WD robot

Ok, to begin with it is just a normal SparkFun "new product post" but check out the last few minutes of the video. They mounted a potato cannon on a 6WD Wild Thumper chassis!

Who thought robots and potatoes could be so much fun?

Update 1:   Its been almost a year since I post v1 of my robot. Wow! After being lost in RC world of airplanes, quadcopters and helis for a year I … Read more
Locates fires and puts them out.
Using a
SplatBot MKIII is my first attempt at a fire fighting robot. The "Wild Thumper" 6WD chassis is the production version of my original 6WD chassis and the new flame … Read more

Motor Control for 6WD Wild Thumper

Open call for suggestions:

I own a bare 6WD chassis "Wild Thumper" by Dagu, designed by Oddbot. And I have (2) "racing packs". Those are basically 6 NiCd cells in series, providing 7.2 Volts nominally. The motors are rated for 6 V. Stall current is listed as 5.5 A.

Even the most basic speed control will need some sort of amplifier for the PWM signal. Let's start very simple. Just speed control. Just one motor. One direction. What kind of transistor shall I buy? And what kind of circuit shall I use?