So, Tubby Bot is exactly the same in most respects but he now has a wooden chassis like most of my other builds and in keeping with the tub name he is round, with a radius of 100mm he isn't small. I kept the same colour scheme so he would be similar but he is a lot stronger.
As you can see I have used the same sensor as before and the motors are the same as well, micro servos modified for 360 degree rotation, the timber is MDF, 3mm and the support rods are 10mm dowel at 50mm long.
I made up mounting brackets for the motors and I also made the wheels again, they work so well and at 30mm radius give the bot excellent speed, for my slow bones that is. My new best friend, Hot Glue, was used again with this build but important components were bolted on.
All the internals are from V1.9 and even mounted much the same way, I used a lot more hot glue to strengthen the wiring so it is a lot harder to remove so with luck little fingers won't damage them. The little servos coat less than $3.00 each so they can be replaced as required and the wheels are easily repaired.
I put a centre support so I could mount the Arduino Pro Mini on it as before and positioned the switch so it is just in front of the caster, operated from underneath and it all works very well. The Sketch is the same as it works best of all the bots. Anyway here is a short video of V2.0 in operation and me chasing it around.
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