Replacement motherboard is in

The replacement motherboard came in for my tank today.

I added lots of switches, buttons and LED's while I waited for it over the past few weeks.

Thank goodness it all worked!









The red and yellow bottom LED's are for motherboard power LED and HDD LED.
The big red switch at the top right is for master power.
Below it is a green LED and switch for motor control power.
Below that is an amber LED and switch for servo controller power.

To the right is a power(red) and reset (black) buttons for the motherboard, and between them is a 12V DC jack for when I dont want to run off the battery.

Replacement drive wheel

21st Century toys was kind enough to send me a free replacement drive wheel for tank. The original was cracked and tended to slip off of the brass drive nut and then the nut would just spin in place inside the plastic housing. The corners had worn away so bad that it was becoming a big problem.

You can see the small crack here.


This is the brass nut that drives the drive sprocket. The drive sprocket is held on only by the tension of the plastic around the shaft and the tendancy of the tracks to keep it in place.