SplatBot X2 is one of my many re-creations for DAGU. Before I came to work for DAGU, splatbot was selected to become a DAGU / LMR robot. It has been one of those projects that keeps getting put aside. This will actually be SplatBot MkIV as Mk III never got finished. I am posting this to show the work that goes into making an LMR robot into a DAGU robot kit.
SplatBot MkI was built Xmas 2008 and was my first robot that did more than avoid obstacles.
SplatBot MkII was more sophisticated and less clumsy, it could write LMR in 2 colours.
SplatBot MkIII was just getting started, using my 6WD chassis when I was contacted by Jack from DAGU. I started to rebuild MkII for DAGU but many things were not suitable for a mass produced robot so I really had to start from the beginning with wheels and motors that were cheap and easy for DAGU to obtain. Thus SplatBot MkIV began.
Dagu was happy with the mecanno style frame and sent me sample wheels and motors to experiment with.
This was sent to China for their engineer Gao to begin work with. Soon after I moved to China. Gao had a metal prototype made and I redesigned the schematic to work with the new picaxe 28X2 (click on image for full sized diagram).
I have tried to make this robot as versatile as possible utilising the new X2 features. There is an I2C/SPI socket to allow interfacing with most of the breakout boards available such as memory and real time clocks. There are enough analog and digital I/Os available to add the compound eye (IR tracking) or even to replace the gun turret and waterbottles with a small robot arm.
This is the prototype PCB. The motor control circuit is identical to the Mr. Basic motor controller but using FETs. The third FET being used to control the waterpump. Another board may be made later that can stack above this with a 3.3V regulator, Xbee socket, RTC etc. depending on sales.
Here is the metal prototype as it is (15-10-2009)
The gun turret needs to be moved back to allow for the PCB being longer than anticipated. Batteries and waterpump need to be fitted.