Let's Make Robots!

My first robot - Ziltoid the omniscient

Navigates and avoids objects

Ok, This is my first go at it. I will post more pics and some video as well.
Yes I did name him Ziltoid based on a Devin Townsend project. This is the first incarnation of Ziltoid here, I will work on a second one, probably just modify this one with speakers and sound. Ok, I had a little fun with the 2nd video. It does not explain anything, but it was fun to play with. Enjoy!


Ok, I can go over what I used now and costs. But first, thanks to Fritsl for the inspiration

and his how to build your first robot tutorial. Could NOT have done this or want to attempt

to do this without your guidance. The above tracks and chassis are from SUPERDROID

ROBOTS for $15. The chassis is solid and the parts that came with it to put it together

were tooled very well.


The two motors are from SOLARBOTICS, 143:1 ratio , 90 degree for

$11.50. I think next time I would go with a faster ratio, but this worked for a starter bot.


Since I really did not have some of the proper tools for this kind of project, I had to go

and get some basic stuff, like a glue gun, a better soldering iron and an extra pair of

hands/alligator clip circuit board holder. So add in an extra $40 bucks or so for that stuff.


Of course the whole thing is controlled by PIXAXE-28X starter pack with USB programming

cable. This was kind of the big single cost which was a total of about $73 from SPARKFUN.

The only problem I had, was once it came, the software CD was melted and un-usable.

No problem though, just went to the PICAXE web site and got the editor and manuals for free.


Add in L293D -Dual H-Bridge Motor Driver for about $3.50 from SOLARBOTICS. I could

not find the PICAXE servo upgrade kit anywhere that did not cost me an arm and a leg for

shipping, so I just used the 330 ohm resistor and had to do some searching for header

pins to hook up the servo and IR sensor. Found some 1X10 header pin connectors at

IEC for about $0.31 for 10. Problem here is that I bought like 10 sets for about $3.10

and paid over $9.00 for shipping. Lesson learned? Yea, buy whatever you can at the same

site at the same time and save on shipping. Used a Hitec HS-322HD servo from ROBOTICS



I used the Sharp GP2D120 IR sensor with the IR sensor cable from ROBOTICS CONNECTION.

Cost for those was $9 for the sensor and $3 for the cable.

Other than the basic design change with tracks instead of wheels, the only other change

made was I added some header pins to the A/B motor outputs and connectors to the wires

from the motors so I could easily add/remove the motors and or board to another project

If I needed to. This was an awesome first time experience and thanks again to Fritsl and

everybody here for there input and knowledge. Hopefully this will help some other beginner

start on his, or her's robot. Now on to Ziltoid II.....INDEED HUMANS!!!!

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Sorry to bother you guyz so much

im a novice in this field and i am very much interested in making this kinda robot.

What exactly is the name of the differential steering.

where can i buy it

It is a trick. Or rather a method. You turn the left wheels forward while turning the right wheels backwards. That makes your vehicle turn in place. Because the wheels on either side turn at different speeds.

It is also possible to turn one set of wheels slightly faster than the other. The vehicle will still move forward, but swerve slightly to one side, thus making a wide turn. Check the "start here" link fromthe menu. That robot does also use this trick.

How du yu turn this thing
Differential steering. The left and right tracks run at different speeds or directions.

I have to agree. I will absolutely help with any questions, but to be honest, this is Fritsl code with modifications to handle the motor and servo differences and he has his posted http://letsmakerobots.com/node/17 . But if you are having a specific problem let us all know and I'm sure you will get the answer or direction you need. And doing it yourself with guidance from this site is the most rewarding way to experiment!!! Good luck!!!!!


Getting a huge dump of code form someone will only be confusing. You need to wire something up and do things slowly. Get a LED to blink, then hook up a servo and get it to turn. Then hook up motors and get the thing mobile, then get your IR sensor to work. Do things in small steps.

If you got a huge code dump you would need to know how to change it to match up with the pins on how you wired it. Take it small and slow...

Yes :)

And have fun with it, and then ask specific questions if you get stuck.


/ Fritsl

Hey, dude, I am about to ban you or something, this is second warning.

You have asked just about this question at another post, you write HELP ME etc.. Hey - why don't you help somebody or help yourself. We are all like you, and imagine a mess this site would be if we all wrote HELP ME, and asked the same questions over and again; It would not be worth reading for anybody :)

Please try to keep your comments in a way so that everybody get's something out of reading them & the answers..


/ Fritsl

I was plannig on making the exact same robot with only 2 slight differances. Thanks, now i am  sure it is going to work!

I look forward to seeing what you build. Please be sure to post your project and with updates if you can and if you can get video even better! Good luck, can't wait to see it.