Let's Make Robots!

My Big-Base Robot

Follows things with certain colors, shapes, etc.
Bill-O-Materials.xls19.5 KB

I have posted many ideas for robots, but this will be my second on this website.


It is a Butler Robot. It will have a 12v Mini Fridge onboard, with a springed DC Solenoid wired to a Max232 chip, to the USB of a local laptop. An onboard wireless camera will be linked to its radio receiver connected to a TV Tuner (RCA inputs) to the USB of a computer. The computer will be running image/video processing software to detect and follow distinct blobs of color, shape, etc.



The final designs with some calculations for finding the inertia of the entire robot. Really to figure out the stress placed on the wood.

(I went with 3/4" plywood) Eventually I will paint it white.



Plan rendered in Google Sketchup, obviously not drawn to scale



The two 12v 24AH batteries



Closer look



Sabertooth 2x25 Motor driver, very strong and reccommended by me! Capable of 25A load per channel, and 50A fully



The robot head next to my 1st place baseball trophy

When I received the head from this toy:


 I gutted it. Of course it didnt look as nice as the model picture. I took out the leds inside as they were not bright enough, and added my own red ones for the eyes and blue leds for the headlights above (where the red and blue panels are, I took them off) 



The hefty motors

~from a Jazzy 1100 Wheelchair




Edit #1:



 L brackets



Caster not screwed in, because I need to first see if the wheelchair motors will have clearence, and everything would be flat. Yes I know thats alot of brackets, extra sturdiness! :)








 Vertical slab thingy, I needed four of these guys










I do not thinki it is going to hold at all


Future alterations:

  • Use XBee Modules... to make it go wireless 
  • Upgrade Batteries to 72AH

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Hi, why dont u use Roborealm software it support sabertooh as well http://www.roborealm.com/help/DE_Sabertooth.php


I am still curious, how can i control sabertooth autonomously, like moving from one point to another point with a turn and rotation


To all users of the sabertooth 2x25,


What mode did your use nd had success with it? Any tips?



amazing. you must be a master at programming. i have yet to make a programmable robot, but i'm working on it. my budget is like 500 bucks every year or so (scattered) here's my biggest bot: http://letsmakerobots.com/node/5245 in total it will cost like $600, but at that point I would have saved money for literally years (can't get a job just yet). btw what do you mean illegal camera!?
2.1 GHz is reserved for the military/government, I might not even stick with wireless. I picked up a 30 fps wired webcam, maybe use that
i thought it had something to do with that... but actually 30 fps is pretty decent for a robot's eye, but will the computer be onboard or off?  will it be tethered now that the cam isnt wireless?
30 fps is optimum for a webcam, otherwise it would be NTCS. I am not sure if I want the computer onboard or off. I cannot afford a Laptop atm, so I may have to use a couple USB extension cables for the Sabertooth.

Wow that looks a lot like what I’m trying to accomplish!!! I might as well go add it as a new post with a few pictures and stuff.  Question, how did you get that tracking to work and can you interface it to a servo yet? I have done it in Microsoft Robotics Studio but I couldn’t figure out how to interface servos, or speed controllers. Anyway I like what you have going so far.

Yes I can interface servos, but I wount need another motor controller, most likely polou's serial servo controller. The proggy automatically identifies any com port used as a speed controller and transmits ttl to and fro.

Super bot, but have you made the tracking software yourself? Is it difficult or not? And what IDE you use to program a laptop with C#? Please answer to me, I'm looking for informations about this... I'd like to learn because is long time that I wanted to make a bot with "intelligent camera".

Congratulations for the bot



I used snippits from some open source image processing proggies. It wasnt difficult only because I had something to work with and knew what I wanted. By IDE I am guessing you mean compiler? And I used a combination of Visual Basic (Msoft) and Bloodshed Dev C++.

Dont congrat me yet... it still has to move :)