Let's Make Robots!

Chassis support for big bot... help please?

I have just resumed my project and still dont have a valid chassis idea, here are some pictures, please dont hesitate with any and all suggestions.

But some might not be considered because of the fact that I dont have a welder, CNC, lots of scrap metal.
I have not drilled on the caster wheel, because I think I might upgrade after realizing all of the bot's weight will be on the caster.

What kind of wood is this?

I bought $20 worth of wood and shaped it and everything, but I don't know if it is a very reliable wood. I bought it from Home Depot, however it was in the scrap/returned pile, and so didn't have a label, does anybody know what kind of wood this is by looking at it?




There are a bunch of pictures, just use the arrows and magnifying glass. 


Custom CNCing for you Robot?

Has anyone ever had there robot CNCed? If so what website did you use? I looked at BigBlueSaw and the stuff there is beyond way too expensive, a 7x5 inch aluminum rectangle (1/8") with a couple of holes drilled in is $81.00, beyond my budget severely. I also emailed many other sites, and theyre quotes are in the 300's. So does anyone know of any cheap CNCing service based website they could share?

How do i use this... (underside of a button)



how do I solder a wire to this so that I can use a microcontorller to trigger it via outputs?

My SRF05 Wont work with my Picaxe!!

I soldered everything up correctly as Frits's tut said, and when I plug in the power to the picaxe, after 7-10 seconds, the SRF05 board and everything gets extremely hot... Did it burn out? How can I see if the SRF05 still works?

How big is the difference between the GM2, 3, 8 and 9s?

I know the higher gear ratio the faster, but what is the difference between the fours, and is it that large?


The solarbiotics if that makes a difference

Oh and never mind the offset ones, the difference is obvious there.

header pins question

Does picaxe 28x1 microcontroller board use 0.60 - 1.0mm header pins (round or square).

How to connect the SRF05 to Arduino Decimialia?

How do I do this? Ive seen things for the PING but not the SRF05

Question concerning Wheels

Are these geared motors holes


the same size as these



it may seem like an odd question, but I bought two of those right shaft geared motors and I have yet to find an axel that fits inside of it (no i didnt buy the wheels that came with it)


In other words would those sparkfun wheels be able to mount on the hobby engineering motors(same size?)

Difficulty connecting Srf05 to Picaxe28x1

OK, at first I tried using the PCB connector thing (white, thick, multiple wire wires) and it got annoying because I wasnt certain which clip would be for which wire, and now I am facing even more diffilcuties. I took apart a computer recently to find spare parts, and I found a couple 4 pin female ports, I conected a couple wires to it, and isolated the one at the end, a yellow one. Now, I dont know If I did it right, but I attempted to solder the one wire to the actual board, was I supposed to?