Let's Make Robots!

Back Once Again

So after a long absence, I've decided to lurk around here a bit more recently.  I'd lost interest a bit - I blame the lack of a dedicated area for tinkering - having to clear up stuff at the end of the day, then lay it out again got a bit frustrating.  Plus, I got distracted by other things :-)

So anyway, I'm back now, relearning some things, doing a lot of reading, studying a maths course on the side, programming at work, and maybe just maybe I'll get a chance to make something....

Wall avoiding aimless robot
Using a
Here's the photo of my first original bot - HairyBot 1, so called due to the abundance of wires from this breadboard on wheels.  It's a pretty simple setup, made … Read more

2 Wheel Drift

I have a 2 wheeled robot - 2 GM10's with little thin wheels.  I've hooked them up to an arduino with an L293.  I have it going forwards, backwards & turning well enough.  The problem is when going forward, it seems to drift to the right slightly.  Any suggestions as to what the problem might be?  Do I need wider wheels?  A proper castor?  (ATM, the front of the chassis rests on the ground). 

Basically, what I'm asking is, with 2 small motors and thin wheels, can I expect a bot to go in a perfectly straight line?


Connecting Abritrary Wires to Breadboard


I've got a pair of GM10 Solarbotics motors with very thin wires.  I want to connect them to a breadboard - what's the best way of doing this?  For now, I'll probably solder them to some connectors cut off the jumper wires I normally use, but was wondering if there are any better suggestions?


In the meantime...

Nearly a month since my last (and first) post, I thought I'd post again to show that I haven't disappeared completely.

Recently, I've been trying to get my electronics up to speed.  So I've been following the excellent, extensive documents at http://www.allaboutcircuits.com/ - if you export them as PDFs they make a great substitute for books.

My First Robot

I thought I'd wait until I'd made my first robot before making my first post.  As you can see below, it's a complete rip-off of the (excellent!) first robot tutorial.  The differences are that I had to tweak the code to make him move forward/left/right properly, and also that mine is a bit more hairy due to an abundance of wires :-)  Not the sleekest of robots, but he'll be cannibalised pretty soon.

first robot