Let's Make Robots!
Hello LMRians, This is a PID implemented line follower using an Arduino ATmega168 clone, Pololu QTR-8RC sensor array, a Pololu TB6612FNG Motor Driver, and super … Read more

Two +V and 0V

On the Picaxe-40x2, there are two pins for +V and 0V. Am I supposed to conect both of them? What are they for?

Allow just about any sketchup model to be animated within a real time physics engine
I have seen that many users on LMR use google's free sketchup design software to get a rough overview of the appearance of the complete robot. Did you know though … Read more
Answers beginner questions on how to post pictures on LMR.
I see a lot of questions on the forums sometimes where a member asks the person to post a picture, and the person doesn't know how to do it. Well, here's how to do … Read more

Cheap PCB's

You know, I just gotta plug Sparkfun again...

So I finished designing Walter's new main board (now set-up like a 28x board with all servo connectors) and was shopping around for cheap "only-one-board" PCB people. Once again, Sparkfun rocks! --They do 2 sided boards with all the trimmings for only $2.50 a sq. inch. There is a $10 set-up fee but I just got an email back and learned that is per order... You can have as many different designs per order as you want!!! Hell yeah!

By the way-- Here is Walter's new brain(s)

I'm not sure how I stumbled upon this site but find myself visiting it on a daily basis now.  I spent the better part of a week reading through a numerous amount … Read more
Recently I've noticed some people are a bit unsure of how to regulate their robots batteries and since there was a tip/walkthrough on batteries recently I though … Read more

Circuit board 90% complete

So this is the first pic when it was about 50% complete, with the picaxe adapter mounted. The jumpers next to the adapter are used to select which picaxe to use when programming. 


The next image is with the pwm circuit that I had worked on, mounted on the main circuit board.

The 08m(empty socket at bottom right) controls the motor pwm control circuit.

The 14m(top center) sends signals to the motor pwm control circuit.