Let's Make Robots!

Motor Control for 6WD Wild Thumper

Open call for suggestions:

I own a bare 6WD chassis "Wild Thumper" by Dagu, designed by Oddbot. And I have (2) "racing packs". Those are basically 6 NiCd cells in series, providing 7.2 Volts nominally. The motors are rated for 6 V. Stall current is listed as 5.5 A.

Even the most basic speed control will need some sort of amplifier for the PWM signal. Let's start very simple. Just speed control. Just one motor. One direction. What kind of transistor shall I buy? And what kind of circuit shall I use?

Swiss Milka Cow "Colour Match System"

Swiss Milka Cow project takes on some colour.

Firstly :- New body made (old one to flimsy) and also replaced motors again .....now with 10,000 rpm racing set (its an easy mod to do on all the GM motor range - just have to be careful not to strip the gears.....) - also IR remote installed and an Arduino Mega as brain.

I have removed the old bi-colour eyes and replaced with high intensity RGB ones instead.

Also i have installed a RGB led into the lower Jaw bone and along side an LDR to detect the reflected colour.

Rorcle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

New plastic bumper, LCD mount out of expanded PVC, will be acrylic when I get the funds for a heat gun.

haven't made my decision as to which LCD I'm using.

AVR C is hard!

Well, last week I got several packages of parts with lots of sets of ten. I got ten 8pin sockets, ten CR2032 batteries and ten battery holders, and most importantly ten attiny85 MCUs. I figure I can use this set of parts for a bunch of small projects, but my first project is to make a tiny bot! I've already got some tiny pager motors, and some ir emitters I can use as light sensors.

Propeller Powered Paxton Pinball

I thought this was pretty cool & and it's propeller-powered.  Ben Heck (Who I heard of from ripping multiple video game systems apart and putting them in smaller cases) made his own pinball machine, with the theme of 'Bill Paxton'.  It's all powered by a Propeller - he writes about starting out with a Basic Stamp, and moving on to a Prop here.  It was pretty well covered by the media.

January 2010 Release of LMR

Just for the historical records....

New release of LMR January 26, 2010:

  • As always a lot of under the hood-work, regarding spammers and security.
  • New content type: "Something else". So many times people have made something great that was not quite a robot. Now it can be published, see front page, Add content.
  • New exciting components-section - try it out on top menu; Components

As always, 95% of the work was done by Del Rudolph. Thank you for your amazing work!

Attempt At Making Robot Wheels

Hey guys,

It has been a while since my last post.  The Vulcan Five is not looking too good beacuse of the PCB fiasco.  I'm trying to salvage that situation, but its going slowly.  So unfortunately for this coming up competition it will not be entered.

However recently I have been experimenting with making my own robot wheels for maximum grippage on my sumos.  Here are some puctures of the results.

V3 - Borg it is!

Hi all!

Here is quick rendering on how V3 will lokk like :) Almost finished the design, still little things to take care of, I can start cutting soon.

 

Has a Borg feeling to it :D 

 


Update - Z-axis

Or how to get from this:

 

 

 

 

 

 

 

 

Looking for Feedback on PICaxe Platform Module

I've been working a PICaxe platform module.  I did a V1 a few months ago, and recently re-did it.  Here's a prototype of V2;

4442672232_7861745a51.jpg

I've used the same power stage as the Propeller Platform sD - it's 5v @ 1.5A and 3.3v @1.5A with an extremely low dropout of 100mV.  Standard power and programming jack, and it has power indicator lights.

I need to make a few changes, so I thought I'd get additional feedback.

The Sparkler

Recently a funny robot idea came into my mind - The Sparkler.

What does it do?

The Sparkler is a tank track robot. It drives around and waits till you clap your hands. If you clap your hands, it puts a sparkler out of its container (similar like a quiver for arrows), lights it off, waves during the sparkler burns and throws the spent sparkler then away. Yes, defenitely outdoor enviroment is recommanded. And I rememeber now, Picaxe has the music tone playing option "Happy Birthday". What a birthday surprise!

Mindstorm NXT 2.0 N900 - Twitter-controlled Robot

Nokia ran a competition that asked hackers and modders to push their new device, the N900, to its limits.  Judges selected the three best submissions and one of those was 'NIKO The N900 Robot' - a robot controllable through commands on Twitter built out of Lego NXT Mindstorm 2.0.

FIRST Ny regional

So i've been a little inactive lately, due in part to my involvement in my schools robotics team, but i'd thought i post a few pictures from our competition over the weekend at the javits center. Not exactly the greatest pictures but the competition was really cool.

 

Sorry it's taken me so long to update.

A little more on the robots:

Electric Bike - WIP

Pictures: http://www.flickr.com/photos/48476919@N08/sets/72157623504149065/ 

I'm starting work on an electric bicycle. I put an ad on Craigslist last night for a bike in any shape - and ended up getting two bikes for $20 that are in pretty good shape. One is missing a pedal... but that's all.

my very First bot - eYandron1

eyandron1

 

 


 

My very first encounter with electronics - a very simple manually controlled robot. The main brain controlling it is a Attiny2313 + a motor driver board based on TIP122 transistors. At the time when I built this, I had no idea about a chip called L293D!

SolderJunkie Construction

2010.03.14

Hi, I have started work on project named SolderJunkie. I want it to be a motorized solder fume extractor. He is going to use a Picaxe 28x1 as his brain, DAGU IR compound eye, few servos and CPU cooler for parts. I only started construction of mechanics, so far. Here is his first pic:

SolderJunkie01.jpg

Automated Light Switch - Laziness Prevails!

The Video explains all.

This is my automated light switch, built in a little under 2 hours. Just one application that a servo can be used for.

The servo is just mounted on some hastily cut masonite, the triangular brackets are just glued to the main board with PVA, and everything else is held together with double sided foam tape.

 

DSCF0832.jpg

 

 DSCF0834.jpg

Quick mock-up of IR obstacle avoider.

What is it?

This is a quick mockup used to test the IR obstacle detection circuit which came out of this forum topic:

http://letsmakerobots.com/node/17316

It uses this circuit:

brainlessbotAmended.png

Simple Optical/Rotary Encoder Generator

Was building a simple Rotary Encoder for the ARP platofrm yesterday. Could not find a simple tool to generate the pattern according to my needs, there were some Postscript based tools but they did not work on Windows.

So here is my little script to generate it ...

PHP Code:

header("Content-type: image/gif");
$size = isset($_GET['size'])?intval($_GET['size']):200;
$size1 = isset($_GET['size1'])?intval($_GET['size1']):0;
$count = isset($_GET['count'])?intval($_GET['count']):10;

Supersonic Golf Ball

Well, good news everybody! I have managed to get a team of people together that are willing to pool resources together for construction of a high energy supersonic Golf Ball cannon, complete with remote electrical control and operation. The Cannon will feature complete autonomous reloading of the barrel. I will have to create large quantites of gun cotton, otherwise known as nitrocellulose. Nitrocellulose has been used as a propellant and explosive for many years.

Turning my RC Jeep into a robot...

A few weeks back I bought an RC Jeep at Walgreens with the intention of turning it into a nice little bot. However, when I took it apart and realized that it was all surface mounted parts, my heart sank a bit as I don't really know what I'm doing...