Let's Make Robots!

Recently Collected Posts

How to make a battery charger (Question)

Are there any "rules" when choosing a battery charger? Lets say I have a 5v supply with 500mA current. What should the charger specifications be?

This is my snow plow bot. It is currently RC but I want to convert it to wireless for internet control.Weighs about 200 pounds. Some Specs: Read more
This is a robot I made for my son Shi Sen over the Christmas holidays. Some of the blocks are original K'nex blocks I brought with me from Australia. The other half … Read more

The robots we've always wanted

In a recent thread, some LMR members started listing robots they loved and which inspired them, either real or from sci-fi novels or movies. My interest in robotics also finds its origin in our great sci-fi canon, and people listed some really cool robots I'd never even heard of. I thought it may be interesting to split this off as a forum topic and hear about even more robots out there and how and why they inspired our fellow LMR members to build robots themselves?   

Adjusting for air/water current

First a terminology question:

What do you call the direction a boat/plane is pointed?

Yeah it is a silly nit, but I am documenting a design and people will pick nits. A simple example is a boat crossing a river. For simplicity, consider the river flowing from N to S and boat crossing from W to E. So the bearing/heading is E. But if point the boat due E you will go SE, so you have to point the boat NE. When I learned to kayak, this was called ferrying and the angle was referred to as "set", but I hate using such an overloaded term.

Slave Propeller Robot Control Code (Eddie Firmware)

The embedded video isn't showing up. Here's a link to the latest test of the h-bridge version of the Eddie firmware.

As I've mentioned in several posts, I've been working on modifying Parallax's Eddie firmware.

For better readability I have attached a pdf, which explains how linear regression is used for supervised machine learning. In this paper I also derived the general … Read more

Discuss general guidelines for self-balancing robots

I'd like to start a discussion to collect general knowledge of what to do and what not to do when building a two-wheeled self-balancing robot (SBR for short).  My hope is that this thread can become a somewhat comprehensive set of guidelines to help beginners and non-beginners build their first balancing robot or  achieve a more stable and successful subsequent design.  Things that I would like to understand include:

Printing with trimmer line

As many of the shout box regulars have found out i have my printer up and running. when i finished it i had no material to print with and a massive desire to see my monstrosity work amd remembered something i had read online.People were experimenting with trimmer line (the stuff thats used in weed wackers/weed eaters etc...) but last i had looked into it deltas and bowdens were the new and most people were running 3mm filament. well after looking around i found .065 inch line which measures out to ~1.68mm.

Soldering tutorial

Hey there

When first starting out on electronics, I found soldering really frustrating, mainly because I was missing a few good tips and tricks that make it a breeze! So I've just finished off a video tutorial, and thought I'd post it here in case anyone finds it helpful :)

http://robotblogging.blogspot.co.uk/2014/12/beginners-guide-to-soldering.html

-Chris

Arduino and a Chinese 32 channel servo controller

I bought a Chinese USC 32 channel servo controller on ebay a month ago. Last weekend I finally found some time to try it out. But I can not get it to work with my Arduino Mega, actually I thought there was something wrong with the board, unitl I downloaded the Chinese software for it, which lets you test the board. I connected 2 servos and the sliders in the program let the servos move. So the board works when using USB.

This is the link with the manual: http://www.torobot.co/usc32-manual

Spinning line follower or maze solver
I've now attached a 3D model in Sketchup. Scamper started as an experimental omni wheel platform. The challenge with omni or mecanum wheels is that you need precise … Read more

Depression

Not many people understand chronic depression. I doubt anything I write here will solve anything, but I think it's important that people recognize the signs of depression and learn to recognize them in themselves and their loved ones.

Most people make the mistake of confusing depression with depression. See, I've just done it myself. One problem for English speakers is that the word for depression (as in a chronic life-threatening mental illness, most often inherited) with depression (as in being sad for a few weeks due to a known cause).

Sugru, New bot building material.

I found this on YouTube and thought it was a pretty neat way to make some strong, flexible, temperature resistant robot parts. All the info is in the video, but basically it is like polymorph, only silicon based. Enjoy.

http://www.youtube.com/watch?annotation_id=annotation_756411&feature=iv&src_vid=azhI2yFsJVU&v=QCifobRF9Ac

Questions about Wild Thumper 6WD with Wild Thumper Robot Controller

This is my first post and my first attempt at starting a robot and programming said robot. I have some questions regarding my Wild Thumper 6WD with Wild Thumper Robot Controller.

I had bought a RC Car from walmart for about $15 to use with the Arduino Motorshield a while back (see here). Fortunately, I had taken some pictures before I … Read more
The robot navigates around avoiding obstacles by ultrasound and choosing the best way to follow.
Using a
The robot navigates around avoiding obstacles by ultrasound and choosing the best way to follow. The programming code is attached here as a .txt file. Download it … Read more
Obstacle avoidance using ultrasound sensor
Updated post with new parts, ideas, pictures, and questions Hello robotics community! This is my first post I have made here. Im fairy new to robotics and am … Read more

DAGU product support - Manuals

G'day everyone,

I have been designing products for DAGU for over 2 years now and have always tried to provide product support here on LMR. One problem I have had is that sometimes the manuals are too big to upload.

If you have any problems with these kits then you should ask questions in the component section. I answer questions there so that others with similar problems can look for answers.

The components on LMR are here:

    Hello all!This is my robotic arm project. It is almost finished it just needs the controller and a bit of programming it finish it up. Read more
The MeArm is a project I've been working on since February. It's an open source robot arm. I think this is the reason I've not shared on here before, this big white … Read more
Nightlight, Rotates Head, Blinks with Eyes, Children Fun
"What kind of party do you want to have my son ?" asked a mother her son. "A robot party!" answered the soon 7 year old boy.  A robot party without a real robot is … Read more
The Scamper chassis can move in any direction and each motor has a high resolution encoder so it should make an ideal painting robot. Think mobile dotmatrix … Read more
Multiple functions - aims to be an easy to edit robot with lots of accessable variables and functions within the software, these can be implemented in a meaningful in the main loop to make the robot function as desired.
You can see a side view here and a view of the casters here  I worked really hard on that acronym title. Chassis Read more

Mini Driver Mk II - S4A compatible

For some time now I've been wanting to release a new version of the Mini Driver with the ATmega328P. Then the Boss asked me if our controllers were S4A compatible (Scratch 4 Arduino). Now we do!

Video of Doodle Bot using this board can be seen here: https://www.youtube.com/watch?v=j95dTWg2-d0
Click on the picture for a larger image. Check out the features listed below!

This is a robot based on the concept of embodiment and emergence, a concept seemingly proposed by Rolf Pfeifer. It is also based on a presentation I gave in 2011 on … Read more
My first robot using Rover5 - roverbot! Objective: Night timeshift photography... Analyzing plants, photo capturing for 3D modeling.. WIP Components used: Read more