Let's Make Robots!

Recently Collected Posts

Seeing OddBot's Chopsticks robot on YouTube was a revelation to me. I all of a sudden realized one didn't need to spend a lot of money making a walking robot. Not … Read more
This is a hexapod I've been working on for a while. It's a kit from Paul K. The hexapod uses HobyKing HXT900 servos. I was able to get the robot to successfully … Read more
Autonimous surveillance of my backyard, eventually.
Harvey is a Wild Thumper based surveillance robot intended to operate outside. Future plans are to be able to patrol my backyard with wireless video transmitted … Read more
capable of moving forward, reverse left and right using single motor
28 Sep 2014 Mechanism and video update: 1st video : Description and Mechanism 2nd video: Full working order 3rd video: Testing with battery Read more
Gets you in touch with the world
This is a displacement resistance type touch sensor. It uses conductive foam as the resistive element. If you would like to see a video Walk-through of how to … Read more
Ok, so I have wanted to build a robot for a while, but school prevented me from starting anything.  At the beginning of this summer I bought a Raspberry Pi to just … Read more

Pet (work in progress)

I have not built my first robot yet - waiting for the parts. But I have the plans for my second robot ready. He, just a little ambition :D.  My second project will be a prototype for a robot that can be sold as a consumer robot. I will call it Pet - working title.

This is how I imagine it. When you order Pet, it will come in a nicely designed box. In that box you will find a shiny sphere, a little smaller than a soccer ball. One size of the ball will be flat. You will also find a smaller box that contains a base plate with an electrical cable. No on/off switch. No manual.

Simple servo bracket

Birdmun an Hi jinx got me looking into open scad, he is code a bracket for a servo you can adjust just by playing with a few numbers, the software is free and there's some tutoreals on line and youtube, you can export STL's as well. I did not think I would like it but after playing with it, my mind is more open, for simple shapes it is very fast.

http://www.openscad.org/

Servo Bracket p, li { white-space: pre-wrap; }

difference(){

union(){

Capturing Data from 7-Segment Display

Something I've wanted to do for a while is to be able to digitize the data from cheap sensors with a 7-segment display.

I decided to give it a try with some USB charge meters.

I purchased four of these meters.

I opened up one of the blue ones and probed the pins to see how the 7-segments were wired.

Servo problems!

I'm having a lot of problems with the servos I'm using to build a quadruped robot. I should start by mentioning that I bought the servos from Dagu like 4 years ago, BUT most of them had never even been unpacked until recently.

The problems are the following:

Flash Memory of Arduino Uno

 

Sketch uses 13,308 bytes (41%) of program storage space. Maximum is 32,256 bytes.

Global variables use 2,082 bytes (101%) of dynamic memory, leaving -34 bytes for local variables. Maximum is 2,048 bytes.

processing.app.debug.RunnerException: Not enough memory; see http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing your footprint.

Looking for a custom built inspection robot

Hello to all the community,

I'm looking for a micro TIR (tactical inspection robot) either tracked or wheeled but tall about 1,7 cm , wifi controlled by pc or android tablet and with cctv camera.

Roams, seeks/avoids light, line following, hokey pokey, acts silly
Using a
Lil·li·pu·tian Read more
Hello,  After buying an Arduino starter kit and playing a little bit with it I found out that it's possible to create robots with it. Doing some research on … Read more

RG2

New Video 8-24-14      RG2 combines several ideas i have been thinking about for a few years.      With one CR Servo it can go forward or turn left or right. … Read more
An air muscle contracts when is is pressurized
I have been looking for alternatives for servo motors, and I stumbled apon air muscles. It seems to me air muscles are very promising they can do a significant … Read more

Homemade Artificial Muscles from Nylon Fishing Line

There was an exciting discovery that hit the news last month -- researchers at the University of Texas learned that appropriately coiled nylon monofilament line could be used to make heat-activated artificial muscles. Here's an article on it: http://io9.com/scientists-just-created-some-of-the-most-powerful-muscl-1526957560  I've had some success duplicating their work as a hobbyist -- in particular, I've gotten one of these muscles to lift a suspended ferrite core about a centimeter, then relax again.

Robotic parts made with simple tools.
     Even with 3D printers and milling machines accessible nowadays, I guess this post will interest some people. From time to time, I am asked how I produce my … Read more

Controlling a Raspberry Pi / Arduino Bot from the Internet Part 2 of 3

This is part two of a three part Series to explain how I control my BotTwo semi-Autonomous Robot from a webpage on the Internet. 

Here is a simple upgrade for the Raspberry Pi camera. STL files Here :- Thingiverse_Chiprobot Although the stock lens is sharp ..... it lacks that spycam … Read more

Which MOSFET to use for battery voltage measurement?

Hello all,

I'm currently building a buoy with a string of sensors that measures temperatures at different dephts. I'll be making a blog or Something Else later.

The thing is, I want to measure the voltage of the battery (Li-Po) to be able to predict when it needs to be charged since the system will operate "out-there-in-the-middle-of-nowhere".

[Update: Chapter PROGRAMMING - Chat bot mode] Introduction x2 is a small humanoid robot platform for my current research. The specifications are as following: Read more
Bitbang Control over FTDI
This is a short note on how to setup a C programming environment for the FTDI chip in bit banging mode, since that's what I had difficulty doing. There may be … Read more

Join the *LMR 3D Print Club*

Do you have a 3D printer?

OR

Interested in getting prints done, but have no printer?

Let's help each other printing more stuff :)

There may be a 3D printer or someone who'd like to pay for a print close to you..

Super Cooler Code

Hi guys as some of you know I've been working on code for a project I have in mind, it not a new idea, lots of folks are doing it http://freeaire.com/ , I just want to put my take on it, and perhaps save some store owners some money and make a little myself.

 I live in Maine USA, winters are pretty cold here, lots of small stores have walk in coolers for keeping beer and soda code, so why not when its suitable use that cold air to cool the walk ins, a typical 8' by 20' walking cooler costs $250 or more a month in electricity to operate.

Some design stuff

App controlled using arduino uno, android
The robot will think using a cheap smartphone(<80€) and use gps, accellerometer and compass data from the phone to command arduino through bluetooth or host … Read more
Walks using 3 servos, makes sounds depending on its environment
Using a
So, now that I've built a couple of bots, I thought I'd try making one of those Bottlebots that they have on TV, you know on that program where they fight? What's … Read more
Follows light and avoids obstacles
Using a
Oh,I thought a lot for the name of this bot,finally decided to name it CLIMBEX. Climex is a kind of beetle, and since it can climb small obstacles, I gave it this … Read more
22 Jan 2015 Update: Web Interface Control: Graphic Design (completed) Link to Blog Post Notice: I jumped ahead to Phase 9 and will finish it to establish web … Read more