Let's Make Robots!

Recently Collected Posts

I am building this robot for a course i am currently enroled in, the Edexcel Extended Project Qualification (EPQ). This course requires you to complete a project of … Read more
This i a robot i am working on as a part of a school project. this is the first functioning prototype, it is made useing laser cut 3mm acrylic sheet in an assembly … Read more
I just finished my the board for the Vulvan Five and had it sent away to get CNCed.  I have the capability to do homemade PCBs but this one was a little big.  So … Read more
Hi guys, Thought it was about time I posted, this is actually my second robot. My first can be seen in some of the pics beside Lollypod. It used an 18x project … Read more

Serial oscilloscope

Hi guys,

I'm currently programming a software oscilloscope based on C++ and DirectX, thus the performance is very good. It works directly off the serial/COM ports. I was just wondering..is anyone else interested in such a thing?

I'm programming it for my Arduino BUT it should be able to work with Picaxe(or anything else) too. It's not gonna be a fancy pro application, but it works pretty damn well :) For now it's rather limited since it only accepts 8 bit values...well for now...

Maps environment, Speaks, Learns, Shoots
Using a
Sorry about the lack of pictures. Here is another one of my long term work-on-it-somtimes robots. For this robot, I decided I didn't want to screw around with a … Read more
This is actually not a robot, sorry. But.. If you have an old laser-pointer, and are building robots:   Hook up the laser to the microcontroller. Now you can tuen … Read more
saves versions of files during dev process of code
Source control is an important part of development, whether it be for a website, a major application, or robot instructions/thoughts because you never know what you … Read more
Need a bendable gearshaft quick?
A lot of Eureka moments have happened while making Mr. Tea, I came accross this idea, and had to share.   I was looking for a cheap way to make a bendable … Read more
This bundle includes all the parts to build the popular Start Here project from letsmakerobots.com. Save over 10% off buying the parts individually - more than … Read more

Arduino + a doorbell's wireless modules

hello, hope you had a merry christmas, and will have a happy new year!

I found a wireless doorbell, and i would like to know it it would be possible to attach the button of the doorbell, to the TX pin on the arduino, and the receiver to the RX pin, sorta like this:

doorbell.jpg 

I think i would then be able to serial print what ever i want, and serial read it with the other arduino. say controll severall motors, even if it just has one button, would this be possible?

Blocks use the { and } charcaters to create collapsable code! In the Options menu of the Picaxe-editor, check "Use Collapsing blocks" in the "editor" - tab. Then … Read more
Anyway guys I was looking at other people's projects here on the site and I ended up clicking a link a link to trossenrobotics.com. After clicking around for a bit … Read more
LED matrix wall is suddenly very hot recently. I also make one for fun. It can be used as a speech synthesis talking face, message display board, a Internet … Read more
Portable, store-able, fences for robots
So I got sick of finding books, empty cases of beer and various planks of crap to use to keep bots from running into furniture and the like. I though for a while … Read more
My old printer broke down and before throwing anything away I always rip things apart hunting for parts that I can use in other projects. Most of you probably does … Read more
Take impressive pic's of your bot with this box
In this walk-through, I'm going to show you how to make a box in which you can take awesome pics of your newest creation for cheap! With it, I took this pic of this … Read more
This is imo a great way to help ppl who are new to electronics understand some of the basics of circuits.
 http://en.wikipedia.org/wiki/Hydraulic_analogy Being a helicopter mech and have years of exp in troubleshooting hydraulics I found this simple explanation of … Read more

n/a
My mom really looked up to my electronic Wiz and said: Build me an automatic trash can.  So I started planning. You can also build this as i show you how to cause … Read more
Archos Intro: The Archos is basically an I-pod Touch on steroids. Given the fact that it can multi-task, use flash when surfing the web, and run on the Android OS, … Read more
Drives around blind at the moment
Using a
Well, here's the post about my first robot. It's not yet finished... so bear with me as I iron out all the bugs. I purchased an RC Jeep at Walgreen's (US drugstore) … Read more
This project is my very first robot project. It has a cybot foot base with 2 DC-motors and 1 wheel in front. I use an Arduino processor as his "brain". For now my … Read more

Picaxe :- Pwm motor controlling and servo scanning

I wish to connect 1 or more servos to a picaxe 28x1 .......with 2 motors controlled by pwm

So Far :-

I have managed to get two motors working with pwm control . (jumps on table in amazement - its my first picaxe enterprise)

I have used pins 12(pwm 1) and 13(pwm 2) for the motor control (with output 7,6,5,4 for direction ie via an Ld293 chip)

using  pwmout ....... pwmduty commands - works well.........

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

Idea: A simple way of doing balancing

I was just cleaning up my desk (a little anyway), and found myself sitting with the guts from a servo.

In essense I had:

A potmeter. If it was turned to one side, a motor would turn to one side, and vise versa. A little turning = a slow motor, hard turn = fast motor.

Hmm.. interesting..

Now, what if I was not turning this potmeter, but a simple spinning disc, acting like a simple gyroscope was attached to it?

Then if the whole thing was tilting in one direction, a motor.. OR a complete servo (with guts taken out) would turn to one direction.

Motor Controllers For BIG Motors...

Hey all,

I'm working on building an electric bike... well, doing the research for it anyway.

Right now I'm thinking about motor controllers - which are pretty expensive to buy already built.

My thought is that I could just build my own. I'm just not sure if I could use the same schematics for an h-bridge, but just upgrade the components to ones rated for higher voltages.

I'll be working in the 24V to 36V range if that helps at all.

In my head there's no problem with it... but then again I'm still pretty new to the electronics bit. 

H-Bridge NPN vs. PNP

I usually make a H-bridge with 2 NPN and 2 PNP transistors but I recently noticed that there´s allot of schematics on the net showing it with 4 NPN transistors and I started wondering what´s the right/best way to do it??

 

H-bro.jpg

H-Bridge Motor Control for DIY Servo

I'm building a DIY servo for steering Yard Gnome. I'm testing some things out while I wait for the 24VDC 30 rpm 41 in-lbs gearmotor I ordered to arrive.

I'd like some advice on my controller.

H-Bridge

Test bed for a 6 legged, 3 servo walker.
Using a
I was so impressed by the video of the Pololu hexapod walker I thought I'd have a go at one of my own.  This is a rebuild of my initial attempt using a PicAxe … Read more