Let's Make Robots!

Recently Collected Posts

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
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
this is my home made omniwheel , it`s very very easy and cheap to make one ,and i`ll show you the parts and the steps to make it … Read more
Pretty basic following of Frits' awesome 'Start Here' robot.  I bought all the parts from Solarbotics and Robot Shop with a few random things that I forgot from … Read more
Chasis completed. it was constructed from a low weight holow plastic from my pool deck fence its very lightweight and strong at the same time  new video up!!!  … Read more

new project: solar rover based on Picaxe 18X

the idea is to use a picaxe 18X as a brain for a little solar rover.

i have discovered that a picaxe can function as a solar angine because it works down to 2.5 volt

so im planning to use a solarbotic 33x37 policristalline cell wich provide 6.3V - 30ma

picaxe remain in nap mode untill caps reach a voltage near to 3.5 v then activate motors to accomplish an action loop....

and so on....

i use a 74ac240 as motor drivers and geared pager motors ...

 

by the test i have done till now it seems all can work properly....

 

Make your Ping))) sonar work!
So you've made your first robot with an infra red sensor and decide to upgrade it to ultra sonic. after a trip to Radioshack you look at the sensor you bought and … Read more
Seeks the light, but afraid of contact.
My first robot built... Based on the classic "Mousey the Junkbot" by Gareth Branwyn. (http://www.streettech.com/robotbook/mousey.html) Basically, it's a scared … Read more
Will navigate around house, self dock with charger, map, fetch beers
Using a
Here is my current project and first post:   Read more
Navigates using ultrasound
Using a
Behold the first of many robots to come - my LMR. It is using Picaxe 28X1, SRF05 & motors/gears from Picaxe store. These motors & gears (available at … Read more

Cute Lego Felt Tip Printer

A friend forwarded this to me. Cool application of Lego to make a printer. The video author's comment on YouTube:

"Lego felt tip 110" printer connected to an Apple Mac.  This is not a kit you can buy and does not use MindStorms. I designed/built/coded it all from scratch including analog motor electronics, sensors and printer driver, the USB interface uses a "wiring" board.

Once again, this is not my work. I'm just posting something I found cool.

 

 

Wireless Control

im looking to control my picaxe robot wirelessly by either my computer or remote control..
what is the cheapest method and how would i go about doing it?
thanks muchly

I know some won't consider this a "robot" because it lacks a brain, but it is still fun and worth mentioning. Anyone who is familiar with Cub Scouts, Boy Scouts, or … Read more
On Picaxe: sound 1, (110,3) is NOT a good idea, you should allways write sound 1, (110,3) low 1 (you do not need line breaks, just write it as above)   Being used … Read more
So i finally managed to have the Picaxe USB Cable working under linux. Not the programming editor of course, just the serial connection. You can use it to … Read more
I've started on my own version of the Herbie-stlye mousebot. They are so simple and fun, I couldn't resist. So far I have the basic circuit breadboarded and … Read more
A simple pick and place robot which is my first robot. I haven't made it autonomous. But it is possible to do it. Read more
this is a new type of beam robot: a talker it  is just a prototype and a first of its kind,when it is in sunlight ,it springs to life, it can talk or chew all of … Read more
    Based off the ever popular "How to build your first robot" by Fritsl, this is the most up to date version of my first robot, named Robet (Robe-et) Read more