Let's Make Robots!

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Micro servo for robotics?

Have any of you tested this micro servo? It looks like it was designed for robotics, has mounting holes on the sides that usually are called top and bottom and has an opposite hole to the spline. So it should be easy to mount it on brackets and build a biped or an arm... Any thoughts?

http://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewitem.asp?idproduct=7026

microcontroller choice

i have  a problem: i only have on uc, an arduino, and have to build a tx unit with some cheap ebay radio modules. does anyone have any suggestions as to a small microcontroller for this unit. it only needs 2 or 3 channels.

 

Price: $15 USD

 Collected by one member
his  is a non-contact distance measurement module, which is also compatible with electronic brick. It’s designed for easy modular project usage with industrial … Read more

Figuring out what to salvage

So I've got several computer parts lying around and while I was replacing a button in one of my mouses with one from another mouse that was broken I was thinking to myself what could I salvage to be used again?

So how do I know what parts are goodies to salvage and what I should throw in the recycling bin for computers(once I find where to recycle computer parts).

Battery Backup 12v

Hello, I wanted to add a battery backup to a Picaxe circuit so when the AC main fails the power will switch from the AC-DC transformer to a 12v battery which is then lowered to 4.5v to power the PICAXE board.

after some research I found this circuit which seems pretty simple and I wanted to know if you people think its good or will I have fried PICAXE for dinner.

Thanks in advance!  :D

Arduino IDE - what's wrong with versions 0019 onward?

Ever since the release of the new Arduino PCB's there have been at the time I wrote this 4 new versions of the IDE. As far as I can tell none of them work very well. All of my code is written on version 0018 and works fine. Open the same program in later versions such as version 0022 and you get an error when verifying the code.

Here is an example.

Multimeter (how much should I spend)

When it comes to small electronics (like the ones presented here) what should I be looking to spend for a digital multimeter?

Does brand matter? ...Also some of them have ranges? Im not sure I understand what that means. like a 15 range......39 range etc...?

What range should I look for minimum?

 

thanks

Connecting Multiple Microcontrollers

I was wondering if it would be possibly to connect multiple microcontroller IC's by there I/O ports?

Arduino code question and problem.

Can anyone help me to take a look of the code following? CODE 1 works fine to have motor runs forward and backward:

OscarMobile

Just a blog for the OscarMobile build.

When Oddbot left Australia for his robot building job in China, I was lucky enough to score his collection that he couldn't take along with him. Included in this collection was the makings of a kickarse robot, named boozebot. Now after a couple of years, my wife and I have a son, and in a couple of years he's going to need a way to get around (walkings OK and all, but not much fun). So I'm using the base of OB's robot to make the OscarMobile:

 

POV Via Dog

 

If you don't think this is wonderful, you should be slapped.

POV via dog.

 

I was tinkering with some parts and I said to myself... "thats enough to build a very small bot" and Uno-Bot1 was born! The heart is the Uno (Arduino) and takes … Read more
Blinks in different programable patterns
My first step to robotics.... an 3x3x3 cube Read more

Basic I2C HD44780 LCD/Keypad Backpack

 

Practical Maker's I2C HD44780 LCD/Keypad Backpack is a basic, inexpensive little LCD backpack that is unique in that it combines a standard 4x3 keypad input with a standard  HD44780 LCD.  It has all of the necessary housekeeping functions like set cursor, cursor left, cursor right and backspace as well as basic single digit key press input /recognition.  All on a single I2C address using the normal Arduino Wire library.