Let's Make Robots!

How far can you get in parts hunt?

Just an hour ago I have disjointed this little peaceful innocent birdy, just for a little switch as I ran out of them and did not want to stop my robot building proccess! I'm a feelingless monster...


The question of the day:

How far did you ever get in robot building fever? What dirty deeds you did and what sacrifices you put on altar of robot building?



(can't find the old spammers thread so i'm opening a new one)

This one's pretty clever... [rik: Fixed by Del]

Whack a mole

I'm requesting ideas on how to create a moving part.


How would I create the same mechanism that the game Whack A Mole would use to RAISE and LOWER the moles.


Any suggestions would be greatly appreciated.


Also, if you know a great website for moving parts in general it would be helpful.


Thank in advanced!


Tamiya Twin gearbox and UDN2993B motordriver

I've got a timaya twin motor gearbox #70097 and a UDN2993B motordriver ic bought on ebay(http://www.allegromicro.com/en/Products/Part_Numbers/Archive/2993.pdf)

Motors and Tracks

For my next project, I want to use actual motors (I have used continous servos to this point). I also want to have tracks instead of wheels for this project. My question is whether or not the motors I want to use will connect to the tracks I want to use. I want to use this Tamiya Track Kit seen here http://www.robotronic.co.nz/images/TAM-008-000.gif and I want to use the Solarbotics motors like seen here http://www.robotshop.us/solarbotics-gm9-gear-motor-9.html .

SparkFun vs SPARC. Trademark infringement or rabid lawyers?

Everyones favourite supplier of robot goodies receives a cease and desist letter from SPARC over trademark infringement. Read the whole thing here.

SPARC really have no idea do they? If you have ever ordered goods from SparkFun before and wouldn`t like to see them forced to change their name by a big company send a quick email to sparcinfo@sparc.org saying what you think of this. Don`t forget, be polite, we are all adults.

Trouble connecting Vcc2 to SN754410

I've tried looking around a bit and expect this to be a fairly basic question, but nonetheless I still can't get it to work. Basically I have an arduino connected to a SN754410 motor driver powering a lego motor. This all works fine until I try to use a second power supply (9V battery in this case) instead of the arduino's 5V output. Here's the current setup:


SN754410 Test LayoutNote that the arduino is running off of USB power.

Hexapod walking algorithm

Hi everyone, I am working on a hexapod, so far I have constructed one leg and now I am working on the programming.

Touch Screens: Suggestions, Recommendation, Opinions wanted

I'm getting into Visual interfacing with my AVR projects and I am selecting a Touch screen to prototype with.

So far I have narrowed it down to 2 different ones that are within my price range.

The [url=http://www.liquidware.com/shop/show/TSL/TouchShield+Slide]TouchShield Slide[/url] , which I could use with an AVR running the Arduino software and bootloader, seems simple to use but whimmpy
- OR -
The [url=http://store.earthlcd.com/ezLCD-103-ezLCD103_2?sc=7&category=297]ezLCD-103[/url] which seems a bit more "robust and powerful" than the other.