Let's Make Robots!

Device signature 0x000000 while burning bootloader

Hi LMR,

So I bought 7 Atmega328's and burned bootloader's into 5 of them.However for 2 of them I get the following error:

avrdude: Device signature = 0x000000
avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check.

I'm using Arduino Duemilanove as ISP and got the com settings,board selection and programmer settings correct.

Avoids obstacles primarily but You'll have to watch the video to find out more
Using a
Continuing on with the robot revolution here on LMR, this here was my entry into the coasterbot competiton.As you can see.... Hey wait! What's going on?! Help! … Read more
Recreates some nostalgia before you play that GTA5 thingie
Update 1: I had refrained myself for almost a fortnight now - not to post this video. In exchange for a better quality video in daylight but simply don't seem to … Read more

Idea for shift register circuits?

So, I've recently mastered the use of shift registers and have a handful of them laying around.(74HC595's)

Any project Idea about what I might build with them?(possibly something out of track)?

What I mean by this is not knight riders or led cube circuits, rather some whacky ideas - even abstracts will do.

Possibly some fancy circuit you have in mind?

I am not asking for schematics, just running low on inspiration..Any ideas??

Oh and I don't mind using my arduino along with it(As it is what I have!)

Heya fellas, Found out about this electronic circuit design contest today. Contest is open to all homo-sapiens on earth and has no entry fee for individuals ! Just … Read more

How did Coasterbot Contest turn out for you?

Hi LMR,

Just curious to know how many of you entered and actually submiitted a bot for coasterbot contest.I know I did and am inquisitive to hear from the community.

P.S.Did any of you guys turn out lucky?

Filling an integer array with unique random values

As the title suggests, I want to fill an integer array (int a[8]) with unique values from 0-7 during each iteration of loop fuction in Arduino.I read around the net that the most sane idea I found involved filling array with these values(0-7)sequentially and then swapping these values a random number of times.How do I code this mechanism in arduino?

Introduction to GR Sakura - Development board

Sakura? What's that ?

A royal sake brand ?Premium car Polish?(Sorry Oddbot ...had to put that in...)

A cherry blossom tree?(Well it means that literally!)

Simply put I guess you've never heard of it.But now you Are reading about it and if you're reading ..You'll soon Know about it.(Well that's rather my intention anyways).So here goes... the first introduction to GR Sakura Development Board here on LMR.

First lets start with a nerdy introduction...

How to use Arduino interrupt in GR Sakura?

Hi,

I successfully ran a code snippet on Arduino . The arduino code uses timer 1 for interrupt and looks like this...

Best way to remove hot glue?

Yikes ! It's hapenned and I'm sure it must have happened to you - some time or another.I was just finished hot gluing my 2 servos and front ping sensor- just to find i've glued them the wrong way.(Pulling hairs out of my head right now).Now my acrylic chassis is full of that white,glossy,gluely stuff i'm trying to rip off with my nails(And its not a fast way - also prone to leaving scratches on acrylic).I want it all removed- sans any marks on the acrylic.Is there a easy, fast or effective way?