Let's Make Robots!

Stepstick A4988 issue

Recently I came across the following odd observation with a Allergo A4988 based stepstick stepper motor driver. I hope others will redo my experiment and tell if they see the same.

Those who doesn't know the stepstick can have a look here: https://www.pololu.com/product/1182 Of course mine are cheap clones I got from ebay, but they should work the same.

Earthquake in Nepal - Quick Update

Hello LMRians, 

Long time no see. For those of you who might not have been informed, Nepal was struck by a massive eathquakeThank you all for the wishes during these dire times. I am safe with my family. So are my friends.

first robot

hi guys i posted about the james robot which i am not having any luck with. I am wondering if you could suggest a robot i could build that has easy instructions so i can at least build somethibg and heal my ego. i only have one micro servo a ping sensor and two dc motors. and arduino uno


James robot driving me crazy

hey guys i am seriously losing my mind. I am very eager to leanr and improve. I seen this project and i really wanted to build it. Its been like two months and i still am.having issues.

Support PopPet


Looks like dx, banggood and tindie all pulled this from their 'shelves'. Banggood wants to know who can supply PopPet. I'm passing them CP's way.

I'm scrubbing this post to avoid giving anyone bad names at this point. Thanks everyone.

Hello Guys & Gals,

I am posting this so that fellow LMR members know what is going on, and send an E-mail to ____ in support of PopPet.

Kickstarter 3D Printers

Hello bot brothers and sisters,

I strangly ran into some extra money not needed by our daily expenses.  I'm thinking of investing it in a second printer; a printer from Kickstarter.  I was curious of what some of our citizens thought of these two:

Cannot get the motors to work for this robot

hey guys. I am not getting any movement or anything from the two dc motors. I am using a l239d driver 

here is the code and also a attachment of the wiring.Thanks I hope someone can help me

#include <Servo.h>

#include <NewPing.h>


//Below are the symbolic constants. Instead of having to type in a non-sensical pin number each time we want to do something we can write an easy to understand name which represents the pin, the compiler will then replace the names with the numbers

#define LeftMotorForward 8

battery case question

hey guys i salvaged this outta a toy wondering if i connected it wrong.

can you take alook at the pics and offer some insight. thanks

T'REX robot controller


The T'REX robot controller makes controlling robots easy!

The Arduino compatible controller comes pre-programmed with sample code that lets you control it with a supplied Android app, Radio Control or with an external controller via I²C.