Let's Make Robots!

Arduino connecting grounds

Hi all,

I have a question here, which is probably simple to some of you, but I'm going to ask it anyway.

When using multiple servos from an Arduino, I use an alternative power, to the Arduino's on board power, however Arduino and servo power all derives from the same battery. I also connect the grounds, from the servos to a ground on the Arduino. I assume this to be correct, as it works and all the information I have viewed supports that.

Arduino motor schield

I bought a new l293d motor shield when I connect it uno board the led of both board are turn off and the pc can't find com3 port.

Is it damaged one?


Can I put an infared range finding syestem and an servo on an rc car and reprogram the microcontroller,so it turns into an  obstacle avoider,sorry for all the stupid things I have been posting (resistor array)



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Machines that make mistakes

Hello ! We are Design students, and are very new at all of this, and we would like to make an object that works with any sort of energy, that should be 'alive'. Our idea is to find a way to make it do mistakes, as humans make mistakes. Does any of you have any suggestions ? Our focus is on simple mistakes or children's mistakes, such as clumsiness, or spilling things, or falling, fearless actions etc. If you have any crazy ideas and tips, it would really really help us ! Thank you so much in advance

Recommendations for power source

Hi all,

It's my first post here so I'm hoping I'm doing this right. I'm currently building a robot on the oh-so-popular Dagu Rover 5 platform (4WD). I don't have much mounted right now. One Arduino Uno, with an OSEPP motor shield and a servo on which I mounted a PING))) sensor.  

For the moment, I'd just like to get this guy running autonomously to get the experience of an end-to-end project. I'm probably not even going to bother with the encoders just yet. 

2.4 LCD Touch Screen

Hi guys,

I just got a touch screen and I am wondering how to use it

 I have no clue where to begin.

I have an arduino uno r3 and the touch creen. I will include a picture.

I have looked through the examples, but I am still confused.

I would just like to use it for the paint program to start. TO just get it running.

I downloading the libaries but was confused by that as well. The one on lady ada says to open cpp file and change something. Thats where I got confused.


RC car controller

Hi, for a project for school I'm making an RC car,

for the controller I use 2 PS1 joysticks, 1 for the movement and 1 for the camera.

the camera movement is easy but I can't figure out to get the info of 1 joystick to controll the 2 motors.

I'm using flowcode 5.

Can someone help me with this?

Arduino ethernet sheild and arduino due

Hello guys, I've a wiznet w5100 ethernet sheild (http://i.ebayimg.com/00/s/NjAwWDYwMA==/z/XyMAAOSwqu9VHBTB/$_12.JPG) and arduino due, but i don't know how to connect them, can you guys help me with the connections

Ping sensor question

Hey guys, I have a quick question.

My robot Ive built is runninh great with the exception

that it tends to run into walls.

My code states > 40 then do such and such.

Should I increase or decrease. It will drive

into wall. stop then scan then turn around 

and in most case drive into the next wall.