Let's Make Robots!

uno

Race each other around the room
Using a
Hello everyone, I’ve posted a lot on LMR, and I build robots for a living, but this is the first time I’ve built a personal robot that I’m able to tell you … Read more
Plot the Brazil's Flag on the Nokia 5110
Playing with my new toys, a sample of its possibilities. Read more

Connect 2 speakers to arduino uno

Hi everyone,

 

I'm sorry to bother with such a basic problem but I'm trying to connect 2 speakers ( a piezo and a 8 Ohm speaker ) to an arduino uno to play some tones. The fact is I can play tones with only one of them at a time.

 

 As a beginner, I don't know it's my code wich is wrong or the breadboard layout, so I uploaded here both of them hoping that someone can show me the light !

 

THX EVERYONE !

Here is the code:

int speakerPin = 8;

int speakerPin2 = 9;

 

int length = 295; 

How many times , i can upload sketch to a arduino device.? what is differnce between UNO & NANO

How many times , i can upload sketch to a arduino device.? what is differnce between UNO & NANO

motorcontroller board [FIXED]

Hello

I am trying to build a segway, I know how I am going to make it, but I have been struggling to get the motorcontroller to work for days now.

I attached an accelerometer and a motorcontroller to an arduino uno. When I tilt the accelerometer 2 indicatorlights on the motorcontroller change, so this signal must be right. But when I measure the voltage at the motor output I get only 10-60 mV.

I tried using more and using less Volt (5-15 V) on the m.c. board itself. (I attached it to an old model train transformator)

Please Help

 

pushes other bots out of the arena
Using a
Hi everybody, as some people allready know i am new to LMR and robots all together, meaning this is my first robot. It was originally going to be a holiday project … Read more

Issue with Arduino Uno/Motor Shield r3 - Code or faulty power connection or both?

First post and second robot build (first was the Build your first robot from the Popular Mechanics magazine).  I am having an issue and seeing if I can get some assistance.

Rover 5: how to determine direction with a compass (LSM303)

I recently bought a Rover 5 and an Arduino Uno and made my first sketches. My goal is to let the Rover drive standalone in our livingroom, avoiding objects, childrens and pets ;-).

users controlled through Tera Term - Using Bluetooth
Using a
Atom 1.0: http://letsmakerobots.com/node/31322 My previous Arduino project had a controller that was connected to Atom and powered by my laptop.  Parts:  Read more

ADXL345 graphing program in Processing

OK, so I got this nice little sensor, the ADXL345 and I have composed it into a new version of my "shield".

The board with text   The ADXL345 and TB6612FNG PCB

Object avoidance via sonar, scares the cat
Using a
May 5, 2013 update My robot has incrementally improved as I continued to learn what I could do with the arduino.  I followed a lot of your advise and removed all … Read more
Navigates around the room detecting obstacles and avoiding them.
Using a
UPDATE: Project scraped, would need ball berings for this to work correctly since the aluminium is rubbing against each other and making bigger holes and the robot … Read more
follow wall/avoid obstacles
Using a
    Overview We are building this robot with my friend. It is (when finalized) supposed to be able to detect metal objects and interact with them (move them, … Read more

Arduno Home Robot

Hello, I am planning on making a butler bot or home bot what ever you want to call it. It is going to use an arduino for a brain. Anyway I was wondering about what I should make it do so I am asking you to be creative and tell me; If you had your own robot that could do anything what would it do?

Be creative any Idea is appreciated.

.

navigate in various ways, teach me about robotics
Using a
Hi! MAEP 2.0 is the second version of MAEP (please check it out if you haven't already). I won't go into all the details about things that are the same as the … Read more

Need help with a major proble,

Hi, 

I am trying to build a toy car with an arduino. I am using a tamiya twin motor gear box ( as seen on http://www.pololu.com/catalog/product/1680). This is connected to a track set. ( it pretty much looks like this http://www.pololu.com/picture/view/0J2711). I am using the spark fun motor driver: motor driver 1a dual tb6612FNG on

Hellow there LMR i geus i haven't made any robot if i hadn't found this webpage ;) so here i am with my first robot. its a pretty basic idea, but for me ofcource … Read more
Navigates around using the Ping sensor
Using a
Someone mentioned that Jameco needed a robotic mascot. I have always been a tinkerer, especially with radio-controlled electronics and so I volunteered for the … Read more