Let's Make Robots!

Arduino

Questions about my Arduino Motor Controller

hi guys I have bought an Arduino and the Arduino Motor Shield from adafruit. The tutorial on Ladyada says that I can power a motor which has a capacity up to 36V. So i programmed my arduino to run a motor on M2 and then when I check the voltage supply over there its just 3.17 V. So how do I power a 5V motor. Also the amperage on the pin is only 0.49A whereas Ladyada says that I can power a motor upto 0.6A and 1.2A peak.Is everything correct with my shield. I have also read that I can power it from an external supply-How do I do that? How will it help me?

Thanks in advance.

Navigates by sonar and carries a multimeter around
Using a
This little guy exists as a courtesy. He makes his binary way to the nooks and crannies of the house in case someone there might need to measure a resistor or … Read more

WiFinder Robot

I'm making a WiFinder robot and I am having some trouble with my arduino code. 

I want to be able to set the robot to a wifi network and have it follow the strongest wifi signal. I plan to have edge detection for stairs and distance from wall sensing. I am having trouble finding the code to be able to get the WiFly to send its signal strength to the arduino, and then converting it to an integer. I know that the the wifly will respond to the command "show rssi" with the signal strength. please help

my code follows:

 

/*SETUP

Arduino and Stand Alone Wii IR Sensor

Hey everybody, I am looking for help with this project: http://letsmakerobots.com/node/7752

I need to make a device for a school project that detects IR position for a PC mouse but that incoporates a
microcontroller, so this project seems like a good start.

I have already built the voltage regulating circuit, removed the IR sensor and attached it to the circuit. All
voltages seem to be at desired values.

AGV

Here is my AGV. It drives to GPS waypoints.  It is currently using a Arduino, GPS, and of course a motor controller. The bot itself is a Hummer RC truck from … Read more

Problem with hexapod

Hi, I'm new here and I'm not so used to forums so if I'll make mistakes posting, writing etc please forgive me and help me to find the way! :)

I also have to say that I'm not English so forgive me for my English or if I can't get something!

So... Let's talk about my problem..

This project is my very first robot project. It has a cybot foot base with 2 DC-motors and 1 wheel in front. I use an Arduino processor as his "brain". For now my … Read more
This is not the first robot I have built. I built it one weekend when I was unable to use my computer (so I was bored), and just using parts I had at my … Read more
Hey guys, Figured I'd share some of my more recent work; Dragoon. This is an RX-64 based quadruped robot using an ArbotiX Robocontroller and the new & … Read more
Navigate arround using 2 IR Leds and an IR receptor
Using a
This is PJBot version 3. The brain of this Bug is an Arduino. Now, it only go rolling and  avoiding obstacles that it detects with 2 led's and 1 IR receptor. Read more

Components to put bw 3.3v signal and 5v

I have an Arm based platform with Serial UART interface but in 3.3v level.

I want it to communicate with my Arduino.

I have a 3.3v power source in the Arduino(Dumilinove).

My question is what components to put between the 3.3v platform RX/TX and the Arduino RX/TX ?

“The Crawler” is my first indoor robot with a range sensor. In hindsight I can see that I probably should have gone with motors and wheels, but I wanted to … Read more
Allows to build basic robots with arduino very easily
I wanted a single sided motor shield which would allow me to control a few servos and 2 DC Motors. All this while allowing easy sensor interfacing. The shield had … Read more
Navigate around via ultrasound, detects light sources
Using a
This is my first attempt on building an 'arty' bot. I didn't know before I started, that this would be the most time instensive robot I 've ever build. But I've … Read more
pull things with intelligent traction control
Using a
What will it do? - Try to pull a heavy object for a given time or distance - RC with driving aid (Hybrid) Read more

The perfect recipe

Some say I know all about computers... Some say I love my hardware more than my girlfriend... All i know is that my desk is always filled with laptops with different OSes, wires, bare PCB's, components and an arduino. That sounds like the perfect recipe for a robot!

Simple Audio Preamp

i found an easy to make audio preamp that i intend to use to measure a sound with an ADC input on my arduino. i want my robot to respond to me clapping and start a drumming sequence. I may have to use some aditional circuitry to turn the output to a simple high pulse when the sound goes above a certain level, this way i can use one of the arduino interrupt pins to start the sequence at any time. heres the link:

 http://www.reconnsworld.com/forum/read.php?9,10

here is someone who has used it with an avr chip

giving life to dead rc vehicles

I’ve found this two rc vehicles on a junk, they are in a very bad condition. The big one has the DC motor burned out, I will try to replace it.. brushless motor maybe.

4354576505_339d4cde32.jpg

They both have two different gear mode (hi and low speed), I am wishing to try it out.

4354590289_f76a2175dd.jpg

This is the dead motor..

Manual compile and upload

We decided to get rid of the Arduino IDE for our project, and switch to make/avr-gcc/avrdude. Sure, the IDE is great for beginners and those who write small to medium-small projects, but it's awkward to use with larger projects using lots of files and several people coding at the same time. And the PC our university has provided to us is quite slow so some stuff take way too much time.

The transition wasn't as easy as we had hoped for though, and it took a day to figure everything out. So to hopefully make things smoother for others, here's how we did it.

Serial transmission and when to initialise it

Hello!

 I am trying to figure out how to transmit data from one atmega to another one via IR. Oh btw i am using arduino language.

First thing i though of was setting the serial communication by using serial.begin in the setup function. I tried that and i noticed that the LED connected to the TX pin on the arduino lights up as soon as i give power to the atmega. This is not really what i wanted, cause i'd like to have the LED off when not in use.

Hi guys, this is my current project, i thought the programming would be easy, but since i havent used my arduino for months, it's not going so well, lol. Well … Read more

Peculiar ldr problem...

Hi, well got my robot to follow light, to see if everything was working fine, but the weird thing is, instead of changing direction in real time, it only changes direction when i reset my arduino board, same thing happens if i watch the serial monitor.

 

for example

 

it prints out 500 to the serial monitor

keeps printing 500, even if i change the light source.

At the Eindhoven University of Technology, faculty of Industrial Design, we have created an easy accessible Robot platform to learn embedded and computer … Read more
  My first non-kit robot. Inspired a lot by the "Start here" robot on this site! Read more

simple ardbot - start

 

I've just started on my first proper robot. I had a bunch of parts laying around that I had bought over the last several weeks, and when I was organizing them they sort of logically grouped into a basic robot: