Let's Make Robots!

Looking for a next step up after the Arduino Uno

I've run out of pins on my Arduino Uno. Im looking for something that has more I/O pins. More sensors, larger LCD, more useless flashy LEDs, etc. 

Something with more brains would be great as well. Im open to adding a visual LCD screen to a robot. 

I'd rather stick to the Arduino line of products but if anyone can suggest some other type of controller that does what Im looking for I'll be glad to take a look and do some research to see if its right for me. 

Obstacle avoiding arduino robot uno for biginner

#include <Servo.h>
// --------------------------------------------------------------------------- Motors
int motor_left[] = {2, 

T'rex motor controller HELP!!!!

Please help!!!!

My team and I are using the T'rex chassis and motor controller from Dagu. We would like to have the Arduino Due control the motor controller through I2C. However, we have been having problems. If we load the code provided from Dagu for I2C it works for an Arduino Mega but no joy on the Arduino Due. We know there are differences but have been unable to figure out what they are (libaries, pins, etc). I was able to modify the code and it now compiles and loads on the Due, but I am now receiving the following error:

Master Command Data Packet Sent

Adding mini dissipators will improve motor driver performance or life?

I got these cheap motor drivers and they work fine, but get really hot fast, as soon as the wheel is stalled by something.
They are rated for 800mA of current for motor, 2.5v to 9v, but i wonder if adding some small dissipators can help handling more current or improve their efficiency.

Tutorials for kids to use Makeblock Robot Starter Kit -

I recently purchased the Makeblock Robot Starter Kit (bluetooth version). 

 was looking for a project to work on with my 8 year old son since he expressed an interest in robotics.

Is anyone aware of a tutorial that can teach an adult and child who are at the beginner stage how to make the Makeblock Robot starter kit work?

I have seen the the tutorials on how to assemble the robot (tracked and wheeled), but none on how to or what software to install on an iPad/iPhone, how to make them connect, troubleshooting and how to run the robots. 

Build 18 DOF Robot Black Spider Robot

We had built this Spider robot with 18 pcs servo motors and it can "dance "  
and finish push-up under the control of the Servo Motor Controller Robot Contorller.
Here is the video which is full of fun. Listen to the background music.

PayPal problems

Hello everyone,

I had seen some really cool stuff on ebay.com and had decided to purchase it later.

As nearly all the sellers take payments from PayPal, it was the only option to go with.

When i tried to add money in my PayPal account, I came to know that i counld'nt add money in it with my debit card.I don't have a credit card too.What's more ,it asks to link a bank account which my parents find too risky and do not help in it.

How to properly secure aluminium servo horns to Towerpro servos?

Last night I finally put my Chinese bought biped together. Quite an exercise in frustration really, virtually every darn bracket had to be bend to fit. In hindsight I'd better made the brackets myself!


Anyway, the kit came with aluminium servo horns that are slightly too big for my Towerpro 996 servos. (It takes talent, I guess, to make things exactly so that the don't fit perfectly.) The result is of course that I have unacceptable play on the horn, weren't those aluminium horns suppose to be more durable and accurate than the plastic ones?

Buck/boost module for voltage, anything to boost current? charge pump circuit?

Hi There,

I was wondering how charge pump circuits and buck/boost modules work.  I have a buck/boost module i purchased on ebay, and by hooking up a multimeter to the output, I can verify that from 5V in, i can get get more than 5V out.

Does this mean that i can hook up a solar cell to the input, boost it to 30V, and power a lawnmower?  I'm guessing not because even though it is providing a higher voltage, its not boosting current.

So that leads me to wondering if there are similar devices to boost current.  Perhaps something like a step-up transformer?

Need consistent 90 degree turns. HMC5883L and Arduino Mega

I am currently working on a project for school. The idea was to create a robot that could perform pathfinding functions using A*. The path is found using a virtual grid of nodes programmed into the Arduino where "X"s are non-passable objects, "0" as the start, and "1" as the destination.

Not sure how to insert code on this forum. Someone could help me out with that as well...)


HIRING PIC programmer (Assembly and C)


Keypad and LCD Interfacing using assembly.


Does anyone recognize this thing?

Hi there everyone,

I salveged a couple of these from an old Samsung laser printer:

I suppose it's an electromagnet and it should be as easy as supplying the right voltage over both the wires to "turn it on". However I tried up to 18 volts but nothing happened. 

Anybody knows how much volts I should supply? Or is it something completely different?

Here's some more pictures:

Arduino Due shield having longer range than bluetooth

Hello guys I'm working on a project for controlling the speed of DC motor using smartphone. Right now I'm using bluetooth hc-06 but  I want to increase the range What should i use which would have longer range than the bluetooth. I'm using Arduino Due board.

Up to 40% Off on Raspberry Pi & Accessories

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ICStation has uploaded some related items online these days. Please kindly have a check and enjoy the great offer now.

Details: http://www.icstation.com/newsletter/eMarketing/Raspberry_Pi_2015.html

Long Range IR Proximity Sensor

Hello fellow robot enthusiasts, 


I need some help. I would like to build - from scratch - the device listed above. Though I have endeavored to find this information on the infallible database known as "the Internet," my efforts have returned to me fruitless. I ha e found many tutorials on how to build a simple IR range sensor, but these tutorials stop there, and offer no information beneficial to improving the function of the sensor. That being said, I would like to know if someone can walk me through the construction of this circuit. 


Source for Wild Thumper Motors, Parts and Top Plate

Hello, I am wondering if there is a source for the individual components used in the "Wild Thumper" 6wd chassis? I would like to acquire another top plate and possibly some of the other aluminum chassis parts. Another question that I have is about the Motors with built-in shaft encoders for the Wild Thumper-- are these available in the 75:1 gear ratio? Will they fit the Wild Thumper chassis? I don't mind if I have to make something electronically to interface them, but will they fit mechanically? Is there a source for them? Thanks John

Arduino Due and ZS-040 bluetooth module

hello I'm trying to connect ZS 040 bluetooth module with my arduino due, vcc pin is connected to 3.3v and gnd to gnd of arduino now rx and tx pins are connected to tx1 and rx1 of due. I'm using the following code

void setup() {


pinMode(13, OUTPUT);


void loop() {

  if(Serial.available() > 0){

  char inByte = Serial.read();

  switch (inByte) {

case '0':

an update on the BoB/Zowi thing

after some emails back and forth and agreement has been reached im going to change my license to allow them to produce and sell their Zumi varriant of my BoB robot and they have agreed to my requests. all is well and im happy to have this situation taken care of.

Need feedback with the code on a simple bot I'm working on.

This is the code for a basic obstacle avoiding insect bot. I borrowed some code from a book and the part about the newping library, I did it myself. I want it to go back and turn left/right and move forward on detecting an obstacle. Will the following code do that? I edited the code a bit .

Interfacing arduino and l298n to labview

hello, I'm making a project for controlling speed of dc motor using l298n with arduino and labview 2013.