Let's Make Robots!

problem

Problem with connecting the IR sensor

I am trying to connect the IR sensor from the tutorial to the project board. However my wires are messed up. In the picture that comes with the tutorial:

The red wire on the left side of the sensor goes into the outermost pin, the middle black wire goes into the innermost pin and the right white wire goes into the middle.

Troubleshooting 3-d Printer

This blog is a place to collect notes to be worked up into a Tips post for trubleshooting 3-d Printer problyms.

The idea is to list a symptom with a photograph and list sucsful fix actions to try.

 


 

For Example:

Printer: Printerbot LC

Material: ABS

Notes: Extruder temp 230C, Bed temp 110C, Fan on 100%,Polymide (Kapton) on a glass bed 

Problym: Poorly formed vertical edges, Keystoning (wider at the top then the bottom)

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

 

Burnt Project Board / Need help

I recently attempted a go at the "Start Here" and ran into some problems pretty fast, 

as beginners, my freind and I burnt the 4 holes on the board that control the 2 motors, and when i say burnt i mean that the pins dont even solder properly anymore, ontop of that even if u can get it soldered too the board by using alot of solder, the pins just don't work, they have no connection. We know this because we continued on to the build and got to the programming, and the servo works, the distance sensor works, just the wheels dont work.

A Servo Query

Hi LMR's,

I recently bought 6 servos from here: http://robokits.co.in/shop/index.php?main_page=product_info&cPath=2_5&products_id=187 .

It says to be Exact replacement for Futaba S3003 and Hitec HS-311.

In most of the website and the official arduino page I read that u simply can run one from an arduino,but in my case it didn't :-(

3x Ultrasonic sensor

Hi I have problem with reading value from 3 ultrasonic sensor. I use Atmega644P and trig is conected to PD5-PD7, but echo from all sensors conected to PD2. I tried read value and wrote to LCD. When I disconnected all sensors the some values are on LCD, but when I connected all sensors and click to reset the LCD is clear.

Problem with digital input with axe 121 in 28 pin project board

I have connected an AXE121 to the 28 pin project boarrd. The light on the AXE 121 work according to the line but in the digital input there is no input shown.Also the program with inputs doesnt work on the bot.What may be the problem?

infrared sensors

I've got two sets of phototransistors and infrared emitters put together to make two IR distance sensors. They are both connected in the same way, both powered by my Arduino Uno, both with the same resistor, etc. But when I check the values I'm getting from them, one of them ranges from about 980 - 1010, with the higher value closest to the sensor. The other, however, goes from about 350 - 570, with the higher value the furthest from the sensor.

IR RC code problems...

 

 

#include <IRremote.h>

#define m1F 6

#define m1R 7

#define m2F 5

#define m2R 8

 

long F = 1979994096;

long L = 1979994056;

long R = 1979994048;

long B = 1979994076;

long S = 1979994080;

int RECV_PIN = 4;

 

IRrecv irrecv(RECV_PIN);

 

decode_results results;

 

void setup()

{

  pinMode(13, OUTPUT);

  pinMode(m1F, OUTPUT);

  pinMode(m1R, OUTPUT);

  pinMode(m2F, OUTPUT);

My Arduino 2560 Power on, Won't upload

I just bought an Arduino 2560 Board, I was using it with windows 7 and it was working perfectly.

The problem is that now the Arduino is not detected by any of the operative systems, I am currently testing with Mac Snow Leopard, Linux and windows 7. The reset botton is working, and when I plug it to the computer the Power LED turns on......

Any suggestions on how to fix this? 

 

THANKS!

Battery charging

Hello

 

I have this battery:

it has 6V, 1.3Ah... I don't have a charger... on the side says:

 

cycle use charge 7.25 - 7.45V

Trickle charge: 6.8 - 6.9V

and something about 0.4A

 

Optical Encoder giving variety of results

Hello,
I have a QRB 1114 and have done a little experimenting with electrical tape on my wheels.  I "thought" that I had this working before in a different setup, but maybe it was not working "correctly" before.

Problems with I2C -- DISCARDED

I'm trying to control two motors  by means of a joystick. This means I've coupled the potentiometers inside the joystick to my Picaxe 28X1 and my Picaxe 28X1 to two MD03 motor controllers. 

While testing I'm using only one potentiometer and one MD03. The problem is that I cannot get the system to work.

The program I'm using right now is:

i2cslave %10110000, i2cfast,i2cbyte

main:

readadc 0,b0

My mac recognizes the usb cord as a modem, cant connect picaxe.

Hello all. I was wondering if anybody could tell me how i could connect to my robot? I have built everything, and downloaded the axepad for the intel based mac as well as the usb driver, when i restarted my computer and went to my network under system preferences, the computer recognized the usb as some sort of modem

it gave me the following configuration options.

Telephone number:

Account number:

Password:

 

Problem with SparkFun PicAxe USB programmer cable

Ok, got to the point where it's time to start coding and I got power to everything that needed it and started installing the drivers needed for the Picaxe programmer cable. Well to no avail. If anybody has an idea a walkthrough it would be appreciated.

 

Mech 

Ignoble Idiocy

"Those who cannot remember the past are condemned to repeat it." - George Santayana

mistake_0.gif 

Nobody's perfect, least of all me.  Here I intend to record some of my roboting mistakes for my own good.  Perhaps you can learn from my errors, or even contribute your own.

Latest Update: 2010-02-04

what is wrong with my code?!

i dont know what's wrong with my code!

i made a simple code that should make my robot simply avoid walls, stuff etc.

i placed SC-QR-1 (my robot's name) upside-down and pressed [F5] (the "run" shortcut) and watched him move his cute little robot legs..     WTF?

the new code seemed to work untill the walk part was over and he started to turn..    ..left.        and then again left and again and again..    etc.

he is suposed to keep walking!!!

Is My Arduino Dead?

Is my arduino dead.
i have the Arduino deicimela or whatever.
i have my code and when i verify its say "yep she's good mate, upload er".
but when i go to upload er it sits there for ages the IDE freezes and then to me it says "look here mate lets get something right even though i said its all good, im just not in the mood so im not gonna upload it until you make me feel better". however to anyone else it would look like this:

Binary sketch size: 976 bytes (of a 14336 byte maximum)

what is wrong?! ..and what can i do!?

okay..         so i just finished my new robot(8 servo quadropod)and started makeing a test program.   when the test program was done i downloaded it to the picaxe and it worked! then i started to try out use the srf05 to see if it was plugged in the right way! so i made another program and tryed it and that worked too!