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1  Community / Products and Services / New product - Watchdog Timer Module for Arduino on: September 17, 2014, 11:27:51 pm
We're proud to announce a new module - our Watchdog Timer Module for Arduino (etc). It's a neat module that can be used to check for a "heartbeat" from your Arduino every one or five minutes, and if not found it will reset the Arduino. It's easy to use and for more information including a tutorial please visit:
2  Using Arduino / Project Guidance / Re: Clock on: September 03, 2014, 06:11:40 pm
This will do:
// Project 58 - Creating a Simple Digital Clock
#include "Wire.h"
#define DS3232_I2C_ADDRESS 0x68
#include <LiquidCrystal.h>
LiquidCrystal lcd( 8, 9, 4, 5, 6, 7 );
// Convert normal decimal numbers to binary coded decimal
byte decToBcd(byte val)
  return( (val/10*16) + (val%10) );
// Convert binary coded decimal to normal decimal numbers
byte bcdToDec(byte val)
  return( (val/16*10) + (val%16) );
void setup()
  lcd.begin(16, 2);
  // set the initial time here:
  // DS3232 seconds, minutes, hours, day, date, month, year
  //setDS3232time(0, 27, 0, 5, 15, 11, 12);
void setDS3232time(byte second, byte minute, byte hour, byte dayOfWeek, byte
dayOfMonth, byte month, byte year)
  // sets time and date data to DS3232
  Wire.write(0); // set next input to start at the seconds register
  Wire.write(decToBcd(second)); // set seconds
  Wire.write(decToBcd(minute)); // set minutes
  Wire.write(decToBcd(hour)); // set hours
  Wire.write(decToBcd(dayOfWeek)); // set day of week (1=Sunday, 7=Saturday)
  Wire.write(decToBcd(dayOfMonth)); // set date (1 to 31)
  Wire.write(decToBcd(month)); // set month
  Wire.write(decToBcd(year)); // set year (0 to 99)
void readDS3232time(byte *second,
byte *minute,
byte *hour,
byte *dayOfWeek,
byte *dayOfMonth,
byte *month,
byte *year)
  Wire.write(0); // set DS3232 register pointer to 00h
  Wire.requestFrom(DS3232_I2C_ADDRESS, 7);
  // request seven bytes of data from DS3232 starting from register 00h
  *second = bcdToDec( & 0x7f);
  *minute = bcdToDec(;
  *hour = bcdToDec( & 0x3f);
  *dayOfWeek = bcdToDec(;
  *dayOfMonth = bcdToDec(;
  *month = bcdToDec(;
  *year = bcdToDec(;
void displayTime()
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
  // retrieve data from DS3232
  readDS3232time(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month,
  // send the data to the LCD shield
  lcd.print(hour, DEC);
  if (minute<10)
  lcd.print(minute, DEC);
  if (second<10)
  lcd.print(second, DEC);
  case 1:
  case 2:
  case 3:
  case 4:
  case 5:
  case 6:
  case 7:
  lcd.print(" ");
  lcd.print(dayOfMonth, DEC);
  lcd.print(month, DEC);
  lcd.print(year, DEC);
void loop()
  displayTime(); // display the real-time clock time on the LCD,
  delay(1000); // every second

3  Using Arduino / Installation & Troubleshooting / Re: Arduino Hbridge not working on: August 24, 2014, 01:11:13 am
just pumped it upto 12volts, working fine smiley


Ah good news. For reference, you can isolate by the motor supply voltage from the Ardiuno by removing the jumper shunt from the Arduino Vin with the "bridge Vin to motor power" jumper on the shield. However any decent board should handle 12V without any issues.
4  Using Arduino / Installation & Troubleshooting / Re: Arduino Hbridge not working on: August 23, 2014, 09:40:59 pm
Is your external power between 8 and 40V and are your motors rated between 8 and 40 V?
5  Using Arduino / Installation & Troubleshooting / Re: Arduino Hbridge not working on: August 23, 2014, 07:32:13 am
Are you using the Freetronics HBRIDGE: motor shield for Arduino? If so, does your motor voltage fall between 8 and 40 V?
6  Using Arduino / Displays / Re: query on: August 18, 2014, 10:51:47 pm
i want DMD connector alone from wher can i get it and i am from india

They are not sold separately, one is included with each new DMD.
7  Community / Products and Services / Re: NEW PRODUCT - The EtherDue on: August 04, 2014, 07:12:08 pm
Does anyone know of a UK (or maybe EU) supplier for EtherDue?

Coolcomponents don't seem to stock it, and appears to be out of stock.

They should be able to order it for you, or - or order it directly from
8  Using Arduino / Installation & Troubleshooting / Re: Can't update driver for Elever R3 on my Windows 7 Home Premium OS on: July 13, 2014, 05:22:06 pm
Thanks John from Freetronics. Got the freetronics drivers downloaded after I read the paper that came with it. Feeling like a bit of a goose. All is good. great product
Good news, thanks for letting us know.
9  Using Arduino / Installation & Troubleshooting / Re: Can't update driver for Elever R3 on my Windows 7 Home Premium OS on: July 12, 2014, 09:54:58 pm
My arduino is an Eleven R3 with a ATMEGA328P - PU
it is by a company called freetronics and is described as UNO compatible.

I first installed the Arduino IDE 1.0.5 version and extracted it all and then the 1.5.7 BETA was suggested and I tried that too after uninstalling the first.

My problem lies in the fact that I go into control panel>device manager to find the arduino, but there is no sign of it in PORTS and is labelled as unknown device in other devices. I try to upload drivers, but windows always tells me i am unable to install unknown device. I have also downloaded the FTDI stuff, but that hasn't helped.

After a few days trawling the forum I am unable to find anything that solved my problem and I fell I have exhausted all my options. (i assume others have had this problem, however I may have been googling the wrong terms)

Thankyou in advance for your help.

This is John from Freetronics.
Our digitally-signed USB driver and installation instructions are available from here:
If you have any more problems or questions please email

10  Using Arduino / Motors, Mechanics, and Power / Re: DC motor test works with Arduino Uno but not Mega 2560 on: July 06, 2014, 02:10:41 am
Not exactly a motor shield, however you can control motors using PWM.
The documentation for the shield is terrible, however based on what is provided we'll assume that the six outputs are controlled by Mega PWM pins. So you would use analogWrite() for pins 3~8.  Again, the pin numbers could be different so experiment and see what happens.
For more on analogWrite see:

Please use our USB drivers -

Next time you shop for an Arduino shield, ensure the supplier has made the effort to document the shield for end users before purchasing.
11  Using Arduino / Motors, Mechanics, and Power / Re: DC motor test works with Arduino Uno but not Mega 2560 on: July 05, 2014, 09:35:15 pm
Hi this is John from Freetronics.
Please give us a link to the product page for the motor shield (that has the technical details such as schematic) you are attempting to use with your EtherMega and we can help you with it.
12  Using Arduino / Motors, Mechanics, and Power / Re: DC motor test works with Arduino Uno but not Mega 2560 on: July 05, 2014, 03:31:10 am
Hey guys,

I was testing out my Arduino hardware using this link:

I can get the motor to move when using a Freetronics Eleven controller board (based on Arduino Uno controller) and the two channel Arduino motor shield. I copied the Void setup code into Arduino 1.0.5-r2 and the motor moved as expected.

However, when I try the same code with a Freetronics EtherMega controller board (based on Arduino Mega 2560 controller) and an Arduino 6 channel motor shield (, I get no movement on the motor at all. The RX and TX lights on the EtherMega controller hardly flash so I assume the Void setup code is the problem.

Is there a Void Setup code that I can try that is appropriate for the EtherMega setup? I have Googled it thoroughly and found nothing.

Also, when I plugged the DC motor into the shield, I made sure to put it into Channel A to match the Void Setup code.

Any ideas?

First of all, try some code for Arduino Uno from your motor shield supplier.
Secondly, how are you powering the lot? And can your provide a link to the technical details of your motor shield?
13  Using Arduino / Project Guidance / Re: Is my project to make a door unlock-able by bluetooth doable? on: June 02, 2014, 03:24:59 am
I want to be able to do the same thing but using this  
I'm just wondering if it's possible and how it would work considering i dont think you can password a bletooth connection can you?

The short answer is yes, you could do this this with Arduino, and yes, it is actually routine to make a bluetooth pairing conditional on a password. This all presupposes this is a worthwhile idea for a project, which it probably isn't.  For starters, you probably have better things to do with your phone and you might have better things to do with the Arduino as well. I think you can do this sort of thing without an Arduino.

If you are serious about being really cool, you might have a talk to Jonathon Oxner at Freetronics.  I understand he has a microchip embedded in his wrist for this sort of thing, and it controls the lighting and security as well.  I imagine he can do this while talking on the phone. I bet Spiderman never thought of that.

Check out Jon's home automation site - for more on the RFID implant and home automation with Arduino and compatible equipment.
14  Community / Products and Services / Re: NEW PRODUCT - The EtherDue on: May 11, 2014, 06:20:35 pm
We've stayed true to the Due design so the EtherDue has the 1k5 pull-ups, however considering options for the next revision.
15  Community / Products and Services / NEW PRODUCT - The EtherDue on: May 01, 2014, 03:36:40 am
We've just launched our latest Ethernet-enabled Arduino Due-compatible board - the EtherDue smiley
For more information please visit:
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