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466  Using Arduino / Project Guidance / Re: Minecraft Server On/Off Button on: September 08, 2013, 09:38:33 am
I do almost exactly the same with a Leonardo - the leo has an ethernet shield, but it just types keystrokes to windows as a 'hid' keyboard.
467  Using Arduino / Project Guidance / Re: Challenges of Going Commercial after Starting on Arduino on: September 07, 2013, 04:12:31 am
I design my prototype using arduino, shields, etc. Test it, design the 'production' board in eagle(I have a licence) or any PCB CAD Package , and get a pre-production (usually turn into the final design) using the reference designs for reference (Arduino & Ethernet shield for example) - price for boards + parts + assembly (remember to factor your time in) is your cost. It's up to you to take it from there.
468  Using Arduino / Project Guidance / Re: Challenges of Going Commercial after Starting on Arduino on: September 06, 2013, 03:51:59 pm
I've designed & had manufactured a few boards developed using the Arduino base (Using atmega 328 & 2560 chips) - These are currently working away in various locations throughout Europe - I built a few boards by hand, and the rest by other companies with 'real' manufacturing abilities. It's a big. but quite easy step to do, and providing you have FULLY tested your design, you should not have any major issues. That said, the biggest issue was finding an enclosure for the projects.
469  Using Arduino / Project Guidance / Re: Arduino MEGA problem with TWI on: September 05, 2013, 01:11:56 pm
Code & Schematic??
470  Using Arduino / Programming Questions / Re: whats wrong in my code ( RFID READING) on: August 30, 2013, 05:25:04 am
I have used this code as a base for a similar system :

Quote
// Interfacing the 125Khz RFID module - UART(PPRFR101A1M-X)
// Created 20 May 2011 www.proto-pic.co.uk

#include <SoftwareSerial.h>

String msg;
char inChar;
int x;
SoftwareSerial Rfid(2, 3);    // RX as pin 2

void setup()
{
 Serial.begin(115200);
 Rfid.begin(9600);
}

void loop()

{
  
while (inChar = Rfid.read() != 2)    // Wait for start byte from Rfid reader when tag is swiped
{
}

msg = "";
for (x = 0; x < 12; x++)
{
    delay(10); 
    inChar = Rfid.read();
    msg += inChar;
}

Serial.print(msg);    // Sends the ID plus the checksum byte (12 bytes)
}


471  Using Arduino / Programming Questions / Re: Communication between ATtiny85 and ATMEGA328 on: August 29, 2013, 02:40:01 pm
This is the modified version :

Code:
#include <Wire.h>
    int CVin = A1;
    int CV = 0;
    int CVout = 0;

void setup()
  {
    Wire.begin();
    Serial.begin(9600);

  }
void loop()
  {
    cvRead();
    dataTransport();
  }
void cvRead()
  {
    CV = analogRead(CVin);   // read the voltage level at analog pin 1
    CVout = map(CV, 0, 1023, 0, 127); // map the reading to a value of 0-127
  }
void dataTransport()
  {
    Wire.beginTransmission(4);
    Wire.write(CVout);
    Wire.endTransmission();
  }
472  Using Arduino / Programming Questions / Re: Communication between ATtiny85 and ATMEGA328 on: August 29, 2013, 02:37:56 pm
Define them before SETUP() - they are only LOCAL when defined in SETUP()
473  Using Arduino / Programming Questions / Re: Communication between ATtiny85 and ATMEGA328 on: August 29, 2013, 11:53:41 am
have a look at the data sheet - it has a I2c (TWI) interface - use that with the wire library. ;-)
474  Using Arduino / Programming Questions / Re: Simple problem with OR statement on: August 29, 2013, 11:37:29 am
if (now.day()==1 || 21)  <    if (now.day()==1 || now.day()==21)


try that

*Edited for OFT Error - Operator Finger Trouble
475  Using Arduino / Programming Questions / Re: Where are the Arduino libraries? on: August 28, 2013, 07:28:52 am
Wolve - I recommend that you re-read the example given - its says if you had a library called .....
it's using names that don't exist as it's only an example.
476  Using Arduino / General Electronics / Re: Black Single Row header connectors on: August 27, 2013, 11:16:27 am
See here : http://proto-pic.co.uk/6-pin-stackable-header-for-arduino/
477  Using Arduino / General Electronics / Re: De-Soldering RN42 on: August 26, 2013, 12:16:39 pm
Or stick them under a grill
478  Using Arduino / Programming Questions / Re: trouble with rfid card without datasheet on: August 26, 2013, 07:20:20 am
RFID Cards have a 10 digit serial number and a 2 digit checksum - you calculate the checksum by XORing the 5 pairs of hex values together. It's a good way to make sure the card has been read properly - read the 12 characters, strip off the last 2 (or read 6 sets of 2 characters), XOR the serial number (in sets of 2 HEX values) compare the result to the last 2 character HEX value, if its correct, then use the values to compare against your 'Keys', if not, reject the card.
479  Using Arduino / General Electronics / Re: Can I use 4.7K pullup with DHT22 sensor? on: August 07, 2013, 03:33:04 pm
The device is an 'open drain' device - it can only pull a line low, so you need to supply the HIGH for it to pull down.
480  Using Arduino / Microcontrollers / Re: Arduino ISP help on: April 25, 2013, 04:45:00 pm
Hi - Don't click display window - it's a bug
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