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46  Using Arduino / Programming Questions / Re: Time and TimeAlarms Libraries – Ask here for help or suggestions on: September 06, 2014, 12:03:22 pm
Serial.write(MESSAGE,BYTE) and this don't work on Arduino 1.0. ...
That is not a bug.  it is a deliberate, documented change introduced with release 1.0
47  Using Arduino / Programming Questions / Re: error in displaying file names from sd card on: September 06, 2014, 02:36:34 am
i cant understand where i made mistakes.
Nor can we because you did not post your program so that we could see we could see what you are doing.
48  Using Arduino / Programming Questions / Re: LiquidCrystal and U8GLIB on: September 05, 2014, 04:20:22 pm
Pins 4 and 5 are being used by the LCD and are also set to INPUT each time through loop()
What is that all about ?
49  Using Arduino / Programming Questions / Re: rfid bus is it possible on: September 05, 2014, 04:08:15 pm
I don't know if it is possible to retrieve the data but I want to know what happens when you connect something to the 2 wires labelled "Sabotage" !
50  Using Arduino / Programming Questions / Re: LiquidCrystal and U8GLIB on: September 05, 2014, 01:49:32 pm
both lines.
You are only printing to one line

lcd.setCursor(0, 0); // top left
lcd.setCursor(9, 0); // top left
lcd.setCursor(14, 0); // top left
They can't all be top left can they ?

I await your full code with interest.
51  Using Arduino / Programming Questions / Re: PID library - How to tell when compute executes on: September 04, 2014, 04:51:42 pm
What do you see if you capture PidSpeed.Compute() in a variable and print it ?  Is it always false ?

Can you please post all of your program so that we can see the context and how/where variables are declared and initialised ?
52  Using Arduino / Programming Questions / Re: setting an input signal as timer on: September 04, 2014, 12:34:56 pm
why specifically pin2 ?
Because that is the pin used by interrupt 0 on a Uno and, incidentally on a Mega 2560, so the program should work for you.

53  Using Arduino / Programming Questions / Re: Arduino mega at2560 overclock 20mhz on: September 04, 2014, 10:16:26 am
What is it that made you think you needed to overclock the Mega ?
54  Using Arduino / Programming Questions / Re: Arduino mega at2560 overclock 20mhz on: September 04, 2014, 09:14:23 am
So this is why I need more "power"!
Are you sure that your code is optimised and that you cannot use the Arduino at its native speed ?
55  Using Arduino / Programming Questions / Re: Help to get a MQ-2 Programming Code on: September 04, 2014, 09:09:33 am
This may be a radical idea, but what have you got to lose ?
Try searching this forum for MQ-2
56  Using Arduino / Programming Questions / Re: speed of transistor on: September 04, 2014, 07:13:07 am
Post your program so that we can see what you are doing and how.
57  Using Arduino / Programming Questions / Re: puseIn / digitalWrite() question on: September 04, 2014, 02:19:11 am
I have ordered another receiver that has SBUS capabilities, and that may be the answer
I predict that it will be the source of more problems rather than providing the answer.

When I needed to extend the pulse width of an RC channel beyond what the transmitter setup provided I used this
  yawDuration = pulseIn(yawInPin, HIGH);
  yawDuration = map(yawDuration, 1000, 1800, 980, 2020);
  digitalWrite(yawOutPin, HIGH);
  digitalWrite(yawOutPin, LOW); 
58  Using Arduino / Programming Questions / Re: Problem Programming Servo on: September 04, 2014, 02:08:36 am
As has been pointed out you have no control over the position of a continuous rotation servo.  It is in fact not a servo at all but a geared motor with electronic speed control.

Bearing that in mind this code
  for(pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees
  {                                  // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(7000);                       // waits 15ms for the servo to reach the position
will not do what the comments say.  It will increase the speed of the servo rotating in one direction in 180 discrete steps, each of which will take 7 seconds, which will take a total of 21 minutes.

By the way, the code as posted does not compile.
59  Using Arduino / Programming Questions / Re: Arduino Time library and Time alarm on: September 03, 2014, 06:23:35 am
Do you really think it likely that providing 3 volts to an input that expects between 3.3 and 12 volts is going to work ?  Why not try it and see ?  Even if it works will it be reliable working outside of the specified voltage range ?

Exactly what coin cell are you considering using and how long do you expect the Arduino to run on it ?
60  Using Arduino / Programming Questions / Re: Comparing Values on: September 02, 2014, 09:21:11 am
Hmmm.., indeed, but I won't commit the sin of revising my original post and making a nonsense of your comment
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