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1  Using Arduino / Audio / Re: Strange problems using SD Card and VS1003B based board on: Today at 12:46:21 am
Problems where your hand proximity causes a change are always due to floating inputs. That is inputs that are connected to nothing. Inputs should be high or low not floating. If an input is not used it should be connected to the supply or ground not left floating.
2  Using Arduino / Audio / Re: from SD card to speaker on: Today at 12:41:17 am
What is a high speaker?

You can not use MP3 files on an arduino SD card, you have to have a card or shield that will play MP3 files.
3  Using Arduino / Programming Questions / Re: What is needed for FTDI on: Today at 12:37:57 am
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TX - RX1
RX -TX0
DTR - DTR
Would it not be a good idea to use the same port on transmitt and recieve?

Also check that the TX and RX are both the same way round on both devices. On some devices TX is an input and RX is an output. It depends on how the equipment is classe, as DTE or CTE.
4  Using Arduino / Project Guidance / Re: Couple questions about color sorting on: Today at 12:27:57 am
The servo needs more decoupling than the sensor.

The code is very bad.
You should declair all the variables you want to use outside the ISR as volatile.
You should not use serial print from inside an ISR.
You should disable the interrupts when grabbing a multi byte number outside an ISR that is changed inside one.
5  Using Arduino / General Electronics / Re: can I use duct tape on this project? on: Today at 12:20:04 am
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Actual -duct- tape is aluminum tape, which is conductive.
Only on the outside. Anyway all the duct tape I have used is plastic and the shiny surface is not conductive.

Anyway a much better thing than heat shrink is self alagmating tape.
The problem with heat shrink is that you have to insert the wires before you solder them together. Also it has limited shrink ability.
6  Using Arduino / Motors, Mechanics, and Power / Re: MIDI to Stepper motors on: April 17, 2014, 05:41:30 pm
You will have to give a much better explination about what you want to do and also post some code showing what you have tried.
7  Using Arduino / Motors, Mechanics, and Power / Re: Noob Motor Sheild Question on: April 17, 2014, 05:39:52 pm
Yes any pins not being used by the shield can have wires soldered on them to use them for other things.
8  Using Arduino / Project Guidance / Re: Couple questions about color sorting on: April 17, 2014, 05:34:39 pm
Why on earth are you using interrupts. I can see no reason to do this.

If a motor interferes with other components then you supply needs decoupling like the link I posted earlier.
9  Using Arduino / Project Guidance / Re: OCR Sorting Machine on: April 17, 2014, 05:10:20 pm
You write it. It is software.
Does everything you do have to have been done before?
10  Using Arduino / Project Guidance / Re: OCR Sorting Machine on: April 17, 2014, 05:06:41 pm
Forget character recognition and go for template matching.
Have a template image of each of the sizes, and match the incoming image against them. The closest wins.
11  Using Arduino / Project Guidance / Re: Github question? on: April 17, 2014, 05:03:51 pm
You can't do it n the other arduinos because it's code is in flash based memory and that can't be updated when running except by code in the boot loader partition.
12  Using Arduino / Interfacing w/ Software on the Computer / Re: recommend book for python interfacing with Arduino on: April 17, 2014, 05:00:43 pm
Global variables are bad but you need them in python because you can't have static local variables in the language.
13  Using Arduino / Interfacing w/ Software on the Computer / Re: First processing sketch on: April 17, 2014, 04:58:26 pm
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i ended up thinking that using the Firmata library would be a good option
If you think that turning the arduino into a dumb I/O machine is a good idea then I think you have a lot to learn.

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is there a way NOT to create a new file on each time i run the sketch?
Yes, don't create one.
Code:
// Create the output file
  output = createWriter("potValues.txt");
The comment is the clue.

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Is it possible to do something like?......
Yes, try opening the file for read, then read to the end and then add stuff.
14  Using Arduino / Interfacing w/ Software on the Computer / Re: LABVIEW VISa + ARDUINO on: April 17, 2014, 04:53:50 pm
LabView interfaces to the Arduino through the serial port or serial Vi.

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i want a labview program .. with three graph recorders or gauge .
I would have thought that was a LabView problem not an arduino one.
15  Using Arduino / Installation & Troubleshooting / Re: Toasted Macbook, Arduino untouched? How is this possible? on: April 17, 2014, 04:51:02 pm
Don't know.
However, the first rule of hardware is never work on any circuit that is powered up.
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