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1  Forum 2005-2010 (read only) / Troubleshooting / Re: Java exception errors UPDATE on: August 30, 2006, 10:12:49 pm
I've installed the Arduino 0004 IDE on my XP machine with no problem. The USB board talks to the PC just fine. I've updated the Java VM to the latest version and installed the USB driver from the Arduino distribution on both my Win2000 laptop and my XP desk machine. The Laptop with Win2K just won't talk to the Arduino board no matter what I do. The RX/TX lights stay dark and the Java exceptions are all I get.

Anyway, I can work with my XP PC just fine, but I am very curious why my Win2K laptop and the Arduino won't play together. I'll swipe my wife's Win2K Toshiba laptop and try that too just to see what happens.

Any thoughts?
2  Forum 2005-2010 (read only) / Troubleshooting / Java exception errors on: August 30, 2006, 08:46:30 pm
Here's what I'm getting - java.lang.NullPointerException

      at processing.app.RunnerException.massage(RunnerException.java:69)

      at processing.app.RunnerException.<init>(RunnerException.java:39)

      at processing.app.Sizer.computeSize(Sizer.java:73)

      at processing.app.Sketch.size(Sketch.java:1656)

      at processing.app.Sketch.exportApplet(Sketch.java:1748)

      at processing.app.Editor$38.run(Editor.java:1866)

      at java.awt.event.InvocationEvent.dispatch(Unknown Source)

      at java.awt.EventQueue.dispatchEvent(Unknown Source)

      at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

      at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

      at java.awt.EventDispatchThread.run(Unknown Source)


Running Win2000 on an IBM Thinkpad. New USB board from Sparkfun. Com 3/19200 Led on 13 blinks so bootloader is installed, but the sketch never uploads to the board.

Ideas?

Thanks!
3  Forum 2005-2010 (read only) / Syntax & Programs / Re: What Book ┬áto Learn Adruino Language? on: August 29, 2006, 09:21:57 pm
Thats an interesting question. I don't think there is any specific Arduino programming books available. I'm compiling all of the information I can into one printable .pdf so that I can read it while commuting on the train or when I don't have the PC in front of me. When I'm done I'll be happy to share it with anyone. As for a specific book, it's true that Arduino is using a syntax similar to a C-like or Java like language, but the scope of the Arduino command set is very small in comparison and far simpler than either that I think it might be overkill to try to appreciate it from a C or Java book.

The best thing I can suggest is to read all of the example programs on the Arduino site and the language reference and play with the board as much as possible. And ask lots of questions on the forum.

I just got my first Arduino from sparkfun.com here in the states and will start playing with it this weekend, so you've got company. have fun
4  Forum 2005-2010 (read only) / Interfacing / LDmicro on: October 25, 2006, 07:25:40 pm
I'm programming with a ladder-logic environment called LDmicro. It generates native .hex files for the AVR series including the ATmega8. Problem is, I don't know how to upload the .hex files to the Arduino board? Is there a way to do it with the Arduino environment or the AVR Studio?
5  Forum 2005-2010 (read only) / Development / Ideal development kit? on: August 26, 2006, 08:41:26 pm
If I were to build a collection of components for my 'ideal' development kit, what would they be? What values of resistors, capacitors, leds, ICs, etc. would be most usable?
6  Forum 2005-2010 (read only) / Interfacing / Re: controlling a relay on: August 25, 2006, 07:44:54 pm
Moderator: Could we post this circuit somewhere permanent? It could be very handy to have around. smiley-grin
7  Forum 2005-2010 (read only) / Interfacing / Re: How do I know what resistor to use?? on: September 08, 2006, 08:58:46 pm
You can use a standard value thats close to what you need. In this case use a 330 ohm and you'll be fine.
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