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12811  Using Arduino / Project Guidance / Re: Changing the I2C adress of arduino on: September 14, 2012, 04:51:46 am
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So i want to know it their is a funtion or sketch in arduino 1.0 IDE that can give me the access to the TWAR register of Atmega328.
See reply #5.
You have the source of the Wire library, why not look at it?

When in doubt, there's always the reference
12812  Using Arduino / Project Guidance / Re: communication between ARDUINO and PC using SPI on: September 14, 2012, 04:46:29 am
Someone else with a similar problem - maybe you should confer.
12813  Using Arduino / Project Guidance / Re: Changing the I2C adress of arduino on: September 14, 2012, 04:43:22 am
Are you using the Wire library? (which is why I asked for context in reply #1)
You set the address in the "begin" method.

(is there something wrong with your punctuation keys?)
12814  Using Arduino / Project Guidance / Re: Changing the I2C adress of arduino on: September 14, 2012, 04:29:32 am
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Is their any register
You need to look at the TWAR in the processor datasheet.
12815  Using Arduino / Project Guidance / Re: ideas for creating linear movement/ general suggestions for approach please on: September 14, 2012, 04:25:31 am
You could maybe press the plunger with a simple cam
12816  Using Arduino / Programming Questions / MOVED: Led rgb & arduino on: September 14, 2012, 03:59:38 am
This topic has been moved to LEDs and Multiplexing.

http://arduino.cc/forum/index.php?topic=122702.0
12817  Using Arduino / Project Guidance / Re: Using Arduino as the basis for a bat detector on: September 14, 2012, 03:29:48 am
My immediate thought is that the Arduino is way underpowered for any sort of analysis, and a DSP architecture would be better.
The ADC is too slow to sample the sound directly, so you' have to divide the frequency down first.
Recording too would probably hit the buffers of how fast you could write to external media.

You might use it to analyse repetition rates, but that would be about the limit of it.
12818  Topics / Science and Measurement / Re: Measuring the velocity on: September 14, 2012, 03:19:36 am
I certainly wouldn't use a photoresistor (LDR) for high speed stuff, but as far as I know, commercial ballistic chronographs use photodiodes.
12819  Using Arduino / Project Guidance / Re: Changing the I2C adress of arduino on: September 14, 2012, 02:58:43 am
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.Currently it is 127(0x3F)
sp. "127 (0x7F)"

Do you have any context for this question?
12820  Topics / Science and Measurement / Re: Measuring the velocity on: September 14, 2012, 02:00:29 am
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However after my research on the web, I have discovered that using this method will be too slow or inaccurate
[citation required]
12821  Using Arduino / Installation & Troubleshooting / MOVED: IOREF? on: September 14, 2012, 01:35:53 am
This topic has been moved to Microcontrollers.

http://arduino.cc/forum/index.php?topic=122743.0
12822  Using Arduino / Project Guidance / Re: LDR circuit on: September 14, 2012, 01:33:25 am
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If the sensovalue is <150,
That's not what the code says.

Why don't you post your code and the serial output?
12823  Using Arduino / Programming Questions / Re: variable changing value....can't figure out why on: September 14, 2012, 01:22:46 am
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At the very beginning of the code, there is a "int error;
No, there isn't.  (hint)

(BTW "result" != "error")
12824  Using Arduino / Storage / Re: Create database, save records, read, etc on: September 14, 2012, 12:26:51 am
Put it in PROGMEM.
12825  Using Arduino / Programming Questions / Re: Bitshift question. on: September 13, 2012, 04:46:56 pm
there's a very important 'f' missing from your subject.
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