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16051  Using Arduino / Sensors / Re: 433MHz Remote controll on: April 23, 2012, 03:15:31 pm
If you keep the bit rate down below about 2400 bits per second, you can use serial read and write.
Expect some noise.
16052  Using Arduino / Project Guidance / Re: Building a ChronoGraph on: April 23, 2012, 02:40:42 pm
Quote
Using an interrupt since if im not mistaken, thats the fastest sensing capability of the arduino is it not?
Probably not.
Simple direct port read would be quicker.
16053  Using Arduino / Project Guidance / Re: Building a ChronoGraph on: April 23, 2012, 02:23:22 pm
What does the code look like?
Not using digitalRead, I hope?

545kmh-1?
That's quite fast, isn't it?
16054  Using Arduino / Project Guidance / Re: Building a ChronoGraph on: April 23, 2012, 02:13:06 pm
Instinct says your arithmetic is incorrect.
Never was very good with imperial units though.
500 fps sounds quite fast.
16055  Using Arduino / Programming Questions / Re: int to hex on: April 23, 2012, 11:47:13 am
Code:
char nibbleToHex (char nibble)
{
  char n = nibble & 15;
  return (n > 9) ? n - 10 + 'A' : n + '0';
}
16056  Using Arduino / Project Guidance / Re: magnetic coil gun on: April 23, 2012, 09:38:15 am
Quote
you dont understand what im asking
Pretty much, yes.

Like this:
Quote
i know what the oz of the round
and this:
Quote
i have many qutions to the math behind building this 
16057  Using Arduino / Programming Questions / Re: An error is causing my code to work! Bizarre... on: April 23, 2012, 08:00:12 am
I'm with Bubulindo on this; I find it hard to believe that 186 lines is the smallest code which would display this fault.
I'm not sure I care whether that is rude or not.
16058  Using Arduino / Programming Questions / Re: Delay problem on: April 23, 2012, 07:07:46 am
Code:
digitalWrite(inputPin,LOW); //pull-up enable 
...and you don't enable pullups on input pins by writing a LOW.
16059  Using Arduino / Project Guidance / Re: magnetic coil gun on: April 23, 2012, 06:52:08 am
Is there somewhere in the International section that could help you?
Or maybe try Google Translate.
16060  Using Arduino / Project Guidance / Re: Keeping the dog off the couch on: April 23, 2012, 05:37:27 am
Quote
Whats an easy way to generate 20khz to 40khz sound waves with an arduino?
A 555 and a Murata ultrasonic transmitter.
16061  Using Arduino / Project Guidance / Re: Camera Photo Flash to trigger Arduino on: April 23, 2012, 03:32:55 am
The extreme left hand side of this:
http://www.diyelectronicsprojects.com/2011/06/slave-flash-with-red-eye-delay.html
would be a start
16062  Using Arduino / Project Guidance / Re: Suggest a cheap motion sensor on: April 23, 2012, 01:40:45 am
Correct
16063  Using Arduino / Programming Questions / Re: Emergency Assistance with Sketch on: April 22, 2012, 03:55:51 pm
I'm still not sure what you're asking, but all the loops could go inside the conditional.

No, you can't have concurrency.
16064  Using Arduino / Programming Questions / Re: Assistance with Sketch on: April 22, 2012, 03:41:29 pm
Which loop - there are several?
16065  Using Arduino / Installation & Troubleshooting / MOVED: multiple shields on: April 22, 2012, 03:28:33 pm
This topic has been moved to General Electronics.

http://arduino.cc/forum/index.php?topic=102510.0
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