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46  Using Arduino / Project Guidance / Re: HELP!! Controlling a 5 plate Hotpress machine on: February 07, 2013, 06:29:31 am
You need to figure /decide out how you will (can):

Control temperature
Read temperature
Control the hydraulics
Input time / temp parameters

before we can give any advice.

47  Using Arduino / Project Guidance / Re: 6 way rotary switch connected to arduino uno to one analogic input on: February 06, 2013, 04:31:56 pm
Try to check this:

http://jespereklund.blogspot.dk/2011/10/rotary-selector-switch-for-arduino.html

Please note that there is an error in his code, you can se my correction to the code in danish but you will get it.
48  Using Arduino / Motors, Mechanics, and Power / Re: Can I power a Motor directly from Arduino Board? on: February 04, 2013, 04:20:09 pm
To give advice on transistors we need to know more about your motors, voltage / current draw.

If the motors are not too big, a common transistor to drive it could be the TIP120, you would also need a diode and a resistor for each motor.
49  Using Arduino / Programming Questions / Re: Problem using Google Docs server? on: February 02, 2013, 11:16:36 am
Do they use the same ethernet shield as yours?
50  Using Arduino / Programming Questions / Re: Problem using Google Docs server? on: February 02, 2013, 02:10:08 am
Are you sure your arduinos ethernet shield and the associated protocol stack can make HTTPS connections ?

As far a i know that i not possible.

Mikael
51  Using Arduino / Project Guidance / Re: Mains AC voltage logging on: January 31, 2013, 07:00:33 am
How about using one of the digital voltmeters that comes with a built in serial port for logging ?

That should work - i guess

Might cost a little too much
52  Using Arduino / Project Guidance / Re: Beginner needs help choosing the right Battery for arduino project on: January 31, 2013, 03:06:06 am
You need to figur out how much current (and at what voltages) each unit/device needs when running. This is not trivial :-)
Then you need to figure out how long tim your setup should be able to run powered from the battery.

Then you can start calculating what battery you need.

You also need to take the total max power dissipation of the Nano into consideration, is it even possible to run all those things of the Nanos voltage regulator ? (i doubt it).
53  Using Arduino / LEDs and Multiplexing / Re: Can Arduino Uno Power 12v short LED strips? (new user needs help!) on: January 30, 2013, 02:44:33 am
Check this site:

http://www.stumbleupon.com/su/1ZsVg5/genericnerd.blogspot.com/2009/05/arduino-mood-light-controller.html/

If you just want to control the RGB levels, you can skip most of the components in the lower left part of the schematic.
54  Using Arduino / Project Guidance / Re: RGB LED Matrix spread over 400 square feet (43 square meters) on: January 29, 2013, 04:22:31 am
It's about 1000 RGB LEDS or the equvivalent of 3000 individual LEDs (20 cm apart = 25 pr/m2).

But that is still a very large amount of LED's to control individually.

I would do as GoForSmoke suggests, create a modular design with a local controller for say each squaremeter controlling 25 (75) LED's, then hook up all the local controllers somehow to a "central intelligence unit".

There are lots of potential trouble spots, including power supply and method of controlling 40 individual modules.
55  Using Arduino / Programming Questions / Re: my analog signal very noisy !! on: January 27, 2013, 05:19:04 am
I think we need a little more information

It would help a lot if you told us:

    -what senor it is
    -where the datasheet for it can be found
    -how you hooked it up to your Arduino

And maybe posted your code.
56  Using Arduino / Project Guidance / Re: Possible Leonardo damaged on first sketch ? on: January 27, 2013, 04:45:09 am
I don't know what drivers come with the Leonardo board, but the ordinary Arduino board uses drivers for the FTDI chip.

Try to find out which drivers the Leonardo board uses and reinstall them.
57  Using Arduino / Project Guidance / Re: increase sketch size for arduino webserver ( Uno and ethernet shield) on: January 24, 2013, 07:22:25 am
No there is not really anything you can do, except by an Arduino Mega that has more flash and more RAM.

Of course thee is always the possibility that your sketch can be optimized / rewritten in some way to take up less space.

58  Using Arduino / Interfacing w/ Software on the Computer / Re: Slow Compiler on Win 7 on: January 24, 2013, 02:44:17 am
First thing i would check is the Java version and upgrade if needed.
59  Using Arduino / Interfacing w/ Software on the Computer / Re: Gobetwino is running very slow after a few hours - anyone else had this? on: January 21, 2013, 02:26:08 pm
The problem has been fixed in GoBetwino
60  Using Arduino / Project Guidance / Re: Data transmission with a modulated LASER on: January 20, 2013, 02:30:32 am
http://blog.makezine.com/2008/08/13/laser-modem-with-an-ardui/
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