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31  Using Arduino / Project Guidance / Re: Gobetwino reading problem on: April 11, 2013, 12:28:59 pm
I don't know anything about Mathlab, but can't it do serial communication ? , so why not let Mathlab send data directly to Arduino ?
32  Using Arduino / Interfacing w/ Software on the Computer / Re: Easy way to Visualize and Store Serial Data on PC/Laptop? on: April 06, 2013, 05:39:07 am
GoBetwino can send data directly into an Excel sheet, or log it to a csv file
33  Using Arduino / Project Guidance / Re: Reading 10+ LDR with Arduino on: April 03, 2013, 12:56:55 pm
You can breadboard it with just the chip.

The CD4067 has 16 "inputs" if you need more than 8
34  Using Arduino / Programming Questions / Re: how can i use gobetwino to open an image? on: March 31, 2013, 03:40:16 am
You would need one of the commands that start a program, then start the program that will diplay your picture.

The SPRID command can start any program on the PC like paint or whatever program you want to how your picture.

It can also be used to run your default program for the image type.

Read the supplied documentation for examples on starting programs.
35  Using Arduino / Project Guidance / Re: Ardunio and MySQL on: March 14, 2013, 12:10:23 pm
With GoBetwino running on your PC (Windows only) you can have your Arduino send commands that makes GoBetwino read a line from a txt file and return the result to Arduino.

Of course you cant read and write to a txt file at the same time o a little housekeeping would be needed.
36  Using Arduino / Project Guidance / Re: arduino and matlab on: March 12, 2013, 02:00:37 pm
There was a bug in GoBetwino that showed its ugly face when running the program for extended time. This has been fixd in the version you can download now.

It was a stupid error with the two textareas in the main window that would end up holding so much text data that it made GoBetwino (and sometimes Windows) run extreamly slow. In the current version this has been fixed.
37  Using Arduino / Interfacing w/ Software on the Computer / Re: Best way to communicate with Uno from any PC / laptop (if this is possible)? on: March 03, 2013, 04:08:56 pm
The USB port on the Uno is really just a serial port in disguise. So any programming language that can send data over a serial port (most) will do the job.

If you do not already have experience with any programming tools, Processing (a cusin of Arduino) is a good place to start:

www.processing.org
38  Using Arduino / Project Guidance / Re: 64 analog reads on: March 02, 2013, 01:41:32 pm
If 48 was enough you could use this:

https://www.sparkfun.com/products/9832

It uses 3 4067 muxes
39  Using Arduino / Project Guidance / Re: 64 analog reads on: March 02, 2013, 11:08:32 am
4 CD4067 multiplexers will give you 64 analog inputs.

How often do you need to read them?

40  Using Arduino / Programming Questions / Re: Changing Baud Rate Doesn't Work on: February 22, 2013, 01:25:34 pm
And if you do not put a delay in your loop it's going to execute the serial.println statement thousands of times every second which will result in totally unpredictable results.
41  Using Arduino / Project Guidance / Re: Is it possible to power a DC motor? on: February 18, 2013, 02:11:26 pm
Just remember that for a short moment when a DC motor start up it might draw up to10 times as much current as it do when running, in this case that would far excede what yo can draw from the Arduino board. It might also interfere with the Arduino board, or make it reset.

I would go for a seperate powerupply and use the usual transitor + back emf protection diode to drive it from Arduino. (or an H bridge if direction control is needed).
42  Using Arduino / Project Guidance / Re: Wifi control of Tascam Reel to Reel tape machine on: February 14, 2013, 10:43:47 am
Since there is going to be a tape recorder close to, relays are probably not the best option, both for noise and magnetic reasons.

I would go for optocouplers, they are cheap, simple to implement and will compleatly isolate the Arduino from the remote control device.

Here's a good intro to optocouplers:
http://tronixstuff.wordpress.com/2010/09/21/education-introduction-to-the-optocoupler/
43  Using Arduino / Interfacing w/ Software on the Computer / Re: Serial Freezing on: February 09, 2013, 04:45:13 am
Probably a memory issue, but without your code it's impossible to tell.
44  Using Arduino / Project Guidance / Re: HELP!! Controlling a 5 plate Hotpress machine on: February 07, 2013, 08:25:37 am
You can probably control the power to the heating elements with relays, that is rather easy with Arduino, of course you should know what you do as it involves potentially lethal voltage and current levels.
45  Using Arduino / Audio / Re: 555 Timer as a Square Osc? on: February 07, 2013, 08:17:08 am
As far as i remember the CV input on pin 5 can only control a small part of the freq. range of the oscillator.
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