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16  Using Arduino / Installation & Troubleshooting / Re: Installing driver for UNO on: March 20, 2013, 03:37:34 pm
Thanks to Apple for creating such simple machines that allow to avoid these kinds of problems smiley
17  Using Arduino / Networking, Protocols, and Devices / Re: Two arduino communication (serial) on: March 20, 2013, 02:05:03 pm
You should consider the Wire library as well.
http://arduino.cc/en/Reference/Wire
18  Using Arduino / Project Guidance / Re: RF transmitter and reciver on: March 20, 2013, 02:03:05 pm
Or these:
https://www.sparkfun.com/products/10532
https://www.sparkfun.com/products/10534
19  Using Arduino / Interfacing w/ Software on the Computer / Re: Serial port prints on one line! How to solve? on: March 20, 2013, 10:56:55 am
alternative is the use of \n

Serial.print("first line\n second line\n");

Besides \n the \t (tab is also interesting as it allows to columnize numbers and text in the output (copy to Excel is a breeze;).

Thanks robtillaart! In fact I was doing a temperature logging project a while ago and I couldn't understand what "/n" means in other people's code examples. I worked with Excel as well in my project so your comment is very useful to me.
I didn't know nothing about "\t" at all, I always was searching for something similar to it.
Appreciate your help!
20  Using Arduino / Microcontrollers / Re: Why an Attiny85 running at 8MHz is under clocked when programming with Arduino. on: March 19, 2013, 10:07:16 pm
Tips here for minimal boards: http://www.gammon.com.au/forum/?id=11637

Those chips ship by default with the "divide by 8" fuse set.

Wow! Thanks for the link. I love your site by the way, Its very helpful smiley
21  Using Arduino / Programming Questions / Re: Serial.Begin statements on: March 19, 2013, 03:41:51 pm
Not in hardware.  

There is still SoftwareSerial available.  Depending on the device, this may be sufficient.

Didn't know that it is possible through software, but here is what the Library also says:

Quote
Not all pins on the Mega and Mega 2560 support change interrupts, so only the following can be used for RX: 10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
Not all pins on the Leonardo support change interrupts, so only the following can be used for RX: 8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).

It talks about the Mega and the Leonardo but not about Arduino UNO for example. So is it actually not compatible with all models?
22  Using Arduino / General Electronics / Re: How to control very very really very high currents with arduino? on: March 19, 2013, 02:22:44 pm
Using a relay:
https://www.sparkfun.com/products/100
23  Using Arduino / General Electronics / Re: how to reduce the electrical noise on: March 19, 2013, 02:22:02 pm
I think a pull–up resistor between a pin and VCC would help.


Which pin and VCC ? sorry im very new to arduino land.

For example: If you are using a wire (you would actually be using at least two in this case) to communicate with another Arduino. And you would want to reduce the noise, consider connecting a part of the wire to the vcc through a pull-up resistor. Connect the end of the wire to the final destination.
24  Using Arduino / General Electronics / Re: how to reduce the electrical noise on: March 19, 2013, 02:03:05 pm
I think a pull–up resistor between a pin and VCC would help.
25  Using Arduino / Interfacing w/ Software on the Computer / Re: Serial port prints on one line! How to solve? on: March 19, 2013, 01:55:40 pm
Well perhaps you could try using:

Serial.println(reading); instead of Serial.print(reading);

Lefty

Thanks for the post, exactly what I needed! smiley
26  Using Arduino / Programming Questions / Re: Map button matrix to integers on: March 19, 2013, 01:51:11 pm
That does not make sense either. You cannot read 2 pins at the sametime with just one digital read. I don't know, maybe we finally can, and I just didn't get the memo.

Maybee, we both didn't get the memo smiley-grin But what I meant in my code is reading the value of a button that is on a specific X Y coordinate. A 2D array must be used for this to work.
27  Using Arduino / LEDs and Multiplexing / Re: Resistors? on: March 19, 2013, 01:16:04 pm
Consider that the RGB leds have a common Anode+ instead of a common Cathode-. Try finding an RGB LED with an common Cathode-, it would be much easier to configure the LED that way.
28  Using Arduino / Project Guidance / Re: Tyre Pressure & Temperature Monitoring System on: March 19, 2013, 01:12:15 pm
Consider using an XBee as a transmitter or this set of RX linkers:

https://www.sparkfun.com/products/10534 - RF Link Transmitter (434MHz) from SparkFun for about 4$
https://www.sparkfun.com/products/10532 - RF Link Receiver (434MHz) from SparkFun for about 5$

http://www.ebay.com/itm/315Mhz-WL-RF-transmitter-and-receiver-link-kit-for-Arduino-ARM-MCU-/370776247168?pt=LH_DefaultDomain_0&hash=item5653fc8b80
Ebay Just $1.50 a pair!
29  Using Arduino / Project Guidance / Re: Control PWM fan speed depending on tempature on: March 19, 2013, 01:10:04 pm
Seems good, but consider geting some electronics to handle the current required for the fan and as for a termometer consider buying some thermistors:
https://www.sparkfun.com/products/250
30  Using Arduino / Project Guidance / Re: Which Resistors Would You Recommend on: March 19, 2013, 01:07:56 pm
In the future, consider an online LED current calculator such as this one:
http://ledcalculator.net/
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