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1  International / Portugues / Re: Case ou caixa plástica para projeto on: February 19, 2014, 07:59:12 pm
Esqueci mesmo de postar o linke...

2  International / Portugues / Re: Case ou caixa plástica para projeto on: February 19, 2014, 12:20:28 am
Esse site tem alguns modelos para o Arduino.

Não sei se ele faz alguma por encomenda, mas não custa nada tentar né? Entra em contato com o cara e vê se ele faz.

Se não em engano ele é da Armênia.

OPS: Faltou o link mesmo

é esse aqui :
3  Community / Products and Services / The EX¹ - rapid 3D printing of circuit boards on: November 13, 2013, 04:36:14 pm
Cool kickstarter circuit printing!

4  Using Arduino / General Electronics / Reading Timing Diagrams on: November 01, 2013, 09:52:39 pm

I am a programmer, but with a lack of knowledge about electronics. Started to learn a few months ago.

Now I am trying to develop some drivers (libraries for specific components), but I don't know exactly how to read and understand a timing diagram like this:

If there is any book or website teaching it would be great !

I tried Google already and found some sources, but can't find one with "deepness".

Thanks in advance.
5  Using Arduino / LEDs and Multiplexing / Re: How to source current to a common anode RGB led Matrix on: July 26, 2013, 08:05:21 am
This video presents a usefull tutorial about common anode matrix (not RGB, but it can be helpful).

6  Using Arduino / LEDs and Multiplexing / Re: LED Dot Matrix Basic Animation - Beginning Arduino: Project 19 on: March 07, 2013, 07:49:54 pm
Here you can see a guy explaining the problme in project 19
7  Using Arduino / LEDs and Multiplexing / Re: Externally powering LEDs so Arduino doesn't fry on: February 08, 2013, 08:28:00 am
OK I will try one more time, but this is a triumph of hope over expectation because you have ignored facts in the past.

I used to do this for a living so I have been involved with this process professionally.

Look at how reliability of a circuit is measured, calculated, worked out. An link, this is one of the first I found:-
Look at the bath tub curve. This shows that you can get a failure at any time but there is more chance of getting one early or late.

Read the bit about stressing components.

Now the more a thing is subjected to stress, the shorter is it's life, this applies for lots of things including electrical circuits.

Now do you understand why one sample tells you nothing about the reliability of a system design?

I see that this thread is "tense", but it continues to reveal itself very educational afterall !!
8  Community / Products and Services / Re: Want a gift? Do not hesitate! on: January 02, 2013, 06:31:31 am
Cool, but...

In the website there is an alert saying:   "This activity will continue until January 1st, 2013. All gifts will be shipped by HK air mail in Januy 3rd 2013."

And you posted this message today.

But that is not a problem at all.

I like iteadstudio even without the gift smiley
9  Using Arduino / Microcontrollers / Re: Correct pitch of ATMega128 TQFP64 on: December 30, 2012, 10:28:46 am
Thank you  !

Some day I will know how to read the entire datasheet smiley

Now I understand that there are two packages: 64A (0.8mm) and 64M1 (0.5mm). But only the 64A is TQFP.

Thanks again !!!

10  Using Arduino / Microcontrollers / Correct pitch of ATMega128 TQFP64 on: December 30, 2012, 10:10:34 am
I am planning to buy some ATmega128 (TQFP64) and some DIP adapter (

My problem is to discover the correct pitch I need to look for. 0.8mm or 0.5mm.

I believe that ATMega128 is 0.8mm. Am I right ?
11  Community / Exhibition / Gallery / Re: Alarm clock from Atmega328 and 7-segment display on: December 22, 2012, 10:10:30 pm
Hi, cool project.

I have one simple question. The LM7805 does not need a heatsink ? Can I use it without a heatsink when converting 12V to 5V ?

Thanks in advance.

12  International / Portugues / Re: ARDUINO Wi Fi x TL-WR702N on: November 09, 2012, 01:28:16 pm
Não é a mesma placa, mas atinge o objetivo:

e custa certa de US$ 14

Tenho uma dessa e funciona 100% smiley
13  International / Portugues / Re: sensor LM35 retornando valor negativo on: October 08, 2012, 08:23:50 am
Tive um problema parecido com esse, mas era um LM335 (e nao o LM35) que retornava o valor em Kelvin, ai tinha que converter para Celsius...
14  International / Portugues / Re: Ajuda com e float on: September 29, 2012, 04:34:09 pm
Para isso voce pode usar a função atof()

char text[] = "3.14";
double vlrDecimal  = 0;

vlrDecimal = atof(text);

15  International / Portugues / Re: Ajuda com e float on: September 26, 2012, 07:15:31 pm
Tem a função parseFloat()

vlr = Serial.parseFloat();
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