Connecting Nokia 5110 LCD breakout to Arduino

Hi

As I said in my last post, I have been playing with some hardware parts for Arduino.

In the "still to go" list I had:

• Ethernet breakout
• External EEPROM
• RTC (DS 1307)
• Nokia 5110 LCD

My plan was to tackle at least 2 of them during last weekend but I had a problem: all of this parts requires external components that I didn't have at hand. So I went to a local component shop but unfortunately I could not find most of the parts. 

The only part I had the required "missing" components was the Nokia LCD so I googled for "Nokia 5110 LCD  on Arduino" and voilá! The third entry in the results links to one great source of information about Arduino (and electronics in general). Now I was ready to start; I pulled my Arduino board, breadboard, the LCD (and required components) and put myself to connect them together.

My first disappointment came when I uploaded the sample application and nothing happened :(
Oopss.. maybe I have messed up with the connections... , let's see, pin x goes to y, pin z goes to w... no, everything looks connected correctly. After some head scratching I finally decided to do what I should have done from the beginning: Make sure the pin on my LCD breakout board matched the one in the Laydada  guide and of course they didn't! Compare the two pictures below (the red one is  mine and the blue one is the one used by ladyada):

As you can see they have different pinouts! Next step was to carefully reconnect the LCD and power on my Arduino (crossing my fingers hoping nothing bad had happened to neither my Arduino nor the LCD); this time everything but the backlight worked as expected; for some reason I could not explain the backlight refused to light up.  I checked and re-checked the connections many times but could not spot the problem. 

But at some point, during my investigation I could swear having seen the  backlight turning on and off; after some more testing I found out: by mistake I connected the backlight pin to the Arduino ground and that did the trick. But wait, both the LCD breakout schematic (not shown here) and the board itself does states that I should connect 3.3v on that pin... I have no idea what's happening here, but it is working. 

Next stop: external EEPROM.

Happy programming.

Arduwhat ?

Hi
Since I was 5 ~ 8 years old I was interested in mechanics, electronics and how things worked in general - my mother has some interesting histories about me disassembling all sort of devices (and usually not being able to put them together again); one in particular in which I got a saw as a "gift" (I was only 6 or 7 and someone gave me a real saw, not a toy, plastic one!) and went to put it into good use sawing some furniture :).

Even though having a high interest in electronics I ended up in the computer software field (just to make it clear: I do enjoy being involved in such fast changing, challenging industry :) and since then I've been having lots of fun (and some frustrations also).
As anyone involved with IT knows, keeping up to date with such a fast changing field requires a lot of effort and over time I put my electronics pretensions to rest (after all there are enough fun stuff in the computer world to play with to keep me busy for a long time...).
But about one year ago this started to change as I started to play with some basic (really basic) electronics stuff again (just for fun) and I stumbled on a small but very interesting piece of hardware: a small board with a microcontroller and a lot of software support with some nice characteristics (at least from my point of view ;) :

• Open Source Software / Hardware
• Inexpensive (will not cost you an arm and a leg :)
• Simple to work with, at least not as complex as the other options I had seem before (no complex, expensive tools required)
• Easily integrated with the "external" world (through sensors/actuators).
• Extensible (shields, breakout boards and virtually anything you want)
• Well supported
• Large community

which perfectly describes this nice board called "Arduino" (since the name Arduino is trademarked most probably you'll  find compatible devices under some generic brand named with a "duino" suffix).

At this point you may be wondering what can be accomplished with such beautiful piece of hardware... well, I guess it is fair to say that you can find an Arduino C/C++ library for virtually anything you can come up (of course this is not completely true, but it is not too far from the truth). IMO, the important  question is not "is it possible to connect X to Arduino" but instead "how hard is to connect X to Arduino" and based on the list bellow (which I wrote based on information I found) I conclude that, excluding more exotic hardware, it does pretty well job on this topic (note that almost all items in the list bellow requires extra hardware): 

• Sensors
• Temperature, Pressure, Gas, Light, Distance, Color, Humidity, Accelerometers, etc.
• Communications
• Bluetooth, TCP/IP, UDP/IP, Serial, GPRS, Infrared, etc.
• Storage
• EEPROM, SD cards
• Actuators/Output
• Step Motors, Servos, DC Motors, LCDs, etc

As you can see it is quite flexible, and more importantly, all of the hardware above have at least one Arduino library ready to be used.

This post is not intended to be an Arduino introduction / course / tutorial. Instead it is meant to be only a teaser so if you want to learn more, you can find lots of information in the internet. Personally there are some sites I highly recommend you to give a visit:

• http://arduino.cc/en/ (main Arduino site)
• http://arduino.cc/en/Guide/HomePage
• http://tronixstuff.wordpress.com/tutorials/
• http://arduino.cc/en/Tutorial/HomePage
• TED Talk about Arduino
• http://www.ladyada.net/learn/arduino/
• http://www.youtube.com/watch?v=fCxzA9_kg6s  (english)
• http://www.youtube.com/watch?v=inYEsklZXNE&feature=relmfu (Portuguese)
• Arduino by Make Magazine
• http://blog.makezine.com/tag/howtoswithmatt/

Also, if you want to buy Arduino related hardware you can go to your favorite search engine and search for it and I am sure you'll be able to find lots of stores that sell them. But if you don't want to search, bellow you can find a list of sites in which you can buy Arduino parts (ps: I have no affiliation with any of them :).

• http://arduino.cc/en/Main/Buy
• www.dealextreme.com
• www.ebay.com
• http://adafruit.com/
• http://www.seeedstudio.com/depot/
• http://www.sparkfun.com/

Finally, some electronics interesting tools:

• http://fritzing.org/
• Eagle PCB design

Well, that's it. Now let me get back to play with my just arrived Arduino!

In the next post I hope to shed some light about my current projects related to Arduino (both soft and hardware).

Hope you found this post interesting.