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Building an Arduino Temperature Sensor with an LCD Display


As part of my learning curve for open source hardware, and basic electronics.  This project wont take you very long, maybe an hour at most.

What this does is pretty straight forward, it shows the temperature in real time for both Celsius and Fahrenheit.  I’ve added some code to the Nokia, which uses the analogWrite trick (that is, use one of the digital outputs that has a tilde in front of it ( ~ ).  This will let you send a modulating frequency, which means you can make the LED (backlight in this case) brighter and dimmer.  The brightness of this display is controlled using the trimpot (potentiometer).


MockIt! Beta 2: Some Statistics and Release Notes

Recently, the Beta 2 version of MockIt! was released in BlackBerry BetaZone. With this release I was able to implement the most requested features and fixes and refine the UI/UX. Since its release, Beta 2 has been downloaded over 7,000 times by over 5,000 unique BlackBerry IDs. Moreover, over 14,300 testers have enrolled in the MockIt! beta program since launch, and MockIt! (all versions) has been downloaded a grand total of 28,000 times.  Keep reading for all the changes and some details regarding the roadmap.


Meggy Jr RGB

Recently, a friend introduced me to Arduino.  Rather, he’s been trying to introduce me for a while and I’ve just been too darned busy to play with it. 

So, I took on some projects and spent some energy on it this last month.  As a result, I have a handful of posts coming up about open source hardware :)

First up, Meggy Jr from evil mad scientist.

Not really an arduino, it was a great way to warm back up to soldering and electronics.  The entire kit took about two hours to assemble, and requires some hand tools as outlined in the manual.  I went ahead and picked up a tool kit from SparkFun as my old soldering iron has seen better days – which is another interesting (albiet expensive) electronics company I have purchased from in the past.

At the same time, I also purchased an Arduino Esplora + TFT from CanadaRobotix – but more on that later.


Quick Tip: Invoking the Media Preview "Card" [updated 12-31-2013]

The Invocation framework is one of the hallmarks and great strengths of the BlackBerry 10 operating system, and can allow us developers to easily integrate with core and third-party applications. To make the process easier, in this tutorial I will show you how to implement an Invocation Manager that you can can call at will from inside your QML to invoke just about any card or app available.

As usual, we will be starting with a standard empty Cascades project and working from there, so in Momentics, start a new empty project and name it whatever you wish (I will be using 'InvokeMediaCard'), and I will be using an API level of 10.2. 



Fundamentals Brief: Calling C++ functions from QML

This tutorial is the first in a series of very brief and concise tutorials covering some basic fundamentals needed to develop BlackBerry apps using Cascades.

There comes a time when a Cascades developer may need to utilize C++ in conjunction with his or her QML. Many developers use JavaScript for app logic and sidestep using extra C++ logic entirely. Having the ability to use JavaScript  and/or C++ in conjunction with QML is one of the strenghts of Cascades development, so pick your poison. That being said, this tutorial is meant to be a brief and very basic introduction to the "how" when it comes to calling C++ functions from QML and returning the result of the function back to your QML.

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