Parola A to Z – Multi Zone Displays

Parola_Controlled_ZoneA very powerful feature of the Parola library is the ability to separate a display into a number of zones. This allows the implementation of sophisticated animations schemes and is a key part of being able to create double height displays.

This post explains what they are, how they are set up, and how to manage them.

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Parola A to Z – Adapting for Different Hardware

Parola_ModuleAn ongoing question on many Arduino forums is the adaptation of software to the different types of matrix modules. Usually the poster has tried some LED matrix software and the display is reversed or upside down, or animations are disjointed across the module boundaries.

There are clear reasons this happens, and the Parola library has software configuration parameters that allow you to adapt how the software operates to suit your hardware module.

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Parola A to Z – Double Height Displays

parola_dh_single_doubleUsing the Parola library for double height displays is becoming increasingly popular with library users. Setting up the hardware and the library is not difficult, but it can cause problems if not done correctly. This article will explain the hardware and software setup considerations for trouble-free double height displays.

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Parola A to Z – Managing Animation

azparola_animationAs the main function of the Parola library is to enable text animations, it is important to understand how these are set up and managed to completion from user code.

From a user perspective, Parola animation consist of 3 parts – setting up, running and resetting the animation. The process is not complex and is illustrated in the numerous library examples. This article breaks these down and explains how the Parola class methods apply in each phase.

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Parola A to Z – Text Animation

azparola_animationThe key function of the Parola library is to display text using different animations. These animations are built around a core supporting framework and largely follow the same patterns. This article explores how Parola animations code is constructed so that advanced users of the library have enough information to be able to write (and contribute!) their own new animations.

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Parola A to Z – Managing Fonts

azparola_iconManaging fonts in the is a key factor in the Parola/MD_MAX72xx libraries to being able to support multiple languages and diverse alphabets.

In the first part we looked at how fonts are defined and the tools used to create the bitmaps for each character. In this part we will look at the Parola and MD_MAX72xx library methods that access and manage font data in the library code.

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Parola A to Z – Defining Fonts

azparola_iconThe Parola library allows you to display text on MAX72xx controlled LED matrices using a wide range of text effects. One of the base components for this flexibility are the replaceable fonts and the utilities that allow new fonts to be designed and implemented in the library code.

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MAX7219 LED Matrix Module Micro Word Clock

WordClockA Word Clock is a clock that tells the time using words.

In an era when super-accurate digital clocks are available to most people on the planet, it intrigues me that Word Clocks have a place as they only show the time to the nearest five minutes!

Building one has been on my project to-do list for a while, but I didn’t want to invest the time and money needed for the various ‘from scratch’ build projects that I found online.

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Adaptive User Input with a Rotary Encoder

rotary_encoderI like using rotary encoders for user input as they can provide very precise control over settings. The built-in switch is also very convenient and makes it easy to implement the push button functionality I described in a previous post. Altogether, rotary encoders have a ‘modern’ feel that makes projects seem more professional.

There is one shortcoming of these devices, though, that I have recently worked to overcome.

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Switches as User Input Devices

KeySwitchThe humble switch is one of the major ways that users can interact with Arduino based code. Often the input comes from some variation of the momentary-on push switch, like the tact switch on the left, connected to an input on the microcontroller.

Users of modern GUIs will be familiar with being able to express themselves through a keyboard and a mouse. So user interface elements like double-clicks, long clicks and keyboard auto-repeat are familiar.

However, a lot of microcontroller code simply restricts the use of these switches to on/off functionality. Arduino programmers often don’t understand how to provide more features, even though a single switch can be made to do much more for a user.

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