Building Text to Speech Service Based on Festival

Posted on Fri 14 June 2019 in misc View Comments • Tagged with Javascript, TTS, T2S, Personal Assistant, Festival, Scheme

Last week I participated in Hackathon where we built a demo of domain specific personal assistant. One of the components of such system is the text to speech component.

In this post I will explain how I installed Festival speech synthesis system …

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Filtering Meetup Organizers with Greasemonkey Script

Posted on Sat 08 December 2018 in misc View Comments • Tagged with Javascript, Greasemonkey

Meetup and greasemonkey logo

I love meetups. It is a great opportunity to learn new things and expose myself to new ideas. I manly interested in the technological stuff, but I am not picky. Great concepts, ideas and life lessons has the quality of being applicable across multiple fields.

Every two weeks or so …

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How to Detect First Boot After Burning Program to Flash

Posted on Fri 12 October 2018 in misc View Comments • Tagged with Arduino, Embedded

I will write about Arduino, but this technique is relevant for any embedded situation.

Many applications require retaining data such settings or parameters between resets. On the Arduino, the already existing EEPROM of the Atmega chip is a common solution for this problem.

For the Arduino, the EEPROM library can …

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Line Rasterisation

Posted on Mon 06 August 2018 in misc View Comments • Tagged with Computer Graphics, Processing

Sometimes even the simplest things are not as simple as they look.

Screenshot of the drawing results

Recently, I had a task that required me to understand circle rasterisation. So I went back to my computer graphics course notes which I took many years ago to remind myself about how lines are drawn on a …

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Migrating Blogofile to Pelican

Posted on Sat 13 May 2017 in misc View Comments • Tagged with Blogofile, Pelican

Since I started writing this blog in 2012, I used Blogofile as the blogging platform.

Blogofile is a static website generator, meaning that the content is written and stored in a structured format like Markdown, then it is compiled offline into a set of HTML pages that can be hosted …

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About the Pitfalls of Merge Conflicts

Posted on Sat 31 December 2016 in misc View Comments • Tagged with Ada, Software Engineering, Source Control

I do not consider myself a novice software developer. And yet I still have not exceeded the list of things I can learn "the hard way".

Last month I had chance to learn about the dangers of resolving merge conflicts as well as how important is it to do a …

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Connecting MSP430 with ILI9341 TFT Display

Posted on Sat 30 April 2016 in misc View Comments • Tagged with ili9341, msp430, embedded

msp430 launcpad connected to ili9341 display

In the previous post I described how to connect ESP8266 with an ILI9431 TFT display using the Adafruit library. Texas Instruments' MSP430 is another popular low cost 3.3v MCU used by the maker community. It has Energia which is an IDE forked from and compatible to the Arduino IDE …

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Trying Ada Bindings for X11

Posted on Tue 01 September 2015 in misc View Comments • Tagged with Ada, X11

Ada bindings for X11 were written Intermentics company and sponsored by Ada Joint Program Office (AJPO).

While intemetics has long been gone (looks like the it's domain is owned by L3 now), and AJPO was closed in 1998, the bindings are still around.

The "latest" version can be downloaded from …

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Range Constrained Types in C++

Posted on Fri 05 September 2014 in misc View Comments • Tagged with C++, Ada

One of the first things a new Ada programmer will learn is the ability to define constrained type. Which means that one can restrict the values that can be assigned to a variable of this specific type.

For example:

subtype Positive is Integer range 1 .. Integer'Last;

Being a subtype …

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Template Argument Deduction

Posted on Sun 04 May 2014 in misc View Comments • Tagged with C++, generics

With automatic template deduction, it is possible to omit the template argument when instantiating a template function. The compiler will deduce the type from the actual parameter sent to the function. This is of course assuming there are no ambiguities.

For example:

template<class T>
T max(T x, T …

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