Copyright © 2010-2023 Ted Burke, All Rights Reserved.
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Recent Posts
- Set timezone to Europe/Dublin at command line in Debian Live
- Arduino Nano Timer 1 interrupt example for 100 Hz sampling
- Running Arduino IDE in a Debian Live session
- Installing VirtualBox on Debian 11
- More PRBS turtle graphics
- PRBS visualisation in the style of turtle graphics
- Using ffmpeg to take a snapshot with a webcam in Windows
- Using a serial byte sent from an Arduino to launch an application on the PC
- Generating variations on a code analysis question in a Brightspace quiz
- How to merge two Garmin .fit files and upload to Strava on Ubuntu
- Moving statue of David Foster Wallace
- TU Dubuntu 19.10 – a customised live USB version of Xubuntu Linux 19.10 for TU Dublin
- Using Canon EOS 70D DSLR as a USB web cam in Xubuntu Linux 19.04
- TU Dubuntu – a customised live USB version of Xubuntu Linux 19.04 for TU Dublin
- Using the PHP command line web server to transfer files between devices on a local network
- €5 PPG – photoplethysmogram amplifier / Arduino circuit
- Clap detector circuit / AirSpell typing system
- AirMouse – control mouse pointer in Linux using one switch or by blowing on microphone
- Some RGB fractal doodles
- How to display USB webcam as live video on desktop using mplayer
- Ronan Byrne’s ultra low-cost brain-computer interface
- H-bridge control example for Arduino Nano (ATmega328) – two phase-displaced square waves
- An offcut from the Fraktalismus pattern factory
- Cafe Terrace at Starry Night
- €2 Robots in DIT
- A brief introduction to binary numbers…
- Can the PIC12F675 drive motors directly from its GPIO pins?
- Minimum Viable Program for PIC12LF1572
- dsPIC30F Quadrature Encoder Interface (QEI) – Basic Example
- Simple example program for the PIC12F675 microcontroller
- A simple way to read and write audio and video files in C using FFmpeg (part 2: video)
- A simple way to read and write audio and video files in C using FFmpeg (part 1: audio)
- Fraktalismus Outtakes: Sea Monsters
- Fraktalismus – my presentation at Dublin Maker 2016
- Example code from presentation: Ways of Seeing Julia Sets
- C or Python? Comparison of execution time for Mandelbrot image generation
- Julia Set Explorer
- (no title)
- What I’m working on right now…
- Simple 2-channel hardware PWM example for the MSP430G2452 microcontroller
- RoboSlam @ Dublin Maker – only two days away!
- Generating antiphase PWM signals with the dsPIC30F4011
- Very simple Python / Tkinter GUI to send selected keystrokes via serial port
- Using a dsPIC30F4011 to generating 4 PWM signals with equal duty cycles but at 90 degree phase increments
- Faster Mandelbrot image generation using numpy in Python
- Fractal variations using Python
- Using SendInput to type unicode characters
- Three PWM outputs with three different frequencies using the dsPIC30F4011 microcontroller
- 8-channel PWM with the MSP430G2553
- Simple Phaser Framework example – Flappy Words
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Monthly Archives: December 2012
IGBT control in a buck-boost DC-DC converter
Reader Jil Sutaria wrote in a with a query about controlling four IGBTs in a buck-boost DC-DC converter. Some of the main features of this application are: Two pairs of IGBTs need to be controlled. Each pair of IGBTs share … Continue reading
Posted in PIC
Tagged buck-boost, converter, dsPIC, dsPIC30F4011, duty cycle, IGBT, OC1, OC2, OC3, OC4, output compare, PWM
17 Comments
Variable exponent in Mandelbrot algorithm
In my previous two posts, I generated images of the Mandelbrot Set using the conventional iterative mapping function to generate the sequence of complex values for each point in the area of the complex plane that was shown. I’m struggling … Continue reading
Posted in Uncategorized
Tagged animation, C, exponent, fractal, ImageMagick, Mandelbrot, Mandelbrot Set, PGM, variable
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More Mandelbrot
Here’s a modified version of the mandelbrot program from the previous post. This time, the generated images are in colour and output in binary PPM format (which is still uncompressed, but a bit more space efficient than the plain text … Continue reading
Posted in Uncategorized
Tagged animation, C, exponent, fractal, Mandelbrot, Mandelbrot Set, PGM, PPM, variable
1 Comment
Visualising the Mandelbrot Set
I suppose it’s about 20 years since I first read about Benoit Mandelbrot and his pioneering work on fractal geometry. Ever since then, I have been intrigued by how fractal images with beautiful and complex textures can emerge from very … Continue reading
Posted in Uncategorized
Tagged animation, C, exponent, fractal, Mandelbrot, Mandelbrot Set, PGM, PPM, variable
7 Comments
Visualising logistic map chaos
The other day, I had a fascinating conversation with my friend and colleague, Paul Tobin. I had been thinking about using some kind of chaotic oscillator in a music synthesizer toy I’ve been playing around with and, since Paul is … Continue reading
Vision: a DirectShow machine vision engine
For the last few weeks, I’ve been working sporadically on a DirectShow reimplementation of the simple machine vision engine I wrote for my Robotics class. The original version used the old Video For Windows API, which is relatively simple, but … Continue reading
Posted in Uncategorized
Tagged cl.exe, DirectShow, image processing, machine vision, video, video capture, Vision, Win32
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