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Low-cost motor control by displaying coloured shapes on a phone or PC screen
Smart phones pack a lot of features (battery, display, sensors, audio i/o, wireless internet connectivity, computing power, etc) into a tiny, convenient, inexpensive package. A smart phone therefore...
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Installing Microchip XC16 in CrunchBang Linux
XC16 is Microchip’s C compiler for the 16-bit dsPIC microcontrollers (PIC24, dsPIC30F, dsPIC33). I sometimes need to use it when I’m working in a live session in CrunchBang Linux. First download the...
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Simple Phaser Framework example – Flappy Words
I spent some time this week playing Aoife Crowley’s Flappy Bod game (my top score = 8). I was really impressed by the simplicity of the Phaser Framework which it runs on, so I decided to try it out for...
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8-channel PWM with the MSP430G2553
Last week, I spent a bit of time working out how to generate PWM for servo control using the MSP430G2553. It took me a couple of hours to work it out, but worked well once I got it going. Today, I’ve...
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Three PWM outputs with three different frequencies using the dsPIC30F4011...
Arising out of an interesting online discussion with Jaime Mora in the Costa Rica Institute of Technology, I wrote this example program to show how three PWM outputs, each with a different frequency,...
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Using SendInput to type unicode characters
I received a query from reader Partha D about generating unicode keystrokes using the SendInput function in Windows. As I understand it, Partha wants to generate one or more unicode keystrokes when a...
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Fractal variations using Python
Every once in a while, I spend an hour or two playing with code to generate fractal images. I find these patterns intriguing and the process of working with them can make for a great workout in complex...
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Faster Mandelbrot image generation using numpy in Python
# # fractal.py - Mandelbrot image generation using numpy # Written by Ted Burke - last updated 2-11-2014 # import numpy # Define image size and region of the complex plane w,h = 1280,1280 remin,remax...
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Using a dsPIC30F4011 to generating 4 PWM signals with equal duty cycles but...
In a recent comment on one of my blog posts, Saptarshi De posed an interesting problem: How can the dsPIC30F4011 be used to generate four PWM signals of equal (but variable) duty cycle at 90 degree...
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Very simple Python / Tkinter GUI to send selected keystrokes via serial port
Following a query from Naomi Dickerson, I was playing around with my SerialSend program, which I often use for sending arbitrary bytes or characters to a connected microcontroller circuit. Sometimes,...
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Generating antiphase PWM signals with the dsPIC30F4011
I frequently receive queries from people who are using a dsPIC microcontroller to control power electronics of some kind, such as in an inverter, a voltage converter, or similar. Many of these queries...
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RoboSlam @ Dublin Maker – only two days away!
batchloaf:Looking forward to Dublin Maker on Saturday in Trinity! Entry is free and all are welcome. Our stand will be the one where humans are getting tricked into building a robot army. Originally...
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Simple 2-channel hardware PWM example for the MSP430G2452 microcontroller
// // 2-channel hardware PWM example for MSP430G2452 // Written by Ted Burke - last updated 2-11-2015 // #include <msp430.h> int main( void ) { // Watchdog timer WDTCTL = WDTPW + WDTHOLD; //...
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What I’m working on right now…
I’ve been experimenting with creating fractal images using iterating functions of the form where . Without getting into all the details right now, within each frame of the animation every pixel...
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Article 0
# # vary_ab.py - Written by Ted Burke, last updated 18-1-2016 # import subprocess import math centre = 0 + 0j # complex value at centre of image w,h = 400,400 # image width and height pxw = 0.02 #...
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Julia Set Explorer
In the past, writing simple programs to generate fractal images is something I have found myself returning to over and over again. I’ve done it so many times that I can probably write a Mandelbrot Set...
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C or Python? Comparison of execution time for Mandelbrot image generation
Because I’ve been generating a lot of fractal images recently, I’ve found myself spending quite a bit of time sitting around waiting for programs I’ve written to finish long repetitive calculations. In...
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Example code from presentation: Ways of Seeing Julia Sets
I gave a presentation at yesterday’s DIT School of Mathematical Sciences lunchtime research seminar titled Ways of Seeing Julia Sets: Visualizing the forces that shape fractal Julia sets. This was the...
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Fraktalismus – my presentation at Dublin Maker 2016
A zip archive of my complete Fraktalismus folder (containing all the content for the presentation) can be download here: Fraktalismus.zip (93.9 MB) This is the code I used to create the Julia Set...
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Fraktalismus Outtakes: Sea Monsters
Sea Creature 1 // // seacreature1.c - Creates a fractal "sea creature" // Written by Ted Burke, last updated 3-8-2016 // // gcc seacreature1.c -o seacreature1 -lm // ./seacreature1 // ffmpeg -framerate...
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