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: November 2012
Setting the precise dimensions of a window
I wrote this little program to let me set the exact dimensions of any window on my desktop. This is something I often need to do for taking screenshots that fit nicely in a blog post. The complete C code … Continue reading
RoboSlam: robots for beginners
Next week, as part of our continuing drive to push the love of engineering and programming out into the wider community, Damon Berry and I are running a two-part robot building workshop for beginners called RoboSlam in MAKESHOP on Lincoln … Continue reading
Posted in Uncategorized
Tagged Ivan Twohig, LaunchPad, MAKESHOP, MSP430, MSP430G2553, RoboSlam
2 Comments
Simple dsPIC33FJ32MC202 example
This is a very simple example circuit and C program for Microchip’s dsPIC33FJ32MC202 microcontroller. The basic circuit used to connect the PICkit 2 to the dsPIC33FJ32MC202 is shown below. One thing that confused me when I tried to wire this … Continue reading
Posted in Uncategorized
Tagged C, dsPIC, dsPIC33F, dsPIC33FJ32MC202, example, PIC, PICkit 2, simple, XC16, xc16-gcc
19 Comments
Rational Hunt: Finding a rational approximation to a value
Earlier this afternoon, I was trying to work out why the internal fast RC oscillator in every dsPIC microcontroller (well, every one I’ve used) has a frequency of 7.37MHz. It turns out that it’s because it facilitates the convenient production … Continue reading
Servo motor control example for the PIC18F4620
This is a simple servo motor control example for the PIC18F4620 microcontroller. The servo is controlled by the PWM signal from CCP1 (pin 17 on the PIC). The PWM period is 20ms and the pulse width varies between 1ms and … Continue reading
Posted in PIC, Uncategorized
Tagged CCP1, CCPR1L, PIC, PIC18F, PIC18F4620, PR2, pulse width, PWM, servo, Tcy
17 Comments
Polyphonic Keypad
Inspired by Paul Leamy’s dsPIC musical instrument, the microKey, I’ve just created a little polyphonic instrument of my own using a 12-button keypad that Richard Hayes gave me a couple of months ago. The code is set up to scan … Continue reading
Posted in Uncategorized
Tagged audio, dsPIC, dsPIC30F, dsPIC30F4011, frequency, keyboard, keypad, matrix, music, OC1R, OC1RS, octave, output compare, PDC1, pitch, polyphonic, PR2, PR3, PTPER, PWM
3 Comments
Creating a shadow template of a PGM image
I’ve just been cleaning up a scanned copy of a line drawing on paper. The background of the scanned image is quite dark and the shadowing is a bit uneven over the full image region, which makes it difficult to … Continue reading
Posted in Uncategorized
Tagged background, C, fclose, fopen, fprintf, fscanf, gcc, greyscale, image processing, MinGW, PGM, plain text, shadow
1 Comment
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