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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
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- 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: January 2013
Simple interrupt-driven sampling example for the dsPIC30F4011
Reader Swetha wrote in with a query about performing 10Hz sampling on a dsPIC30F4011 in some kind of energy monitoring system. The following example illustrates a basic structure for interrupt-driven sampling using Timer 1. I compiled this program with Microchip’s … Continue reading
Visualising transfer functions in the Z-domain
I’m fortunate to share an office with DSP guru Richard Hayes who, over the last week or so, has given me a couple of brilliant 20-minute tutorials on the Z-transform which have really helped to clear up some points that … Continue reading
Posted in Uncategorized
Tagged animation, complex, ImageMagick, Python, surface, system, transfer function, visualisation, visualization, Z-domain, Z-transform
2 Comments
Updated version of IGBT control program for buck-boost dc-dc converter
This is an updated version of my IGBT control example for the dsPIC30F4011, which appeared in an earlier post. In this version, an analog control signal on pin AN6 is used to vary the duty cycle of the waveforms produced. … Continue reading
Posted in PIC
Tagged buck-boost, converter, dsPIC, dsPIC30F4011, IGBT, OC1, OC2, OC3, OC4, output compare, PWM
28 Comments
Nasty 4-channel logic analyser using dsPIC30F4011
This post is about a quick and dirty 4-channel logic analyser that I hacked together to get a snapshot of four parallel binary signals from something I was building. I just want to quickly capture this information here for the … Continue reading
Posted in PIC
Tagged dsPIC30F4011, dsPIC, C, XC16, logic analyzer, sampling, logic analyser, digital signal, capture
2 Comments
Running CommandCam from Excel using VBA
Reader Percy Kumah wrote in with a query about running CommandCam (my free command line image capture utility) from MS Access using VBA. Since I don’t have Access installed myself, I tried it in Excel instead (also using VBA). Here’s … Continue reading
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