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Paul Gallagher
Lives in Singapore
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Paul Gallagher

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LittleArduinoProjects#182 Building a Bench Power Supply
I've wanted a variable mains-powered power supply for a while, so when I found this kit for a reasonable price I decided to give it a go. Some things that attracted me: 220V/110V mains-powered continuously adjustable output voltage isolated output nice acry...
I've wanted a variable mains-powered power supply for a while, so when I found this kit for a reasonable price I decided to give it a go. Some things that attracted me: 220V/110V mains-powered continuously adjustable output v...
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Paul Gallagher

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LittleArduinoProjects#180 Colpitts Oscillator
A Colpitts oscillator uses a combination of inductors and capacitors to produce an oscillation at the resonant frequency of LC circuit. To see that in action, I built one on a protoboard and it delivers an almost perfect 22.9kHz .. compared to the theoretic...
A Colpitts oscillator uses a combination of inductors and capacitors to produce an oscillation at the resonant frequency of LC circuit. To see that in action, I built one on a protoboard and it delivers an almost perfect 22.9...
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Paul Gallagher

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LittleArduinoProjects#173 Mini 64-LED Cube
LED cubes were a "thing" a few years back maybe ... but I've never built one. Time to fix that... Here's my "mini" 4x4x4 cube - 3cm per side with 3mm clear blue LEDs. Pretty compact, and delivers nice effects. The clear blue LEDs work really well - very bri...
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The Fretboard - a multi-project build status monitor
(blogarhythm ~ Diablo - Don't Fret ) The Fretboard is a pretty simple Arduino project that visualizes the build status of up to 24 projects with an addressable LED array. The latest incarnation of the project is housed in an old classical guitar … hence the...
(blogarhythm ~ Diablo - Don't Fret) The Fretboard is a pretty simple Arduino project that visualizes the build status of up to 24 projects with an addressable LED array. The latest incarnation of the project is housed in an o...
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Learning Devise for Rails
(blogarhythm ~ Points of Authority / Linkin Park ) I recently got my hands on a review copy of Learning Devise for Rails from Packt and was quite interested to see if was worth a recommendation (tldr: yes). A book like this has to be current. Happily this e...
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OH on the ABC Radio National By Design podcast (00:56): In the field: Paul Bennet For us the idea of small ideas that people can actually connect together and actually implement are very big ideas. And I'm sure you've heard p...
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Have him in circles
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Paul Gallagher

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LittleArduinoProjects#181 Voltmeter Modules
Voltmeter modules are a very convenient way of adding voltage display to any project, because they require no supporting circuitry or microcontrollers. There are two and three wire modules in the market. Two-wire modules are the simplest (and generally chea...
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LittleArduinoProjects#174 USB LED Notifiers
So four of these USB Webmail Notifier devices turned up in a dusty cupboard in the office. A quick tear-down shows they contain a super-simple circuit - just a SONiX Technology SN8P2203SB 8-Bit microcontroller that handles the USB protocol and drives an RGB...
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Retrogaming on an Arduino/OLED "console"
(blogarhythm ~ invaders must die - The Prodigy ) Tiny 128x64 monochrome OLED screens are cheap and easy to come by, and quite popular for adding visual display to a microcontroller project. My first experiments in driving them with raw SPI commands had me f...
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+Thiyagu Dakshinamurthy extreme constraints are good for some coding fun;-)
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555 Timer simulator with HTML5 Canvas
The 555 timer chip has been around since the '70s, so does the world really need another website for calculating the circuit values? No! But I made one anyway. It's really an excuse to play around with HTML5 canvas and demonstrate a grunt & coffeescript too...
The 555 timer chip has been around since the '70s, so does the world really need another website for calculating the circuit values? No! But I made one anyway. It's really an excuse to play around with HTML5 canvas and demons...
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My personal journal about all the best things in life in Singapore. Roti prata .. reading .. eating .. talk cock .. movies .. prata .. music .. more prata .. Tuesday, July 16, 2013. Modern Art. A great quote from Craig Damrauer that I found in "Steal Like an Artist".. Blogarhythm: Modern Life ~ ...
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(blogarhythm ~ Unpretty/Fanmail: TLC) There are some good ruby gems available for dealing with OAuth 2.0 and talking to Google APIs, for example: google-api-client is the official Google API Ruby Client makes it trivial to di...
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The Voice UK • Episode 4 Complete • Blind Auditions • April 14, 2012
www.youtube.com

This is the last of the blind auditions. Next week the battle rounds begin. For more about Tom Jones and to participate in a fan community,

GovCampSG [licensed for non-commercial use only] / Active Citizenry One ...
govcampsg.pbworks.com

Active Citizenry One App at a time. Page history last edited by GovCampSG 1 week, 2 days ago. Abstract: Everyone's going to be engaging

GovCampSG [licensed for non-commercial use only] / Wish List for Open Data
govcampsg.pbworks.com

Wish List for Open Data. Page history last edited by GovCampSG 1 day, 15 hours ago. Abstract: Even though the data is available, it is how y

GovCampSG [licensed for non-commercial use only] / Is Open Data enough
govcampsg.pbworks.com

Is Open Data enough. Page history last edited by GovCampSG 1 week ago. Abstract: data.gov.sg has a whole slew of raw data available for cons