Profile

Cover photo
Paul Gallagher
Lives in Singapore
165 followers|295,509 views
AboutPostsPhotosVideos+1's

Stream

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#221 XOR with Resistor-Transistor Logic
Exclusive OR (XOR) operation is true only when the inputs are different. An XOR may be constructed using combinatorial logic: an OR ANDed with a NAND. But can it be done with even more basic discrete components? This circuit uses a diode-bridge and a single...
Exclusive OR (XOR) operation is true only when the inputs are different. An XOR may be constructed using combinatorial logic: an OR ANDed with a NAND. But can it be done with even more basic discrete components? This circuit ...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#219 DS18S20 1-Wire Reading
Another way to measure temperatures, this time the DS18S20 - an inexpensive 1-Wire digital thermometer with a range of -55°C to +125°C, at ±0.5°C accuracy from -10°C to +85°C. It comes in TO-92 packaging and may be powered directly (using three pins), or ta...
Another way to measure temperatures, this time the DS18S20 - an inexpensive 1-Wire digital thermometer with a range of -55°C to +125°C, at ±0.5°C accuracy from -10°C to +85°C. It comes in TO-92 packaging and may be powered di...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#217 Basic AVR-controlled Buck Converter
Buck converters are switching power supplies configured such that the output voltage is lower than the input voltage. Since the primary components (inductor and capacitor) ideally consume no power, high conversion efficiencies are possible. In practice of c...
Buck converters are switching power supplies configured such that the output voltage is lower than the input voltage. Since the primary components (inductor and capacitor) ideally consume no power, high conversion efficiencie...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
Feature Lifecycle Analysis with PivotalTracker
Can you trust your agile planning process to deliver the best result over time? In an ideal world with a well-balanced and high-performing team, theory says it should all be dandy. But what happens when the real world sticks it's nose in and you need to dea...
Can you trust your agile planning process to deliver the best result over time? In an ideal world with a well-balanced and high-performing team, theory says it should all be dandy. But what happens when the real world sticks ...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#214 OSHChip gcc toolchain
Can I build a program for the OSHChip using the gcc toolchain and Nordic Semi SDK on MacOSX? Yes..ish! Here are my notes and scripts for compiling and deploy a simple program, but there remain a few rough edges. There are probably easier ways to do this ......
Can I build a program for the OSHChip using the gcc toolchain and Nordic Semi SDK on MacOSX? Yes..ish! Here are my notes and scripts for compiling and deploy a simple program, but there remain a few rough edges. There are pro...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#212 Stay Creative!
A simple project inspired by Make your own LED Sign VU Meter by GreatScott! . The catch-phrase should be familiar if you subscribe to his channel;-) It's a VU meter, but rather than doing the "bar graph" thing à la LM3915, it pulses the intensity of all LED...
1
Add a comment...
Have him in circles
165 people
Alex Nguyen's profile photo
Herryanto Siatono's profile photo
Đinh Ánh Ngọc's profile photo
Kira Nama's profile photo
Clayton Miller's profile photo
Tony phan's profile photo
Rob Vissers's profile photo
Sudhir Mishra's profile photo
András Csányi's profile photo

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#220 Arduino gcc toolchain
The Arduino IDE is the most convenient way to get started with Arduino, but it does obscure the underlying mechanics of building software for an Arduino. How to do it from scratch? This is my experiement and guide to building software for an Arduino from th...
The Arduino IDE is the most convenient way to get started with Arduino, but it does obscure the underlying mechanics of building software for an Arduino. How to do it from scratch? This is my experiement and guide to building...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#218 MPU-6050 3-Axes Accelerometer Gyroscope Module
I'm planning to build a controller that needs motion detection, so got hold of an Invensense MPU-6050 3-Axes Accelerometer Gyroscope Module to see if it would do the trick. The module conveniently operates on 3-5V. All I've done so far is a simple sketch to...
I'm planning to build a controller that needs motion detection, so got hold of an Invensense MPU-6050 3-Axes Accelerometer Gyroscope Module to see if it would do the trick. The module conveniently operates on 3-5V. All I've d...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#216 OSHChip driving SPI LED module
How easy is SPI with the OSHChip? I thought I'd find out by first controlling a module that has a very basic SPI-ish slave interface. I'm using the LEDx16Module that I designed in the KiCad like a Pro course from Tech Explorations. It has dual 74HC595 shift...
How easy is SPI with the OSHChip? I thought I'd find out by first controlling a module that has a very basic SPI-ish slave interface. I'm using the LEDx16Module that I designed in the KiCad like a Pro course from Tech Explora...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#215 OSHChip yotta toolchain
After bruising myself on the raw gcc toolchain - and although I got a program running - I think I want my toolchain to do more of the hard work for me! So next I tried yotta, the software module system used by mbed OS. Building a simple program using the Of...
After bruising myself on the raw gcc toolchain - and although I got a program running - I think I want my toolchain to do more of the hard work for me! So next I tried yotta, the software module system used by mbed OS. Buildi...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#213 OSHChip blinky
I heard about the OSHChip on the embedded.fm podcast #146 and immediately wanted one! An ARM Cortex-M0 32 bit micro processor (nRF51822) with 2.4 GHz Radio and other goodies all in a breadboard-compatible DIP16 package .. how could you say no?! So far, so g...
I heard about the OSHChip on the embedded.fm podcast #146 and immediately wanted one! An ARM Cortex-M0 32 bit micro processor (nRF51822) with 2.4 GHz Radio and other goodies all in a breadboard-compatible DIP16 package .. how...
1
Add a comment...

Paul Gallagher

Shared publicly  - 
 
LittleArduinoProjects#211 Buck Converter Modules
There are many super-cheap buck converter modules available, often based on the LM2596S-ADJ. The "BuckConverterModules" project is where I've recorded notes on the individual units I get to see. So far I've tested four. Two perform really well; two are OK b...
There are many super-cheap buck converter modules available, often based on the LM2596S-ADJ. The "BuckConverterModules" project is where I've recorded notes on the individual units I get to see. So far I've tested four. Two p...
1
Add a comment...
Paul Gallagher's +1's are the things they like, agree with, or want to recommend.
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