1st December 2014
Another year, another circuit project per day for 24 days!
Contains 3 sub-articles.
10th May 2013
A quick teaser video about my exhibit for Maker Faire 2013 in San Mateo.
1st December 2011
A circuit project per day for 24 days.
27th November 2011
I finally build Charles Wenzel's Curious C-Beeper capacitance probing tool.
10th July 2011
BPW34 photodiode based gamma radiation detector.
3rd July 2011
An AC ion chamber detector for alpha particles only.
7th May 2011
A quick video thanking everyone involved in the 555 contest using one of my prizes.
27th February 2011
A quick random dialling hack for the adding machine to demonstrate it at the Wyong Field Day.
Parent article: 555 Adding Machine.
26th February 2011
Decimal adding machine built using 102 LM555s and a decadic dialling mechanism from an old rotary dial telephone.
Contains 1 sub-article.
5th February 2011
Junkbox electrical component blinking 555/LED spider sculpture project.
16th January 2011
A bit of fun with LEDs, transistors and capacitors.
8th January 2011
Idea of tomographic reconstruction of the internal structure of the Great Pyramid of Giza using cosmic ray muons.
26th December 2010
Experiments in wireless power transfer for a practical application, lead to some interesting side-bar observations on plasma physics, and the cutest little Tesla coil you've ever seen.
Contains 1 sub-article.
18th December 2010
Electroluminescent trimmed backpack inspired by TRON.
23rd October 2010
Simple blinkenlight project to Cylonify my workstation PC.
22nd August 2010
Some pictures from the recent Winterfest HAM radio meeting.
11th June 2010
A semi-finalised implementation of the passive air-band receiver and field testing while I was travelling in the US.
Parent article: Non-Emissive Airband Receiver.
5th June 2010
I get oddly low results when attempting to measure the speed of sound in Water and Aluminium.
22nd May 2010
A short video of the daring helicopter rescue I awoken to this morning.
20th May 2010
My quick go at estimating the size of the International Space Station and Space Shuttle Orbiter from the wonderful Thierry Legault solar transit photograph.
13th February 2010
Measurement of the half-life of Technetium-99m.
23rd January 2010
A low-speed data link implemented using Pierce quartz crystal oscillators controlled by a microcontroller.
Contains 1 sub-article.
28th December 2009
A web-based emulator for the 240 LED Christmas Tree project.
Parent article: 240 LED Animated Christmas Tree.
27th December 2009
I put together a USB ISP programmer for use with my Win32 laptop.
25th December 2009
A simple 4 channel, PMW-controlled, 240 LED Christmas Tree.
Contains 1 sub-article.
23rd December 2009
A large Christmas Star for my balcony made using a length of rope light and some timber dowelling.
Contains 1 sub-article.
20th December 2009
A charlieplexed 19 LED animated Christmas star for my Christmas tree.
13th December 2009
A proof-of-concept test bed for a range of animated electronic Christmas decorations.
8th December 2009
Some technical Yahoos assemble an office Christmas tree from over 430 soft drink cans.
7th June 2009
New pancake Geiger Müller tubes and a fairly small power supply for them.
2nd June 2009
Some photos from the June 2009 ARNSW Homebrew Group Meeting.
31st May 2009
Pictures from the May 2009 ARNSW Trash and Treasure meeting.
24th May 2009
Abuse of an old 2X2 vacuum tube with a HT power supply to create a soft x-ray source.
16th May 2009
No, of course not! No new physics here, just another lesson in electromagnetic compatibility and subtly of experimental physics.
18th April 2009
A quick hack based on Charles Wenzel's nuclear war detector.
23rd March 2009
The beginnings of a photoplethysmographic cardiotachometer.
16th February 2009
Tests of tinning various types of enamelled copper wire both from cut ends and through unbroken enamel.
Parent article: Wiring Pencil.
25th January 2009
The Jan 2008 ARNSW Trash and Treasure, plus the Homebrew Group meeting.
13th January 2009
I finally put up my discone antenna after many years of kicking it around the balcony and also install the weather station my parents gave me for my birthday.
5th January 2009
A solid-state emulation of the infamous "dekatron spinner" implemented using a 10-stage discrete ring counter.
18th October 2008
New "clean" URLs for the website and a new calculator engine.
27th July 2008
Lots of pictures from the ARNSW Trash and Treasure and Homebrew Group meeting.
27th July 2008
I attend a Killarney Heights Space Program launch.
4th July 2008
How to quickly measure the diameter of human hair...
29th June 2008
I put the 80 metre beacon in a box and do some more work towards an antenna for it.
Parent article: 80 Metre CW Beacon.
1st June 2008
Images of various microscopic life from my rain gauge.
24th May 2008
A quickie showing what 400 NE-2 Neon glow lamps do if you put them in a microwave.
29th March 2008
A prototype tone-coded multi-channel remote control system.
26th January 2008
Some images and words from this Australia Day.
20th January 2008
The HF Active Auroral Research Program conducted Luna bounce experiments on the 19th and 20th. I listened in.
30th December 2007
A fairly trivial Cellular Automata implementation as a Java Applet.
24th December 2007
Thoughts about building cellular automata in hardware.
17th December 2007
I add MathML support to this site using ASCIIMathML.
12th December 2007
I try to write an "about me" page.
9th December 2007
The website has been rewritten to support categorisation and given a much needed face-lift.
3rd June 2007
How I fixed my toilet cistern inlet valve with a Coke bottle cap.
20th January 2007
Another rotating multi-draw cabinet.
Parent article: Parts Cabinet.
5th March 2005
An incredibly crude soda straw hydrometer.
18th February 2005
Iron gall ink and a bamboo pen of sorts.
27th January 2004
A simple particle system simulation for making fireworks-like animations.
29th August 2003
An ancient Chinese invention, the Bamboo Dragonfly.
13th August 2003
Just what is inside those neat Neon plasma drinking cup things.
2nd August 2003
A small ball mill for crushing and mixing.
10th June 2003
Using red cabbage juice as a cheap homebrew pH indicator.
8th June 2003
A cardboard box pinhole camera that operates without film. The image is projected onto a screen for human observation. A quick and simple project to demonstrate pinhole optics.
24th March 2003
A Piņata the girlfriend and I built for her birthday party.
14th December 2002
Just how fast can you make a CD-ROM or DVD drive before the CD media fails?
14th December 2002
A simple reflection-pair optical tachometer head for my CD structural integrity tests.
10th November 2002
My small implementation of Bill Beaty's soda bottle electrostatic motor.
10th November 2002
My first meeting with Bill of SolderSmoke fame.
Parent article: Trivial Electric Motor.
3rd November 2002
Fooling around with a strobe light in the dark with long exposures.
27th October 2002
My small, and quite ugly, prototype built using house hold materials.
17th October 2002
A simple demonstration DC motor you can build in 10 minutes with your children.
Contains 1 sub-article.
23rd June 2002
A simple SQL relationship graph generator.
31st August 2001
How I built my parts cabinet for all my electronic components.
Contains 1 sub-article.
24th March 2000
My simple IR modem to let my computer talk to various consumer devices.