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.
4th February 2010
Adventures in measuring the selectivity of MCU-controlled super-regenerative quartz crystal controlled receivers. Resulting in a very useful selective log power meter.
Parent article: MCU Controlled Super-regeneration with Quartz Oscillators.
23rd January 2010
A low-speed data link implemented using Pierce quartz crystal oscillators controlled by a microcontroller.
Contains 1 sub-article.
4th January 2010
Arcing fault destroys the Rope Light controller.
Parent article: Rope Light Christmas Star.
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.
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.
28th April 2009
I lash up an old Geiger tube and monitor the background radiation in the shack for a while.
1st March 2009
A multiplexed 7-segment digital display for the bolometer.
Parent article: RF and Optical Bolometer.
27th February 2009
A simple hack to interface an ATtiny13's ADC to the PC serial port for data logging.
15th February 2009
A simple wiring pencil for digital circuit prototyping Verowire-style.
Contains 1 sub-article.
14th February 2009
An adapter for my ATtiny13 programmer so it can program ATtiny2313 devices.
Parent article: ATtiny13 Programmer.
5th January 2009
A solid-state emulation of the infamous "dekatron spinner" implemented using a 10-stage discrete ring counter.
2nd January 2009
Using BJTs and LEDs to implement ring counters.
30th December 2008
A simple test circuit for assessing inductor core saturation and measuring inductance as a function of inductor current.
28th December 2008
I try my hand at designing a switchmode power converter for a B+ supply using an Atmel ATtiny13 for the controller.
11th May 2008
A proof-of-concept POV display charlieplexing 6 LEDs.
4th May 2008
A step-counting pedometer which renders the step count as Morse Code for aural consumption.
3rd May 2008
I add a simple xtal clock source to the programmer.
Parent article: ATtiny13 Programmer.
3rd May 2008
A hack to unbrick ATtiny13s that you've stuffed up the fuses of.
20th April 2008
Prototype PSK-31 Beacon Keyer.
Contains 1 sub-article.
19th April 2008
Simple parallel port programmer for the Atmel ATtiny13 (and similar ATtiny AVR range) chips.
Contains 2 sub-articles.
24th December 2007
Thoughts about building cellular automata in hardware.
11th July 2003
Simple little parallel port breakout tool and software.
30th June 2003
A programmer for the AT89Cx051 series of microcontrollers. Uses the PC parallel port.
18th April 2003
A simple parallel port programmer for I2C 8-pin serial EEPROMs (24XX devices). It also works well as a general purpose I2C interface for your PC.
13th April 2003
My ugly implementation of Jens Dyekjær Madsen's PIC programmer.
3rd April 2000
A Linux driver for the Electronics Australia August 1996 Pocket Sampler project.
24th March 2000
My simple IR modem to let my computer talk to various consumer devices.