Oct 242011
 

It’s hard to resist the bargain bin – found an alarm clock module.
Now it has extensions for alarm control plus a radio power supply and FM stereo converter. Still in use today!

Alarm clock

Bargain bin alarm clock - with addons

I designed and built an archery sight for blind people – electronics worked, but the optics failed :(
I really wished I could use an FPGA for this project, but the cost was in the thousands of dollars! I should have used a PIC – but the idea never entered my mind – that was a “computer” – not a logic controller! In the end I moved all my logic into an EPROM.

Archery sight transmitter

Archery sight transmitter

Archery sight receiver

Archery sight receiver

I bravely promised a friend it would be much cheaper and better to build a kit metal detector for some serious detecting. I tried two different kits – both were total failures with my build – sorry Dave :(

Metal detector - Electronics Australia

Metal detector - Electronics Australia

Metal detector - Elektor

Metal detector - Elektor

Oct 182011
 

Way back before I had a ‘real’ job I explored lots of stuff.

The workbench with several projects:

Old WorkBench and some projects

Old WorkBench and some projects

On the left in front of that monitor (orange monochrome!) is a built from scratch MicroBee computer.

It’s predecessor is in the 19inch rack box second from the right. This started life as home design Z80 computer with own BIOS (hand entered via switch bank, then via keyboard), then it transformed into an S100 bus system, and then a MicroBee computer was built onto one S100 board!

Back right is my own design linear power supply 0-20V and variable current limit. There is some test gear – custom built function generator so many addons – can’t remember, and a kit frequency counter, Forth kit computer, scavenged printer board, custom Nicad battery charger.