2010- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
2003
Christmas Spam- Mission Accomplished
- Particular Sounds
- Mooving right along
- Going Native
- MUDzilla
- Sitefinder T&C
- Inverness Bridges
- Public Relations
- Old Friend
- Canada
- Larval mode
- Many Moo Menus
- Remote Reboot
- Search Highlighter
- More Chain Reaction
- Java Chain Reaction
- Updates & Upgrades
- Silly Quotes
- Summer Solstice
- No Picnic
- SlashProxy
- Wheel Shapes
- Image to HTML
- Windows Parallel Ports
- SETI@home
- Democratic Bugs
- Political Irony
- Gray Code
- ScotRail
- iPIX
- April Fools
- Signs
- Schrödinger's Cat
- Danger Pay
- Highland Life
- New Math
- Elgin
- Veeblefester
- Triana
- Post Columbia
- Work work work
- First Snow
- 2002
Gray Code
17 April 2003
![[Over-populated circuit board]](/hardware/gray2dir/photo_top1.jpg)
Converting the
sin/cos bits from a pair of optical encoders into pulse/direction bits
sounds like, well, a two-bit problem. It turns out that this is
surprisingly complex. Here's the solution I designed and built seven
years ago. I've reanalysed it, and it still seems to be the best
possible solution using discrete logic. However I'm now exploring a
couple of other options which weren't available in '96...
