Welcome to quinapalus.com

  • The Wireworld computer: the first ever computer implemented as a cellular automaton that you might reasonably want to write a program for. Includes program to calculate primes.
  • PICs in Space: the classic ‘Space Invaders’ game using a PIC16F628 plus just a couple of external passive components. Direct audio and video output to a SCART socket.
  • Logic Tutor: an educational toy that lets you quickly experiment with simple digital logic circuits. Creative Commons licence.
  • Goom: a polyphonic, polytimbral digital synthesiser with analogue-style knobs, implemented in a tiny microcontroller. Source code released under the GPL.
  • PIC Blitz: a tiny, low-power, ultra-low-cost device that plays lightning chess. Source code released under the GPL.
  • Splatts: a puzzle akin to the Soma Cube, based on tessellating truncated octahedra.
  • HD44780 LCD graphics: design graphics for character LCDs that use this popular controller. With large library of example patterns.

  • Linux/Windows crossword constructor: free (GPL) program to help you create and publish crosswords. With automatic and interactive fill, rules check, statistics, circular and hex grids, customisable answer treatments; PostScript, SVG, PNG and HTML export.
  • Grid filler: free general constraint satisfaction program for word puzzles. Fills grids of any topology including Möbius strips and cubes.

E-mail:  mail at quinapalus dot com

This page most recently updated Thu Aug 7 12:10:28 BST 2014
Word Matcher

Type a pattern, e.g.
into the box and click ‘Go!’ to see a list of matching words. More...

Qxw screen
Qxw is a free (GPL) crossword construction program. Answer treatments, circular and hex grids, jumbled entries, more besides. New release 20140331 for both Linux and Windows. More...

Practical Signal Processing front cover
My book, ‘Practical Signal Processing’, is published by Cambridge University Press. You can order it directly from them, or via amazon.co.uk or amazon.com. Paperback edition now also available. Browse before you buy at Google Books. Wydanie polskie.

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