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, non-Roman alphabets, multiplex lights; PostScript, SVG, PNG and HTML export. Also features batch mode for non-interactive grid filling and grid design space exploration.
  • 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 Fri 5 Jan 10:25:28 GMT 2024
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. New! Release 20200708 for both Linux and Windows. Non-Roman alphabets, batch mode, multiplex lights, answer treatments, circular and hex grids, jumbled entries, lots more besides. More...

You can order my book, ‘Practical Signal Processing’, directly from CUP or via Hive, Amazon UK or Amazon US.
Practical Signal Processing front cover
“Probably the best book on signal processing ever written” — review at Goodreads.
Wydanie polskie.

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