All projects

Arbitrage | Brainfuck | Furbie | Lego cat | PSP | Scripts | Sites

Arbitrage

"In economics and finance, arbitrage (IPA: /ˈɑrbɨtrɑːʒ/) is the practice of taking advantage of a price difference between two or more markets" [Wikipedia].

This script takes as input the bid and ask for different commodoties (e.g. currencies) and displays any loop holes found. In this case, it also displays an adjusted solution that does not have any loop holes.

There are also some sample inputs available.

Brainfuck

Back in 2002 I wrote a tutorial for this esoteric programming language. Also check out Brainfuck quines.

Furbie

Furbie is a Dutch chat bot that can tell you the local weather, show (current) TV programs, make simple calculations, keep track of a to-do list, remind you of upcoming events (user-defined) and much more. To find out more, and for Furbie's source code, visit Furbie's site.

Lego cat

For my then girlfriend's (now wife ;) birthday I made a Lego model of our cat:

Cat

You can also download the LEGO Digital Designer source or check out how the final result looks.

PSP

Map This!

Some years ago I spent some time on improving Map This!, a homebrew GPS program for the Sony PSP. Since Go!Explore hadn't come out, Map This! was the only proper option available. Some of the improvements I made include: GPS trail recording, smart zooming and auto map selection (based on current position). You can find Map This! on the downloads page.

I also wrote a small frontend for Google Maps, so you can download routes in Map This! format, and I parsed the Dutch geodata for use in Map This!.

MP3 streaming tutorial (RSS)

This tutorial explains how to stream music from a web server to your PSP using RSS.

The order of RSS feeds cannot be changed on the PSP itself. You can use the PSP RSS Sort script instead. Source available.

PSP Guitar

PSP Guitar is a guitar synthesizer that supports notes from octave 2 till 6 (inclusive), with support for flat (♭) and sharp (♯) notes. The key bindings are as follows:

It also shows a visualization of the sound waves.

PSP Tone Generator

PSP Tone Generator can create up till five simultaneous tones ranging from 20Hz to 10kHz. It also shows a visualization of the sound waves.

Version 0.2 supports only three tones, but has a higher range (20Hz to 20kHz) and tighter timing, resulting in better quality at high frequency ranges.

Version 0.3 supports different frequencies for the left and right output channel and includes support for fine-tuning the frequency by holding the square button.

Video converter script

I regularly watch movies/series on the TV through my PSP. I use a converter script to convert any file ffmpeg can read, to the one and only proper format the PSP will read: H.264/MPEG-4 AVC video (level 2.1), AAC audio. The script requires ffmpeg and Perl to work.

There is also an iPhone version and an FLV version available.

Scripts

Barcode creator

This script generates barcodes from numbers. Source available.

MooTabs 1.3

MooTabs 1.3 is the updated version of MooTabs. It works with MooTools 1.3.

Russian sentence generator

Practice Russian verbs of motion, translations are in Dutch. Source available (SQL).

Web toolkit

Small toolkit for often-used web functions.

Sites

I made the following websites, mainly for family members: