Two Poems by Heinz Erhardt
Two Poems by Heinz Erhardt
Category: fun
micro:bit plays Bach
I dedicate this post to one of my favorite composers, Johann Sebastian Bach. I was walking through Paris years ago when I approached a cathedral where someone had played this piece. It is the fugue of the Bach Toccata, BWV 565. At first, I thought that a virtuos organist must be at work here. Only… Read more micro:bit plays Bach
The Tennis Court Problem (TCP)
I owe this task to Ruedi, a regular tennis player. The Tennis Court Problem (TCP) is about the following task. At the beginning of outdoor tennis, the court lines must always be cleaned first. The sweeping set is often placed in one of two typical locations, usually either on one side of the net or… Read more The Tennis Court Problem (TCP)
Neopixels with micro:bit
In this post I will demonstrate a “Hello, World!” example for the micro:bit to light up some Neopixels. Neopixels are individually-addressable RGB LEDs and can come in various forms. The most common form is the chain having all units connected serially. It was invented by Adafruit, an open-source hardware company based in New York City. Why did I… Read more Neopixels with micro:bit
Happy Birthday Duino
In this post I’ll show you the simplest setup to generate synthetic sound using an Arduino Pro Mini. Of course you can also run it on a Leonardo or on an Arduino UNO R3. The project is inspired from a project from the official arduino project hub and you can get the sourcecode here. What… Read more Happy Birthday Duino
An Arduino based Math Trainer
In this post I’ll show you how to build an arduino based math training console based on simple standard components. The app is suitable for training math in lower and middle school. It allows configuring difficulty level as well as operations and lets the player choose the correct result from a selection of 4 outcomes… Read more An Arduino based Math Trainer
Ode to a Legend of the Eighties – The Commodore 64
It was the machine one wanted to own as a boy back in the eigthies, long before the Amiga had been acquired by Commodore Inc. – the Commodore 64. At that time, PCs were presenting monochrome character-art pictures, games had to be played using the cursor keys and from time to time one could hear… Read more Ode to a Legend of the Eighties – The Commodore 64
A Sudoku Solver in a few Lines of Code – Or the Power of Recursive Programming
In this post I want to demonstrate the power of recursive programming by programming a sudoku solver in Python. The complete sourcecode can also be downloaded here. Although I like solving Sudokus by hand, I’m far away from being a professional Sudoku solver. Usually I get the medium-ones solved, however, since I always want to… Read more A Sudoku Solver in a few Lines of Code – Or the Power of Recursive Programming
Fun with Mandelbrot
I’ve always been intrigued by the Mandelbrot set and the nice images one can render with just that simple recursive formula z=z2 + c. Back in the eighties I rendered images in 320×200 pixels on my Commodore 64, then on my Amiga 500, later on a Macintosh and finally on my subsequent PCs. Where I… Read more Fun with Mandelbrot
Font Design for Raspberry Marquee Project
Since the 8×8 LED Matrix Display I used in my marquee project is able to display 8×8 pixel sized letters and I am a great fan of the old Commodore 64 I designed the the font according to the C64 charset visible here: Based on the hardware reference provided here you can get the information… Read more Font Design for Raspberry Marquee Project