Gone to the Canary Islands to explore volcanoes, drink wine and stargaze. It rained all day yesterday. Today was rather better.
Category Archives: experiments
Hellschreiber
What do you get when you mix a cheap MSP430 development board with a simple oscillator circuit and blend in a handful of code from various sources? Hellschreiber– a radio transmission mode invented in the 1920s. The screenshot above shows the signal as transmitted across my bench – a distance of about 50cm. The text …
Game of life
Conway’s Game of Life is a mathematics puzzle / toy / serious bit of research that I mess with from time to time; usually when I get a new computer and want to see how fast it is compared to older ones. I wrote a basic GoL simulation for the Sinclair Spectrum back in the …
Solargraphy 2012
Solagraphy is the art of photographically capturing the path of the sun across the sky. As the sun takes a day to cross the sky, the exposure time for a solargraph is at least a day. To really capture the path of the sun as the seasons change (the sun climbing higher as we …
Playing with ImageMagick
For some Slow Scan TV (SSTV) experiments I want to be able to overlay text on images from the command line or within a script. The Swiss-army-knife of image manipulation is ImageMagick, so I’m using that. Starting with a a photograph I took a few years ago, I resized it to 320×256 pixels – that’s …