Christian Liljedahl

Grill Your Darlings

Screaming kids burning toys with a voice controlled flamethrower. Not about destruction, but transformation of mass produced toys through the fire and energy of your screams. A microphone connected to an Arduino board sensing the magnitude of the scream - The Arduino activate a solenoid opening up the gas flow

Floating yule tree

3 days before Christmas in 2010 we decided to put some light out in the harbour. Looking a bit like a yule / Christmas tree. The harbour froze over and the tree had to stay in the water until spring. This was the inspiration to later do the Sailing Yule Tree.

Watertight cable junctions

Working with installations in and under water at illutron, we often need watertight cable connections. Commercial products exist for this - But they are very expensive - And can be hard to get to in rural conditions. We have devised a way to connect cables simple, cheap and reliable using

Simple Rotary Encoder

Using just a small dc-motor and a resistor to make a crude rotary encoder for the Arduino. I came up with a very simple  way to make rotary encoders. I needed a "turn the handle" interface for  an installation. Usually, this can be solved with either a potmeter

Color & Sound - Valve Cluster 1

The 6 handles on the controller box each control a specific light fixture in the ceiling and a simple oscillator. Rotating a handle, you can move either clockwise or counter clockwise around a color palette. As you turn the handle, a simple sine wave oscillator emerges form the box. The

Christian Liljedahl © 2026