oscillators are based on simple neon circuits - multivibrator, ring, or relaxation circuits, using voltages in the 60-200 volt range.  some low voltage transistor based circuits based on phase shift or tank circuits are also used, as well as hex schmitt inverter groups.  material components are laboriously prepared by hand - finely shaving endemic woods and layering with copper foil to create capacitor banks - grinding down local dolerite rock into thin translucent slices using diamond lap saws and conductive epoxies to create resistor discs - or collecting vials of tarn and lake water to create comparative resistors.  current experimental trials are using finely sieved sand grains and evaporated lake sludge to create a diy sand-interlayer-capacitors, slicing and aligning the found bone of a tasmanian devil to act as a planar resistor, various iterations of novel oscillator architectures, and tentative trials fusing and forming laboratory glassware….