User:Mths/sdr ldr

Helmet #1

the helmet no1 is a surround light to sound converting apparatus,
that plays with the spatial perception of the user. 11 speakers are
mounted on a grid, with the form of a icosahedron, around the head.
on each vertex of the structure is a small oscillator circuit attached
that converts with ldrs light into sound.

video

user with helmet

helmet #1 on a table

Reverse bias Oscillator. Only a battery, one capacitor, one transistor, one lightresistor and a small speaker are necessary.

a circuit for one vertex

3d view of a vertex

Code for creation of a vertex in OPENSCAD <source lang="javascript"> hoehe2 = 18; hoehe = -8; abstand = 10; laengestab = 10; wert = 200; winkel = 58.2; //31,8 //69.1

module test001() { union() { difference() { union() { cylinder(r = 20,h = 13, center = true,$fn=wert); rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 7, h = laengestab, center = true,$fn=wert); rotate(72, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 7, h = laengestab, center = true,$fn=wert); rotate(144, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 7, h = laengestab, center = true,$fn=wert); rotate(216, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 7, h = laengestab, center = true,$fn=wert); rotate(288, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 7, h = laengestab, center = true,$fn=wert); } union() { translate([0,0,2]) rotate(90, [0, 0, 0]) cylinder(r = 11.1, h = 9, center = true,$fn=wert); rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 3.25, h = laengestab, center = true,$fn=wert); rotate(72, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 3.25, h = laengestab, center = true,$fn=wert); rotate(144, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 3.25, h = laengestab, center = true,$fn=wert); rotate(216, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 3.25, h = laengestab, center = true,$fn=wert); rotate(288, [0, 0, 1]) rotate(winkel, [1, 0, 0]) translate([0,hoehe,hoehe2]) cylinder(r = 3.25, h = laengestab, center = true,$fn=wert); } } } }

test001();

</source