User:Mths/sdr ldr

Helmet #1

user with helmet

helmet #1 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

helmet #1 on a table

Circuit

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

a circuit for one vertex

Code

Code for creation of a vertex in OPENSCAD

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();

3d view of a vertex