I'm not going to be an artist (you can probably guess where I'm going after reading the rest of my entry)
Here's my entry. I'm going to upload a video of it soon(because it also spins).
(it looks like the forum isn't letting me post pictures)
How did I do it? My oscilloscope has an X-Y feature, so I took a picture of the Bitcoin logo and resized it to 32x32. Then I built a simple 5-bit digital to analog converter out of a couple of resistors. Then, I took all the coordinates on my 32x32 picture and I had the Arduino send them to the DAC. Here's the code for it if you want to try it yourself.
#define x1 12
#define x2 11
#define x4 10
#define x8 9
#define x16 8
#define y1 6
#define y2 5
#define y4 4
#define y8 3
#define y16 2
int spin(double deg, int orig){
return (int)(15.5+(orig-15.5)*sin(deg));
}
void drawCircle(double x){
int delayus = 20;
int numPoints = 31;
int xcoord[] = {0 ,0 ,1 ,1 ,1 ,1 ,1 ,1 ,2 ,2 ,2 ,3 ,3 ,4 ,4 ,5 ,5 ,6 ,6 ,7 ,7 ,8 ,9 ,9 ,10,11,12,13,13,14,15};
int ycoord[] = {15,16,16,17,18,19,20,21,21,22,23,23,24,24,25,25,26,26,27,27,28,28,28,29,29,29,29,29,30,30,30};
for (int i = 0; i<numPoints; i++){
setXY(spin(x,xcoord[i]), ycoord[i]);
delayMicroseconds(delayus);
}
for (int i = numPoints-1; i>=0; i--){
setXY(spin(x,31-xcoord[i]), ycoord[i]);
delayMicroseconds(delayus);
}
for (int i = 0; i<numPoints; i++){
setXY(spin(x,31-xcoord[i]), 30-ycoord[i]);
delayMicroseconds(delayus);
} for (int i = numPoints-1; i>=0; i--){
setXY(spin(x,xcoord[i]), 30-ycoord[i]);
delayMicroseconds(delayus);
}
}
void drawBOuter(double x){
int delayus = 20;
int numPoints = 100;
int xcoord[] = {8 ,9 ,10,11,11,11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10 ,10,9 ,8 ,8 ,9 ,10,11,12,12,12,12,13,14,14,14,14,15,16,16,16,16,17,17,17, 17,18, 19, 19, 20,21,22,22,23,23,23,23,22,22,21,21,21,22,23,23,24,24,24,24,24,23,23,22,22,21,20,19,18,17,17,17,17,17,16,16,16,16,16,15,14,14,14,14,14,13,12,12,12,12,12,11,10,9,8};
int ycoord[] = {8 ,8 ,8 ,8 ,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 20, 21,21,21,22,22,22,22,22,23,24,25,25,25,24,23,22,22,22,23,24,25,25,24,23, 22,22, 22, 21, 21,21,21,20,20,19,18,17,17,16,16,15,14,14,14,13,13,12,11,10,9 ,9 ,8 ,8 ,7 ,7 ,7 ,7 ,7 ,7 ,6 ,5 ,4 ,3 ,3 ,4 ,5 ,6 ,7 ,7 ,7 ,6 ,5 ,4 ,3 ,3 ,3 ,4 ,5 ,6 ,7 ,7 ,7 ,7,7};
for (int i = 0; i<numPoints; i++){
setXY(spin(x,xcoord[i]), ycoord[i]);
delayMicroseconds(delayus);
}
}
void drawBUpperInner(double x){
int delayus = 20;
int numPoints = 22;
int xcoord[] = {14,15,16,17,18,19, 19, 20,20 , 20, 20, 19, 19, 18 ,17,16,15,14,14,14,14,14};
int ycoord[] = {15,15,15,15,15,15, 16, 16, 17, 18, 19, 19, 20, 20, 20,20,20,20,19,18,17,16};
for (int i = 0; i<numPoints; i++){
setXY(spin(x,xcoord[i]), ycoord[i]);
delayMicroseconds(delayus);
}
}
void drawBLowerInner(double x){
int delayus = 20;
int numPoints = 26;
int xcoord[] = {14,15,16,17,18,19, 19, 20,20, 21, 21, 21, 21, 20, 19, 19, 18 ,17,16,15,14,14,14,14,14,14};
int ycoord[] = {8 ,8 ,8 ,8 ,8 ,8 , 9 , 9, 10, 10, 11, 12, 13, 13, 13, 14, 14, 14,14,14,14,13,12,11,10,9};
for (int i = 0; i<numPoints; i++){
setXY(spin(x,xcoord[i]), ycoord[i]);
delayMicroseconds(delayus);
}
}
void setXY(int x, int y){
digitalWrite(x1, x%2);
x=x>>1;
digitalWrite(x2, x%2);
x=x>>1;
digitalWrite(x4, x%2);
x=x>>1;
digitalWrite(x8, x%2);
x=x>>1;
digitalWrite(x16, x%2);
digitalWrite(y1, y%2);
y=y>>1;
digitalWrite(y2, y%2);
y=y>>1;
digitalWrite(y4, y%2);
y=y>>1;
digitalWrite(y8, y%2);
y=y>>1;
digitalWrite(y16, y%2);
}
void setup() {
pinMode(x1, OUTPUT);
pinMode(x2, OUTPUT);
pinMode(x4, OUTPUT);
pinMode(x8, OUTPUT);
pinMode(x16, OUTPUT);
pinMode(y1, OUTPUT);
pinMode(y2, OUTPUT);
pinMode(y4, OUTPUT);
pinMode(y8, OUTPUT);
pinMode(y16, OUTPUT);
}
double x = 3.14/2;
void loop() {
drawCircle(x);
drawBOuter(x);
drawBUpperInner(x);
drawBLowerInner(x);
x=x+0.03;
}
The circuit can be found here. It's basically two R2R ladders and an Arduino:
Here's my bitcoin address: 3LGFCYRgpqsJXdUjvn5AHhvEetb726YrgL
If this gets 10 merits I'm drawing more stuff.
Edit: That was quick. What should I draw next?
https://www.youtube.com/watch?v=FoGXVam3CNUHere's the video (it's not very good quality because I took it with my phone)
Edit 2: I'll have the other drawing done this week.
Edit 3: Done, go to page 32.
