bonjour a tous
je cherche a controler un driver pwm pour led ( http://www.sureelectronics.net/goods.php?id=1320 )
j'ai testé different code trouvé mais rien ne marche
peut etre moi qui est pas comprit la notice du drivers ^^
voici ce qui est dit dessus
PWM terminal. When applied with +5v or suspended, full amount of current will be output and when connected with ground, output current will be 0.
donc si je comprends bien si je met du 5V la led s'eclaire a fond et si je la met a la masse elle ne s'eclaire pas
et la je voit vraiment pas comment la controler ^^
j'ai pensé a un bete TIP31 mais bon je pense que ya mieux comme transistor pour ca ( et surtout plus petit )
j'ai testé ce code qui peut etre interessant mais comme je m'en douté ne marche pas
//i/o pin declarations
int rpin = 9;
int gpin = 10;
int bpin = 11;
//function prototypes
void solid(int r, int g, int b, int t);
void fade(int r1, int g1, int b1, int r2, int g2, int b2, int t);
void setup()
{
//empty
}
void loop()
{
//colour sequence instructions
//Example sequence one: Rainbow fade over 12 seconds:
solid(255,0,0,1000); // Maintain pure red 1 sec
fade(255,0,0,0,255,0,3000); //fade from red to green over 3 seconds
solid(0,255,0,1000); // Maintain pure green 1 sec
fade(0,255,0,0,0,255,3000); //fade from green to blue over 3 seconds
solid(0,0,255,1000); // Maintain pure blue 1 sec
fade(0,0,255,255,0,0,3000); //fade from blue to red over 3 seconds
}
//function holds RGB values for time t milliseconds
void solid(int r, int g, int b, int t)
{
//map values - arduino is sinking current, not sourcing it
// r = map(r, 0, 255, 255, 0);
// g = map(g, 0, 255, 255, 0);
// b = map(b, 0, 255, 255, 0);
//output
analogWrite(rpin,r);
analogWrite(gpin,g);
analogWrite(bpin,b);
//hold at this colour set for t ms
delay(t);
}
//function fades between two RGB values over fade time period t
//maximum value of fade time = 30 seconds before gradient values
//get too small for floating point math to work? replace floats
//with doubles to remedy this?
void fade(int r1, int g1, int b1, int r2, int g2, int b2, int t)
{
float r_float1, g_float1, b_float1;
float r_float2, g_float2, b_float2;
float grad_r, grad_g, grad_b;
float output_r, output_g, output_b;
//declare integer RGB values as float values
r_float1 = (float) r1;
g_float1 = (float) g1;
b_float1 = (float) b1;
r_float2 = (float) r2;
g_float2 = (float) g2;
b_float2 = (float) b2;
//calculate rates of change of R, G, and B values
grad_r = (r_float2-r_float1)/t;
grad_g = (g_float2-g_float1)/t;
grad_b = (b_float2-b_float1)/t;
//loop round, incrementing time value "i"
for ( float i=0; i<=t; i++ )
{
output_r = r_float1 + grad_r*i;
output_g = g_float1 + grad_g*i;
output_b = b_float1 + grad_b*i;
//map values - arduino is sinking current, not sourcing it
// output_r = map (output_r,0,255,255,0);
// output_g = map (output_g,0,255,255,0);
// output_b = map (output_b,0,255,255,0);
//output
analogWrite(rpin, (int)output_r);
analogWrite(gpin, (int)output_g);
analogWrite(bpin, (int)output_b);
//hold at this colour set for 1ms
delay(1);
}
}
si vous avez une idée pour controler ca je suis preneur
merci beaucoup
j'edit !