LED not turning off completely

-

hey guys!
sorry if not right place im having little problem controling led
here code..... see video below preview on whats going on.....
code: [select]

#include <spi.h>
#include <ethernet.h>

int led = 8;
string post = "";
string set = "";

// enter mac address , ip address controller below.
// ip address dependent on local network:
byte mac[] = {
 0xde, 0xad, 0xbe, 0xef, 0xfe, 0xed };
ipaddress ip(192,168,5,177);

// initialize ethernet server library
// ip address , port want use
// (port 80 default http):
ethernetserver server(105);

void setup() {
// open serial communications , wait port open:
 serial.begin(9600);
  while (!serial) {
   ; // wait serial port connect. needed leonardo only
 }


 // start ethernet connection , server:
 ethernet.begin(mac, ip);
 server.begin();
 serial.print("server @ ");
 serial.println(ethernet.localip());
 pinmode(led, output);
}


void loop() {
 // listen incoming clients
 ethernetclient client = server.available();
 digitalwrite(led, high);
 if (client) {
   serial.println("new client");
   // http request ends blank line
   boolean currentlineisblank = true;
   while (client.connected()) {
     if (client.available()) {
       char c = client.read();
       serial.write(c);
       // if you've gotten end of line (received newline
       // character) , line blank, http request has ended,
       // can send reply
       if (c == '\n' && currentlineisblank) {
         // after double cr-lf variables are
         // read line!
         string post = "";
         while(client.available())
         {
           c = client.read();
           // save variables somewhere
           post += c;
         }
         if(post != "")
         {
           if(post == "led=1"){
             set = "on";
             serial.println("on");
           }else{
             set = "off";
             serial.println("off");
           }
         }
         // send standard http response header
         client.println("http/1.1 200 ok");
         client.println("content-type: text/html");
         client.println("connnection: close");
         client.println();
         client.println("<!doctype html>");
         client.println("<html><head><title>led control</title>");
         client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />");
         client.println("<link href='http://fonts.googleapis.com/css?family=fjord+one' rel='stylesheet' type='text/css'>");
         client.println("<style>*{font-family:'fjord one';}body{background-color:#f2f2f2;}h1{color:#222;}</style>");
         client.println("</head><body><h1>led control</h1>");
         client.print("<form method='post'>");
         client.print("<input type=\"radio\" name=\"led\" value=\"0\" onclick=\"this.form.submit()\"");
       
         if(set != "on"){
          client.print(" checked");
         }
       
         client.print(">off<br />");
         client.print("<input type=\"radio\" name=\"led\" value=\"1\" onclick=\"this.form.submit()\"");
       
         if(set == "on"){
          client.print(" checked");
         }
       
         client.print(">on<br />");
         client.print("</form>");
         client.println("</body></html>");
         break;
       }
       if (c == '\n') {
         // you're starting new line
         currentlineisblank = true;
       }
       else if (c != '\r') {
         // you've gotten character on current line
         currentlineisblank = false;
       }
     }
   }
   // give web browser time receive data
   delay(1);
   // close connection:
   client.stop();
   serial.println("client disonnected");
 }

 if(set == "on"){
   digitalwrite(led, high);
 }else{
   digitalwrite(led, low);
 }
}

https://www.youtube.com/watch?v=grdnrupxzbe

hey kelly,
can send me schematic? know sounds silly let's make sure led being driven properly. happening on 1 end you're driving high side digital pin , on other have floating point voltage, not ground.

other printing make sure hit 'digitalwrite(pin,low)' , if do, put delay in there, see if changes anything.. maybe you're popping out of logic , writing high. though suspect it's former, not latter.

cheers!


Arduino Forum > Using Arduino > LEDs and Multiplexing > LED not turning off completely


arduino

Comments

Post a Comment

Popular posts from this blog

VIDIOC_S_FMT error 16, Device or resource busy - Raspberry Pi Forums

-
dear all, working on image processing using raspberry pi, have installed intex usb web camera on raspberry pi. have used basic python script of image processing https://www.cl.cam.ac.uk/projects/raspb ... first.html required libraries installed on raspberry pi. script code: import imgproc imgproc import * # open webcam take pictures camera = camera(160, 120) # open viewer window display images viewer = viewer(160, 120, "the first step") # take picture camera img = camera.grabimage() # display image in viewer viewer.displayimage(img) # iterate on each pixel in image x in range(0, img.width): for y in range(0, img.height): # value @ xth column , yth row, place intensities variables red, green, blue = img[x, y] # test find colour dominant if red > green , red > blue: # red dominant, set pixel red img[x, y] = 255, 0, 0 elif green > red , green > blue: img[x, y] = 0, 255, 0 else: # if red or gr...
Read more

using a laptop skeleton to build a pi laptop - Raspberry Pi Forums

-
Image
i have laptop dead motherboard . can remove components laptop , in anyway possible connect raspberry pi inbuilt display , keyboard on laptop ? (and touchpad if possible). (i figured remove components inside , fix pie inside , use extended usb cable , connect available usb ports respective holes in laptop skeleton, same headphone out ) . i'm noob when comes pi . on topic appreciated if screen lvds type may possible use screen installing converter board. this: http://www.ebay.com/itm/hdmi-dvi-vga-dr ... 3027&rt=nc need model number of screen , ask seller if work. or search ebay using brand , model number. assuming screen in working order..... back-light not burnt out etc.. other devices...... can used if have usb interface not part of motherboard. have make connector. raspberrypi
Read more

Smoothing Capacitor value?

-
Image
hi everyone! i have question "smoothing capacitors". have 5v arduino project have 6 individual 5v components attached it. since need these running @ different times, wanted take similar approach of nick gammon's in helpful example (http://www.gammon.com.au/forum/?id=12106) , use few mosfets switch these little guys on & off individually (instead of regular arduino pins), while minimizing potential power surges affect microcontroller and/or components themselves. these components 5v, , have maximum draw of ~170ma when powered on @ same time. so, if used 6 different mosfet switches turn switch +5v power line on each component directed via arduino uno, wondering: 1. still use 1 capacitor (like nick did in example)? 2. capacitor of 100uf work, or should use bigger? my plan first test circuit mosfets & capacitor(s) using usb, , later on, moving project battery power. thanks in advance ideas & suggestions! quote these little guys what ...
Read more