arduino用變壓器的問題

zero7386 · 發表於 2012-1-10 16:40:56

各位大大,請問一下,小弟現在用arduino + ethernet shield這兩塊板子,寫一個簡單的hello world網頁,如果我用電腦的usb供電的話,都沒有問題,但如果改變壓器(DC 9V)的話,為什麼都無法動作.想請問是不是有什麼要做設定的?

miaoichi · 發表於 2012-1-10 22:52:19

Arduino獨立電源9v是對的呀，你要不要再多說明一些，這樣很難幫你看問題

mzw2008 · 發表於 2012-1-11 02:40:08

電腦或9V供電是沒差的
但你是否有利用COM跟arduino 通訊
若有那當然不能用囉
電腦那條USB線除了供電以外也理所當然提供了COM連線
若拔掉改9V又要COM, 就得另外有TTL 2 RS232轉板才行

但若沒有使用COM...那就先把照片照來看看吧
理論是不用設定
但可能哪裡錯了
也可能9V那個部份是壞的哩

zero7386 · 發表於 2012-1-11 18:32:54

謝謝樓上的兩位大大的講解。

我現在就只有做這樣簡單的事(#define和include沒打上來,很多)，就如同我上面說的，如果用電腦的usb供電的話，去連這個網頁,看的到字，但如果是用外接電源，則會連不上這個網頁。

void setup()
{
Ethernet.begin(mac, ip, gateway, subnet);
server.begin();
}

void loop()
{
Client client = server.available();

if (client)
{
      while (client.connected())
      {
         if (client.available())
         {
            char c = client.read();
            //read char by char HTTP request
            if (readString.length() < 30)
            {
                  //store characters to string
                  readString += c;
            }//end if (readString.length() < 30)

            //output chars to serial port
            //Serial.print(c);

            //if HTTP request has ended
            if (c == '\n')
            {
                  // now output HTML data starting with standart header
                  client.println("HTTP/1.1 200 OK");
                  client.println("Content-Type: text/html");
                  client.println();
                  client.print("<body>");
                  //想show在網頁上的寫在這---start----
                  client.println("<h1>HTTP test routines</h1>");
                  //想show在網頁上的寫在這---end----
                  client.println("</body></html>");
                  //clearing string for next read
                  readString="";
                  //stopping client
                  client.stop();
            }//end if (c == '\n')

         }//end if (client.available())

      }//end while (client.connected())
}//end if (client)
}

mzw2008 · 發表於 2012-1-11 23:14:27

那這樣我更懷疑9V供電是壞的了

1. 先看9V給電時, 版子電源是否有亮
2. 在看給電後, 板上的5V/3.3V兩隻腳有沒有確實輸出這個電壓

wifi shield 也是從5V取電
也許你版子的電源或是變壓器根本就壞的哩

miaoichi · 發表於 2012-1-11 23:28:41

你可以試燒一下這個範例嗎?

/*
  Web Server

A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.

Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)

created 18 Dec 2009
by David A. Mellis
modified 4 Sep 2010
by Tom Igoe

*/

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup()
{
  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  server.begin();
}

void loop()
{
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
   if (client.available()) {
      char c = client.read();
      // if you've gotten to the end of the line (received a newline
      // character) and the line is blank, the http request has ended,
      // so you can send a reply
      if (c == '\n' && currentLineIsBlank) {
      // send a standard http response header
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println();

      // output the value of each analog input pin
      for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
         client.print("analog input ");
         client.print(analogChannel);
         client.print(" is ");
         client.print(analogRead(analogChannel));
         client.println("<br />");
      }
      break;
      }
      if (c == '\n') {
      // you're starting a new line
      currentLineIsBlank = true;
      }
      else if (c != '\r') {
      // you've gotten a character on the current line
      currentLineIsBlank = false;
      }
   }
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
  }
}

zero7386 · 發表於 2012-1-13 11:15:55

miaoichi大大,用你的code一樣也不能呢.....
mzw2008大大,我想會不會是我的ethernet shield這塊板子有問題?因為我arduino uno有3片,3片都換過,一樣也是不能,看來要來去借ethernet shield這塊板子了

mzw2008 · 發表於 2012-1-13 23:50:06

我的意思是...各個接頭一個一個去試
確認電壓是正確的
輸出的波形也該正確
這樣可以確認到底問題出在哪裡

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