The Arduino UNO broken?

[shanren]

Hi,
I am testing a IR phototransistor as picture and code below, the UNO board got 3 red lights on in just a sudden and PC stay and nothing work, this is the second one, what can be wrong?
Thanks for help.
Adam

const int T1=0;
const int T2=1;
const int T3=2;
const int T4=3;

void setup(){
  
      Serial.begin(9600);
     Serial.println("xxx_setup!");
  Serial.print("File   : "), Serial.println(__FILE__);
  Serial.print("Date   : "), Serial.println(__DATE__);

 
}//end setup

void loop(){
  Serial.print(" ");
  Serial.print(analogRead(T1));
  Serial.print(" ");
  Serial.print(analogRead(T2));
  Serial.print(" ");
  Serial.print(analogRead(T3));
  Serial.print(" ");
  Serial.print(analogRead(T4));
  Serial.print("\n");
  delay(10);
}//end loop

ERROR:

Arduino: 1.8.16 (Windows 7), Board: "Arduino Nano, ATmega328P"

Sketch uses 2316 bytes (7%) of program storage space. Maximum is 30720 bytes.

Global variables use 358 bytes (17%) of dynamic memory, leaving 1690 bytes for local variables. Maximum is 2048 bytes.

C:\Users\HUA.DELLV-PC\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude -CC:\Users\HUA.DELLV-PC\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf -v -patmega328p -carduino -PCOM3 -b115200 -D -Uflash:w:C:\Users\HUA~1.DEL\AppData\Local\Temp\arduino_build_555873/IR_reader_M.ino.hex:i 



avrdude: Version 6.3-20190619

         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

         Copyright (c) 2007-2014 Joerg Wunsch



         System wide configuration file is "C:\Users\HUA.DELLV-PC\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"



         Using Port                    : COM3

         Using Programmer              : arduino

         Overriding Baud Rate          : 115200

avrdude: ser_open(): can't open device "\\.\COM3": The system cannot find the file specified.






avrdude done.  Thank you.



Problem uploading to board.  See https://support.arduino.cc/hc/en-us/sections/360003198300 for suggestions.



This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

[TomGeorge]

Hi,
I ran your code and it loaded fine on a Nano.
Can you upload the "Blink without delay" example?
I have formatted your code and edited the analog int variables.

const int T1 = A0;
const int T2 = A1;
const int T3 = A2;
const int T4 = A3;

void setup()
{
  Serial.begin(9600);
  Serial.println("xxx_setup!");
  Serial.print("File   : "), Serial.println(__FILE__);
  Serial.print("Date   : "), Serial.println(__DATE__);
}//end setup

void loop()
{
  Serial.print(" ");
  Serial.print(analogRead(T1));
  Serial.print(" ");
  Serial.print(analogRead(T2));
  Serial.print(" ");
  Serial.print(analogRead(T3));
  Serial.print(" ");
  Serial.print(analogRead(T4));
  Serial.print("\n");
  delay(10);
}//end loop

Have you loaded code to that Nano before?
If not then try selecting old bootloader;

Tom...

[hammy]

That 47 ohm resistor is too low and may have damaged the UNO or at least pulled the power supply low .
Disconnect everything and try to upload the example blink program to see if you UNO is ok .

[missdrew]

Turn of the PC & restart it, you should then get access!

[shanren]

Great!
it works.