I lost the computer I programmed my Uno with. I would like to download the scheme to a new computer but I find no way to do that. Help!

Sorry Frank

My suggestion is to try to recover the sketch that might be in the temp directories.

The sketch is compiled and then uploaded using the boot loader into the UNO.

Even if you could recover it as a hex file, it won't give you the code back.

Lesson here is backup regularily.

I tend save before uploading and to prefix the file name with date_time for my projects as I develop them.

Mark

Thanks Mark. I took the HD from the old Laptop and copied into this one. It worked. I am planning to add a 10 second timer and some way of resetting. I am writing a Jeopardy log-in simulator for our radio club. I am having little luck finding what I need. I programmed in Basic years ago but nothing since.

Good news

re Timer

I'd have a look at Millis().

I would store the start time    startTime = Millis() , then come back and see If (Millis() - stored Millis >= 600000)      ((always subtract to ensure rollover works correctly)

You can always set a flag when your timing TimerRunning = true, and cancel it by changing it to false.

I often draw these out, and don't worry about the code, just the flow

mark

int button1 = 0;

int button2 = 0;

int button3 = 0;

int button4 = 0;

int chuck = 1;

void setup() {

  // put your setup code here, to run once:

pinMode(13, OUTPUT);

pinMode(5, OUTPUT);

pinMode(6, OUTPUT);

pinMode(7, OUTPUT);

pinMode(8, OUTPUT);

pinMode(9, INPUT);

pinMode(10, INPUT);

pinMode(11, INPUT);

pinMode(12, INPUT);}

void loop() {

  // put your main code here, to run repeatedly:

  digitalWrite(9, HIGH);

  digitalWrite(10, HIGH);

  digitalWrite(11, HIGH);

  digitalWrite(12, HIGH);

  digitalWrite(5, HIGH);

  delay (200);

  digitalWrite(5, LOW);

  delay (200);

  digitalWrite(6, HIGH);

  delay (200);

  digitalWrite(6, LOW);

  delay (200);

  digitalWrite(7, HIGH);

  delay (200);

  digitalWrite(7, LOW);

  delay (200);

  digitalWrite(8, HIGH);

  delay (200);

  digitalWrite(8, LOW);

  delay (200);

  while (chuck = 1){

   button1 = digitalRead(9);

   button2 = digitalRead(10);

   button3 = digitalRead(11);

   button4 = digitalRead(12);

   if(button1 == LOW){

   digitalWrite(5, HIGH);

   while(1) {

}

}//set theLED on

if(button2 == LOW){

   digitalWrite(6, HIGH);

   while(1) {

}

}//set theLED on

if(button3 == LOW){

   digitalWrite(7, HIGH);

   while(1) {

}

}//set the LED on

if(button4 == LOW){

  digitalWrite(8, HIGH);

  while(1) {

}

}//set the LED on

}

}

This is the code that works. I would like to include a ten second timer when any button is pressed that would turn off the indicator light and reset to give the other contestants a chance to answer. I do this now manually, but at times I forget to reset. Again, thanks for your help. Now my 72 year old sieve I call my brain must just remember how to program.