Digital read going crazy

Using Arduino Programming Questions
1

First of all,i don't know if this category is the right one and i'm new to arduino.I'm using digital read on push button with my 12V 1A power supply when i plug in the power supply the value is 0 and 1 but when i plug it off the value is what it should be.I hope

2

Your topic was MOVED to its current forum category as it is more suitable than the original

3

Please post uour sketch and a schematic of your project. A 'photo of a pencil and paper drawing is good enough

4

16487238380693520149742147437957
164872383806935201497421474379571920×2560 429 KB 

Const int button = 7;
Const int output_1 = 8;

Int button_value = 0;

Void setup() {

pinMode(button, INPUT);
pinMode(output_1, OUTPUT);
Serial.begin(9600);

}

Void loop() {

button_value = digitalRead(button);
Serial.println(button_value);

if (button_value == 1){
  digitalWrite(output_1, HIGH);
}
else{
digitalWrite(output_1, LOW);
}
}
5

I'd wire that differently, essentially you're leaving that input pin floating.
Wire button one end from the input pin, other end to GND and define it as INPUT_PULLUP instead of INPUT. The button will read LOW when pressed and HIGH when not pressed.

6

Hello
Post a real schematic to see how we can help.

7

It worked,thank you so much

8

Cool!

9

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