There is probably a simple solution...

Projects General Guidance
1

I can't figure out how to connect the LED fade circuit and the circuit to read a button. I need to be able to read the button so the fade effect can be turned on or off and adjusted. I have the code, I just can't make the circuit. Please help.

Edit: here is the code I'm working with.
const int LED = 9;
const int BUTTON = 7;

int val = 0;

int old_val = 0;
int state = 0;

int brightness = 128;
unsigned long startTime = 0;

void setup(){
pinMode(LED, OUTPUT);
pinMode(BUTTON, INPUT);
}

void loop(){

val=digitalRead(BUTTON);

if ((val == HIGH) &&(old_val==LOW)){

state= 1-state;

startTime = millis();

delay(10);
}

if ((val==HIGH) && (old_val == HIGH)) {

if (state == 1 && (millis() - startTime) > 500) {

brightness++;
delay(10);

if (brightness

  1. {
    brightness =0;

}
}
}
old_val = val;

if (state ==1) {
analogWrite(LED, brightness);
}else{
analogWrite(LED, 0);
}
}

This is from Getting Started with Arduino by Massimo Banzi, if that helps.

2

Levitationist7:
I have the code

Feel free to post it so that we have more context in what you are trying to do.

3

When you say 'circuit' do you mean the hardware wiring circuit?

The two devices are wired to the Arduino independently - if you can wire them up individually, what's stopping you from wiring them both up at the same time?

4

Levitationist7:
I just can't make the circuit.

What problem are you having wiring the circuit? Hook up an LED like you would in any of the LED example and a button like you would in any of the button examples.