Hi everyone,
Here is my small project description: Use 3 buttons to toggle 2 LED's (Green and Yellow) in the following sequence: (at start no LED is lit) press button 1 to turn on the Green LED, press button 2 to turn on the Yellow LED and turn off the Green LED, when the button 3 is pressed will turn off all the LED's regardless witch one is lit.
Parts used: a controller (Trinket 5v from ADA) 2 LED's (each with 330 Ohm resistor) and 3 buttons (each with 1kOhm resistor on negative)
Since I am not a programmer at all but playing with Arduino here is only the pseudo code I have from various sources on internet:
const int LED1=0;
const int LED2=1;
const int Buttton1=2;
const int Buttton2=3;
const int Buttton3=4;
boolean state = true; // declare variable state as boolean
int val=0;
void setup()
{
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(Button1,INPUT);
pinMode(Button2,INPUT);
pinMode(Button3,INPUT);
}
void loop()
{
val=digitalRead(Button1);
delay(100); // Software debouncing
if(val==HIGH)
{state=!state; // Complimenting the status of LED
digitalWrite(LED1,state);
digitalWrite(LED2,!state);
}
}
Any help on the code will be appreciated, thanks!
Catalin Anesia
Thanks,
I still do something wrong for sure since I is not everything clear in my head but this is what I put together further:
const int LED1=0;
const int LED2=1;
const int Buttton1=2;
const int Buttton2=3;
const int Buttton3=4;
boolean state1 = true; // declare variable state1 for button1 as boolean
boolean state2 = true; // declare variable state2 for button2 as boolean
boolean state2 = true; // declare variable state3 for button3 as boolean
int val1=0; // button1
int val2=0; // button2
int val3=0; // button3
void setup()
{
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(Button1,INPUT);
pinMode(Button2,INPUT);
pinMode(Button3,INPUT);
}
void loop()
{
val1=digitalRead(Button1);
delay(100); // Software debouncing
if(val1==HIGH)
{state1=!state1; // Complimenting the status of LED
digitalWrite(LED1,state1);
digitalWrite(LED2,!state1);
{
val2=digitalRead(Button2);
delay(100); // Software debouncing
if(val2==HIGH)
{state2=!state2; // Complimenting the status of LED
digitalWrite(LED1,state1);
digitalWrite(LED2,!state2);
}
{
val3=digitalRead(Button3);
delay(100); // Software debouncing
if(val3==HIGH)
{state3=!state3; // Complimenting the status of LED
digitalWrite(LED1,state3);
digitalWrite(LED2,!state3);
}
}
}
}
const byte Led1=0;
const byte Led2=1;
const byte Buttton1=2;
const byte Buttton2=3;
const byte Buttton3=4;
byte state = 0; // state of leds, 0 = off, 1 = Led1, 2 = Led2
void setup()
{
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(Button1,INPUT);
pinMode(Button2,INPUT);
pinMode(Button3,INPUT);
}
void loop()
{
//read the buttons
if(digitalRead(Button1)){
state = 1;
}
else if(digitalRead(Button2)){
state = 2;
}
else if(digitalRead(Button3)){
state = 0;
}
//set the leds
digitalWrite(Led1, state == 1);
digitalWrite(Led2, state == 2);
}
I don't know about the Trinket but pin0 and pin1 are used for serial on a Arduino Uno/Nano/Mega etc
You can leave out the pull down resistors if you want. Just place the switch between the pin and GND (instead of the pin and 5V like you have now) and enable the internal pullups. (Think the Trinket has them as well.) Only thing is, the button now reads high when not pressed and low when pressed, so inverted. But that's an easy fix
const byte Led1=0;
const byte Led2=1;
const byte Buttton1=2;
const byte Buttton2=3;
const byte Buttton3=4;
byte state = 0; // state of leds, 0 = off, 1 = Led1, 2 = Led2
void setup()
{
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(Button1,INPUT_PULLUP);
pinMode(Button2,INPUT_PULLUP);
pinMode(Button3,INPUT_PULLUP);
}
void loop()
{
//read the buttons
if(!digitalRead(Button1)){
state = 1;
}
else if(!digitalRead(Button2)){
state = 2;
}
else if(!digitalRead(Button3)){
state = 0;
}
//set the leds
digitalWrite(Led1, state == 1);
digitalWrite(Led2, state == 2);
}
Thank you both!
I do the reading regarding the arrays right now since I do not have the hardware with me at this time to actually do the code run and see the marvell ...
Ill keep you posted later on the night ...
Thanks!
PS. do I need to rewire and remove my resistors to make your code work? or I can keep the wiring as is?
catalinanesia:
Thank you both!
I do the reading regarding the arrays right now since I do not have the hardware with me at this time to actually do the code run and see the marvell …
Hi again,
I am simulating on 123D Circuits but unfortunately I do have the following errors:
In function 'void setup()':
13:11: error: 'LED1' was not declared in this scope
14:11: error: 'LED2' was not declared in this scope
15:11: error: 'Button1' was not declared in this scope
16:11: error: 'Button2' was not declared in this scope
17:11: error: 'Button3' was not declared in this scope
In function 'void loop()':
23:19: error: 'Button1' was not declared in this scope
26:24: error: 'Button2' was not declared in this scope
29:24: error: 'Button3' was not declared in this scope
And here is the code set up on Arduino Uno R3 in 123D circuits:
const byte Led1=2;
const byte Led2=3;
const byte Buttton1=4;
const byte Buttton2=5;
const byte Buttton3=6;
byte state = 0; // state of leds, 0 = off, 1 = Led1, 2 = Led2
void setup()
{
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(Button1,INPUT_PULLUP);
pinMode(Button2,INPUT_PULLUP);
pinMode(Button3,INPUT_PULLUP);
}
void loop()
{
//read the buttons
if(!digitalRead(Button1)){
state = 1;
}
else if(!digitalRead(Button2)){
state = 2;
}
else if(!digitalRead(Button3)){
state = 0;
}
//set the leds
digitalWrite(Led1, state == 1);
digitalWrite(Led2, state == 2);
}
See 
