Hey guys, I've just got my Arduino Uno R3 a few days ago and began playing with it. javascript:void(0);
One of my first projects I've created was a 7 segment display (from RadioShack) with two buttons: one that increases the digit by one and the other decreases it by one.
I then found a turtorial on programming an Attiny micro microcontroller which really got my attention. I then ordered two Attiny85's and one Attiny84 for just 3.04$ from http://www.newark.com !! 
So I started messing around with these little fellows and then decided to implement one of the chips (particulary the Attiny84 because it has 10 functional pins compared to 5 pins in Attiny85 ) in my segment display project! 8)
What I used:
- Arduino Uno
- ATTiny84 (8KB Flash, 1KB RAM, 14Pins (10 Functional)) 2.13 $
http://www.newark.com/atmel/attiny84-20pu/ic-8bit-mcu-avr-tiny-20mhz-14-pdip/dp/68T3783?in_merch=Popular%20Products - Bread Board
- Some Pull-up wires
- 220 - 270 Ohm resistor
- Momentary button
- LED (optional)
Due to some unexplainable dificulties I just left only the button that increases the digit but I was still exited seeing my project not connected to my Arduino anymore! :%
int aPin = 7; // a segment
int bPin = 6; // b segment
int cPin = 2; // c segment
int dPin = 3; // and so on....
int ePin = 4;
int fPin = 5;
int gPin = 8;
int upPin = 9; // button connection.
int ledPin = 10; // led connection. this is really optional, i just added it for debuging
int count = 0;
int d = 250; // delay, experiment with it so you'll see what it is.
void setup ()
{
pinMode(aPin, OUTPUT);
pinMode(bPin, OUTPUT);
pinMode(cPin, OUTPUT);
pinMode(dPin, OUTPUT);
pinMode(ePin, OUTPUT);
pinMode(fPin, OUTPUT);
pinMode(gPin, OUTPUT);
pinMode(upPin, INPUT);
zero ();
}
void loop ()
{
int up = digitalRead(upPin);
if ( up == 0)
{
digitalWrite (ledPin, HIGH);
off();
count ++;
if (count == 1)
{
off();
one ();
}
if (count == 2)
{
off();
two ();
}
if (count == 3)
{
off();
three ();
}
if (count == 4)
{
off();
four ();
}
if (count == 5)
{
off();
five ();
}
if (count == 6)
{
off();
six ();
}
if (count == 7)
{
off();
seven ();
}
if (count == 8)
{
off();
eight ();
}
if (count == 9)
{
off();
nine ();
}
if (count == 0)
{
off();
zero ();
}
if (count > 9)
{
count = 0;
zero ();
}
delay (d);
digitalWrite (ledPin, LOW);
}
}
void off ()
{
digitalWrite(aPin, LOW);
digitalWrite(bPin, LOW);
digitalWrite(cPin, LOW);
digitalWrite(dPin, LOW);
digitalWrite(ePin, LOW);
digitalWrite(fPin, LOW);
digitalWrite(gPin, LOW);
}
void one ()
{
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
}
void two ()
{
digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(gPin, HIGH);
digitalWrite(dPin, HIGH);
digitalWrite(ePin, HIGH);
}
void three ()
{
digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(dPin, HIGH);
digitalWrite(gPin, HIGH);
}
void four ()
{
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(gPin, HIGH);
digitalWrite(fPin, HIGH);
}
void five ()
{
digitalWrite(aPin, HIGH);
digitalWrite(fPin, HIGH);
digitalWrite(gPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(dPin, HIGH);
}
void six ()
{
digitalWrite(aPin, HIGH);
digitalWrite(fPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(dPin, HIGH);
digitalWrite(ePin, HIGH);
digitalWrite(gPin, HIGH);
}
void seven ()
{
digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
}
void eight ()
{
digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(dPin, HIGH);
digitalWrite(ePin, HIGH);
digitalWrite(fPin, HIGH);
digitalWrite(gPin, HIGH);
}
void nine ()
{ digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(fPin, HIGH);
digitalWrite(gPin, HIGH);
}
void zero ()
{
digitalWrite(aPin, HIGH);
digitalWrite(bPin, HIGH);
digitalWrite(cPin, HIGH);
digitalWrite(dPin, HIGH);
digitalWrite(ePin, HIGH);
digitalWrite(fPin, HIGH);
}
HELPFUL SOURCE!!
http://hlt.media.mit.edu/?p=1695
Here are the sources you'll find helpful:
THANK YOU FOR VIEWING!! PLEASE COMMENT!!
