Stair Light Presentation

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Hardware

Arduino Uno

Bread boardPush button

LED

Potentiometer

TransistorRelay

software

Use AVR GCC (WinAVR )Programmers

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1. Light switch LED on, relay off

Set the dimming time using pottentiometer2. Push a light switch (push button)3. Turn on the relay (with transistor)

Start timer 0

4. Start the LED dimming start timer 1

5. After a while, turn off the relay.

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//Turn on the lampPORTB = (1

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while(1){

//Turn off the LEDPORTB = 0x01;

if(debounce(&PINB,PB3)){

// set compare register initially to maximumOCR1A=ICR1;// set on the relay

PB2=0X02//Timer/Counter1, Output Compare A Match Interrupt EnableTIMSK1 |=(1

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void initialise_timer0 (void){

//Set Timer and prescaler to 8TCCR0B|=(1

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void initialise_timer1 (void){

//Clear OC1A/OC1B on Compare Match (Setoutput to low level).//select fast PWM//

selecte prescaler to 8TCCR1A=((0x01

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void ADC_initialize (void)

{//select channel 2

ADMUX|=(1

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ISR(ADC_vect)

{

uint16_t data;

data=ADCL;

data+=(ADCH

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static inline uint8_t debounce(volatile uint8_t *port, const uint8_tpin)

{if(!(*port & (1

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