Muhammad al-xorazmiy nomidagi toshkent axborot texnologiyalari universiteti samarqand filiali kompyuter injineringi fakulteti kompyuter tizimlari kafedrasi

Barcha raqamlar uchun 7 segmentli displey segmentlari.

Keyin 7 segmentli displey uchun biz quyida ko'rsatilgandek 0 dan 9 gacha kerakli kasr sonini hosil qilish uchun yoritilishi kerak bo'lgan alohida segmentlarni beradigan haqiqat jadvalini ishlab chiqarishimiz mumkin.

7 segmentli haqiqat jadvalini ko'rsatish

o'nlik Raqamlar	Shaxsiy segmentlar yoritilgan
	a	B	v	d	e	f	g
0	×	×	×	×	×	×
1		×	×
2	×	×		×	×		×
3	×	×	×	×			×
4		×	×			×	×
5	×		×	×		×	×
6	×		×	×	×	×	×
7	×	×	×
8	×	×	×	×	×	×	×
9	×	×	×			×	×

7 segmentli displeyni boshqarish

Garchi 7 segmentli displeyni bitta displey deb hisoblash mumkin bo'lsa-da, u bitta paket ichida yettita individual LED bo'lib, shuning uchun bu LEDlar oqimdan himoyalanishga muhtoj. LEDlar yorug'lik chiqaradigan yorug'lik miqdori old oqimga mutanosib ravishda oldinga qarab yo'naltirilgandagina yorug'lik hosil qiladi.

Bu shuni anglatadiki, LEDlarning yorug'lik intensivligi tobora ortib boradigan oqim bilan taxminan chiziqli ravishda oshadi. Shunday qilib, ushbu old oqimni boshqarish va LED segmentlariga zarar etkazmaslik uchun tashqi qarshilik bilan xavfsiz qiymat bilan cheklash kerak.

Qizil LED segmentida to'g'ridan-to'g'ri voltaj tushishi taxminan 2 dan 2,2 voltsgacha juda past (ko'k va oq LEDlar 3,6 voltsgacha bo'lishi mumkin), shuning uchun to'g'ri yoritish uchun LED segmentlari kuchlanish manbaiga ulangan bo'lishi kerak to'g'ridan-to'g'ri oqimni kerakli qiymatga cheklash uchun ishlatiladigan ketma-ket qarshilik bilan ushbu to'g'ridan-to'g'ri kuchlanish qiymatidan ortiqcha.

Odatda standart qizil rangli 7 segmentli displey uchun har bir LED segmenti to'g'ri yoritilganidan taxminan 15 mA tortishi mumkin, shuning uchun 5 voltli raqamli mantiqiy zanjirda oqimni cheklovchi qarshilik qiymati taxminan 200 the (5v - 2v) / 15mA ga teng bo'ladi. , yoki eng yuqori ustuvor qiymatga 220Ω ga teng.

Shunday qilib, displey segmentlari 220 Ω oqim cheklovchi qarshilikka qanday ulanganligini tushunish uchun quyidagi sxemani ko'rib chiqing.

Ulanish

Ushbu tajribada 7-segmentli displeyning har bir AG pinini mos ravishda bitta 200 ohm oqim cheklovchi qarshilikka ulang va keyin 4-11 pinga ulang. GND GND ga ulanadi. Dasturlash orqali biz mos keladigan LED (lar) ni yoqish uchun pin4-11 ning bir yoki bir nechtasini Yuqori darajali qilib sozlashimiz mumkin.

7 segmentli displey va SunFounder Uno platasi orasidagi simlar:

7-segmentli displey	Arduino Uno
A	7
B	6
C	5
D.	11
E	10
F	8
G	9
DP	4
Kom	GND

ulanish diagrammasi

2- rasm. 7 segmentli displayni ulanish diagrammasi

Dasur kodi esa quydagicha bo’ladi

int a=7;

int b=6;

int c=5;

int d=11;

int e=10;

int f=8;

int g=9;

int dp=4;

// 1

void display1(void)

{

   digitalWrite(b,HIGH);

   digitalWrite(c,HIGH);

}

//

void display2(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(e,HIGH);

   digitalWrite(d,HIGH);

}

// 3

void display3(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

     digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);

   digitalWrite(g,HIGH);

}

// 4

void display4(void)

{

   digitalWrite(f,HIGH);

   digitalWrite(b,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(c,HIGH);

 

}

// 5

void display5(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(f,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);

}

// 6

void display6(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(f,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);  

   digitalWrite(e,HIGH);  

}

// 7

void display7(void)

{   

  digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

   digitalWrite(c,HIGH);

}

// 8

void display8(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);  

   digitalWrite(e,HIGH);  

 digitalWrite(f,HIGH);  

}

void clearDisplay(void)

{

   digitalWrite(a,LOW);

   digitalWrite(b,LOW);

   digitalWrite(g,LOW);

 digitalWrite(c,LOW);

   digitalWrite(d,LOW);  

   digitalWrite(e,LOW);  

 digitalWrite(f,LOW);  

}

void display9(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

   digitalWrite(g,HIGH);

 digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);  

 digitalWrite(f,HIGH);  

}

void display0(void)

{

   digitalWrite(a,HIGH);

   digitalWrite(b,HIGH);

 digitalWrite(c,HIGH);

   digitalWrite(d,HIGH);  

   digitalWrite(e,HIGH);  

 digitalWrite(f,HIGH);  

}

void setup()

{

   int i;

   for(i=4;i<=11;i++)

       pinMode(i,OUTPUT);

}

void loop()

{     

   while(1)

   {   clearDisplay();

 display0();

       delay(2000);

       clearDisplay();

       display1();

       delay(2000);

       clearDisplay();

       display2();

       delay(2000);

       clearDisplay();

       display3();

       delay(2000);

       clearDisplay();

       display4();

       delay(2000);

       clearDisplay();

       display5();

       delay(2000);

       clearDisplay();

       display6();

       delay(2000);

       clearDisplay();

       display7();

       delay(2000);

       clearDisplay();

       display8();

       delay(2000);

       clearDisplay();  

       display9();

       delay(2000);      

   }

}

7 segmentli displayni ulanish diagrammasini ulab oldik

7 segmentli displayni ulanish diagrammasida jatijalar quydagicha chiqdi.