Please select other codes for this lecture from the links below.
Related or required files and link to this lesson
Part 2: LCD, LED and OLED Screens
In this lecture we learn how to use TM1637 four digit seven segment display to display integer and hexadecimal vlaues. Decimal point can't be dispalyed easily.
/*
* Robojax Arduino Step By Step Course
* Lesson 20-1 Introduction to TM1637 4 digits LED Display
*
* This code has been modefied from the Arduino library
Please watch video instruction here https://youtu.be/cJqmXjERwkQ
This code is available at http://robojax.com/course1/?vid=lecture11
with over 100 lectures Free On YouTube Watch it here http://robojax.com/L/?id=338
Get the code for the course: http://robojax.com/L/?id=339
* Updted by Ahmad Shamshiri for Robojax
* in Ajax, Ontario, Canada
*
*
* This is code for LCD1602 Display with I2C module
* which can display text on the screen.
*/
#include <Arduino.h>
#include <TM1637Display.h>
// Module connection pins (Digital Pins)
#define CLK 5
#define DIO 6
// The amount of time (in milliseconds) between tests
#define TEST_DELAY 2000
const uint8_t SEG_DONE[] = {
SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, // d
SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, // O
SEG_C | SEG_E | SEG_G, // n
SEG_A | SEG_D | SEG_E | SEG_F | SEG_G // E
};
TM1637Display display(CLK, DIO);
void setup()
{
//Robojax Arduino Step By Step Course http://robojax.com/L/?id=338
}
void loop()
{
//Robojax Arduino Step By Step Course http://robojax.com/L/?id=338
int k;
uint8_t data[] = { 0xff, 0xff, 0xff, 0xff };
display.setBrightness(0x0f);
// All segments on
display.setSegments(data);
delay(TEST_DELAY);
// Selectively set different digits
data[0] = 0b01001001;
data[1] = display.encodeDigit(1);
data[2] = display.encodeDigit(2);
data[3] = display.encodeDigit(3);
for(k = 3; k >= 0; k--) {
display.setSegments(data, 1, k);
delay(TEST_DELAY);
}
display.setSegments(data+2, 2, 2);
delay(TEST_DELAY);
display.setSegments(data+2, 2, 1);
delay(TEST_DELAY);
display.setSegments(data+1, 3, 1);
delay(TEST_DELAY);
// Show decimal numbers with/without leading zeros
bool lz = false;
for (uint8_t z = 0; z < 2; z++) {
for(k = 0; k < 10000; k += k*4 + 7) {
display.showNumberDec(k, lz);
delay(TEST_DELAY);
}
lz = true;
}
// Show decimal number whose length is smaller than 4
for(k = 0; k < 4; k++)
data[k] = 0;
display.setSegments(data);
// Run through all the dots
for(k=0; k <= 4; k++) {
display.showNumberDecEx(0, (0x80 >> k), true);
delay(TEST_DELAY);
}
display.showNumberDec(153, false, 3, 1);
delay(TEST_DELAY);
display.showNumberDec(22, false, 2, 2);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 3);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 2);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 1);
delay(TEST_DELAY);
display.showNumberDec(0, true, 1, 0);
delay(TEST_DELAY);
// Brightness Test
for(k = 0; k < 4; k++)
data[k] = 0xff;
for(k = 0; k < 7; k++) {
display.setBrightness(k);
display.setSegments(data);
delay(TEST_DELAY);
}
// On/Off test
for(k = 0; k < 4; k++) {
display.setBrightness(7, false); // Turn off
display.setSegments(data);
delay(TEST_DELAY);
display.setBrightness(7, true); // Turn on
display.setSegments(data);
delay(TEST_DELAY);
}
// Done!
display.setSegments(SEG_DONE);
while(1);
//Robojax Arduino Step By Step Course http://robojax.com/L/?id=338
}
The least I expect from you is to give the video a thumbs up and subscribe to my channel. I appreciate it. I have spent hundreds of hours making these lectures and writing code. You don't lose anything by subscribing to my channel. Your subscription is a stamp of approval for my videos, helping more people find them and, in turn, helping me. Thank you!
If you found this tutorial helpful, please support me so I can continue creating content like this. support me via PayPal 
**** AFFILIATE PROGRAM **** We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.