Arduino Blink LED Tutorial

by Lewis Loflin

The Arduino test program 'blink' uses 580 bytes. The video discusses alternative programming methods to make better use of resources.

• Arduino Nano Test Template
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• Arduino Blink LED Tutorial
• Arduino SSR Power Enable Program
• SSR Based High Voltage H-Bridge
• Arduino H-Bridge Motor Control Program with LCD Display
• Arduino XOR Blinks LED
• Arduino IF Statement Code Examples
• Arduino Motor Control Program Using IF

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/*
DDR - data direction register
0 = INPUT; 1 = OUTPUT

PORTB - port B data register
0 = 0V; 1 = 5V

0b00000000
PB7  to  PB0

PB0 = DP8
PB1 = DP9
PB2 = DP10
PB3 = DP11
PB4 = DP12
PB5 = DP13
PB6 & PB7 = crystal
*/

#define L1 9 // DP9 or PB1

// empty setup and loop 450 bytes

void setup() {
  // DDRB = DDRB | 0b00000010;  // 2 bytes
  // DDRB = 0b00000010; // 4 bytes
  // DDRB = 2; // same as above 4 bytes
  // pinMode(L1, OUTPUT); // 180 bytes
  // OUTPUT = 1, INPUT = 0
  // pinMode(L1, 1); // 180 bytes
}

byte num = 0; // 8-bit unsigned 0-255

void loop() {

  //   num = num ^ 1; // 12 bytes
  //   num = !num; // 14 bytes
  //   PORTB = PORTB ^ 0b00000010; // 8 bytes
  //   PORTB = PORTB ^ 2; // 8 bytes  

  //   read IO register directly  
  //   num = digitalRead(L1);
  //   num = !num
  //   num = digitalRead(L1) ^ 1;
  //   num = !digitalRead(L1);
  
  //   digitalWrite(L1, num); // 268 bytes once
  //   digitalWrite(L1, num = !num); // 278 bytes
  //   delay(500); // 162 bytes once
  //   myDelay(500); // 64 bytes once

  //   digitalWrite(L1, num); // 10 bytes
  //   delay(500); // 12 bytes
  //   myDelay(500); // 8 bytes

}

//  x * 1mS delay 64 bytes
// unsigned int 2 bytes
// 2^16 - 1 = 65,535
// unsigned long 4 bytes
// 2^32 - 1 = 4,294,967,295

// milliSec. delay 64 bytes
void myDelay(unsigned int x)   {
  for (unsigned int y = 0; y <= x; y++)   {
    delayMicroseconds(1000);
  }

}

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• Connecting Crydom MOSFET Solid State Relays
• Optical Isolation of H-Bridge Motor Controls

• Arduino Projects Revisited Revised
• Schematic for Following Projects
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• Videos
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• Arduino with MCP4725 12-Bit DAC

Videos:
My YouTube Videos on Electronics
Introduction to the Arduino Microcontroller
Part 1: Programming Arduino Output
Part 2: Programming Arduino Input
Part 3: Arduino Analog to Digital Conversion
Part 4: Using Arduino Pulse-Width-Modulation
Repost Arduino AC Power Control

• Comparator Theory Circuits Tutorial
• Constant Current Circuits with the LM334
• LM334 CCS Circuits with Thermistors, Photocells
• LM317 Constant Current Source Circuits
• TA8050P H-Bridge Motor Control
• All NPN Transistor H-Bridge Motor Control
• Basic Triacs and SCRs