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Arduino / ATtiny85 Delta AC 3-Phase Checker

This is a very simple way to control a 3-phase AC installation in a delta configuration.

BeginnerWork in progress2,259
Arduino / ATtiny85 Delta AC 3-Phase Checker

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
5 mm LED: Red
5 mm LED: Red
×2
5 mm LED: Green
5 mm LED: Green
×2
1N4007 – High Voltage, High Current Rated Diode
1N4007 – High Voltage, High Current Rated Diode
×2
resistors, diodes, capacitors.....
×1
ATtiny85
Microchip ATtiny85
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Mastech MS8217 Autorange Digital Multimeter
Digilent Mastech MS8217 Autorange Digital Multimeter

Story

Read more

Custom parts and enclosures

ATtiny85 3-phases checker ready for use

Here is an example of what can look like an ATtiny85 3-phases checker

Schematics

Arduino diagram for 3-phases checker

Arduino diagram for 3-phases checker.

ATtiny85 3-phases checker diagram

ATtiny85 3-phases checker diagram

Code

Arduino uno code for the 3-phases checker

C/C++
Arduino uno code for the 3-phases checker
/* 3 phases checker in triangle configuration
 *  
 *  For Arduino Uno
 *  
 *  


   RESET  => Arduino Uno push-button
   volt1 = A3  => 1st wire
   volt2 = A2  => 2nd wire
   volt3 = GND => 3rd wire
    LED1 = 8   => 1st wire LED
    LED2 = 9   => 2nd wire LED
 
 */

bool v1cut = false, v2cut = false;      

void setup() {
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}

void flasher(byte p) {
  digitalWrite(p, HIGH);
  delay(5);
  digitalWrite(p, LOW);
}

void loop() {
  unsigned long volt1, volt2;
  byte nbre_cc;
  byte a=0;
  
  while( v1cut == false && v2cut == false ) {
    volt1=0; volt2=0;
    nbre_cc=0;
    a++;
    if( a%10 == 0 ) flasher(0);
    for( byte i=0; i<100; i++ ) {
      unsigned int v1 = analogRead(A3);
      delayMicroseconds(10);
      unsigned int v2 = analogRead(A2);
      delayMicroseconds(10);
      volt1 += v1; volt2 += v2;
      if( v1-v2 < 20 || v2-v1 < 20 ) nbre_cc++;
      delay(1);
    }
    
    if( nbre_cc > 50 ) { v1cut = true; v2cut = true; }
    if( volt1 < 1000 ) v1cut = true;
    if( volt2 < 1000 ) v2cut = true;
  }   // end of while

    if( v1cut == true ) flasher(2);
    if( v2cut == true ) flasher(1);
}   // end of loop

ATtiny85 3-phases checker code

C/C++
ATtiny85 3-phases checker code
/* 3 phases checker in triangle configuration
 *  
 *  For ATiny85
 *  
 *  
                        +-------+
        RESET  <= PB5  1|*      |8  VCC
   input1 <= A3 = PB3  2|       |7  PB2 => LED1
   input2 <= A2 = PB4  3|       |6  PB1 => LED2
        input3 <= GND  4|       |5  PB0 => startup LED 
                        +-------+
 connection :

   RESET in PB5 = pin1  => push-button to GND // 10K to Vcc
   volt1 in PB3 = pin2  => 1st wire
   volt2 in PB4 = pin3  => 2nd wire
            GND = pin4  => 3rd wire
    LED1 in PB2 = pin7  => 1st wire
    LED2 in PB1 = pin6  => 2nd wire
startup LED PB0 = pin5  => flash after each reset push
 
 */

#include <avr/sleep.h>
#include <EEPROM.h>

#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif

bool eveil = true;                      // WD flag
bool v1cut = false, v2cut = false;      

void setup() {

  pinMode(0, INPUT);  
  pinMode(3, INPUT);
  pinMode(4, INPUT);
  pinMode(2, INPUT);
  pinMode(1, INPUT);

// the watchdog sets the interval delay :
// 0=16ms, 1=32ms,2=64ms, 3=128ms, 4=250ms, 5=500ms, 6=1s, 7=2s, 8=4s, 9=8s
  setup_watchdog(6);
  set_sleep_mode(SLEEP_MODE_PWR_DOWN);  // sleep mode 

  for( byte i=0; i<5; i++ ) {
    flasher(0);
    delay(100);
  }
}

void flasher(byte p) {
  pinMode(p, OUTPUT);
  digitalWrite(p, HIGH);
  delay(5);
  digitalWrite(p, LOW);
  pinMode(p, INPUT);
}

void loop() {

  unsigned long volt1, volt2;
  byte nbre_cc;
  byte a=0;
  
  while( v1cut == false && v2cut == false ) {
    volt1=0; volt2=0;
    nbre_cc=0;
    a++;
    if( a%10 == 0 ) flasher(0);
    for( byte i=0; i<100; i++ ) {
      unsigned int v1 = analogRead(A3);
      delayMicroseconds(10);
      unsigned int v2 = analogRead(A2);
      delayMicroseconds(10);
      volt1 += v1; volt2 += v2;
      if( v1-v2 < 20 || v2-v1 < 20 ) nbre_cc++;           
      delay(1);
    }
    
    if( nbre_cc > 50 ) { v1cut = true; v2cut = true; }
    if( volt1 < 1000 ) v1cut = true;
    if( volt2 < 1000 ) v2cut = true;
  }   // end of while
  
  if( eveil == true ) {
    eveil = false;
    if( v1cut == true ) flasher(2);
    if( v2cut == true ) flasher(1);
    system_sleep();           // go to sleep for 8 secondes
  }
}   // end of loop

// set system into the sleep state - system wakes up when wtchdog is timed out
void system_sleep() {
  cbi(ADCSRA,ADEN);           // Switch ADC OFF, bacause ADC uses ~320uA
  EEPROM.write(0, v1cut);
  EEPROM.write(1, v2cut);
  sleep_enable();
  sleep_mode();               // System actually sleeps here
  sleep_disable();            // System continues execution here when watchdog timed out 
  sbi(ADCSRA,ADEN);           // Switch Analog to Digital converter ON
  v1cut = EEPROM.read(0);
  v2cut = EEPROM.read(1);
}

void setup_watchdog( byte tempo ) {
  byte val;
  val = tempo & 7;
  if (tempo > 7) val |= (1<<5);
  val |= (1<<WDCE);
  MCUSR &= ~(1<<WDRF);                  // start timed sequence
  WDTCR |= (1<<WDCE) | (1<<WDE);        // set new watchdog timeout value
  WDTCR = val;
  WDTCR |= _BV(WDIE);
}
  
// Watchdog Interrupt Service / is executed when watchdog timed out
ISR(WDT_vect) { eveil = true; }        // set global flag  

Credits

philippedc

philippedc

4 projects • 13 followers

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