Скачать или смотреть Arduino Nano Knight Rider LED PCF8574 I2c i/o expander 8 relais pcb

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http://84.106.2.21:8888/forum/index.php?action=view&id=296

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//WARNING DO NOT POWER THE RELAIS FROM NANO 5VDC VOLTAGE REGULATOR
//USE EXTERNAL 5VDC FOR RELAISPRINT
//
//http://84.107.155.75/forum/index.php?action=view&id=297
// example shows the byte binair written
// 0 is ON pcf8574 pulls to ground
// NO / without pcf8574.h library used
// arduino ide c code
#include "Wire.h";
// address of PCF8574 IC
#define PCF8574_ADDR (0x20)
void setup()
{
Wire.begin();
}

void loop()
{
while (1==1){
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B01111111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B10111111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11011111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11101111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11110111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11111011);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11111101);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11111110);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11111101);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11111011);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11110111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11101111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B11011111);
Wire.endTransmission();
delay(75);
Wire.beginTransmission(PCF8574_ADDR);
Wire.write(B10111111);
Wire.endTransmission();
delay(75);
}
}
//http://84.107.155.75/forum/index.php?action=view&id=297
//WARNING DO NOT POWER THE RELAIS FROM NANO 5VDC VOLTAGE REGULATOR
//USE EXTERNAL 5VDC FOR RELAISPRINT