Didispark ATTiny85 with Ultrasonic HC SR04 Sensor

In this illustration we will going to wire the Digispark ATTiny Development Board with HC-SR04 Ultrasonic range detector, as our output we will going to use an RGB LED when the objects is near or closer to the sensor the RGB LED will going to switch on and if it is out of range the blue will light on. In the example below we can used a dedicated 5v power to supply 5v to our Digispark ATTiny Board.

Required Components

1x Digispark ATTiny Board
1x HCSR04 Ultrasonic Range Detector
1x RGB LED
1x Jumper Wire
1x Solder less Bread Board

Wiring Diagram

Arduino Sketch

#include <NewPing.h> //Iclud Arduino Pin Library
 
#define TRIGGER_PIN 3 //HCR04 Trigger set to pin 3
#define ECHO_PIN 5 // HCR04 Echo set to Pin 5
#define RED_PIN 0 // Red light set to Pin 0
#define GREEN_PIN 1 // Green Light set to Pin 1
#define BLUE_PIN 4 // Blue light set to Pin 4 
#define DISTANCE 60 // Distance value
 
NewPing sonar(TRIGGER_PIN, ECHO_PIN, DISTANCE); 
 
void setup() {
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
}
void loop() {
  uint8_t distance = sonar.ping_cm();
 
  if (distance) {
    uint8_t greenValue = map(distance, 1, DISTANCE, 0, 255);  // Mapping the distance range of 0 to 255 Pulse with Modulation value for the green LED
    uint8_t redValue = 255 - greenValue;
    analogWrite(GREEN_PIN, greenValue);
    analogWrite(RED_PIN, redValue);
    digitalWrite(BLUE_PIN, LOW);
  } else {
    digitalWrite(GREEN_PIN, LOW); // GREEN LIGHT Off Out of reading distance range
    digitalWrite(RED_PIN, LOW);   // RED LIGHT off
    digitalWrite(BLUE_PIN, HIGH); // BLUE LIGHT On
  }
  delay(100);
}

#include <NewPing.h> //Iclud Arduino Pin Library

#define TRIGGER_PIN 3 //HCR04 Trigger set to pin 3

#define ECHO_PIN 5 // HCR04 Echo set to Pin 5

#define RED_PIN 0 // Red light set to Pin 0

#define GREEN_PIN 1 // Green Light set to Pin 1

#define BLUE_PIN 4 // Blue light set to Pin 4

#define DISTANCE 60 // Distance value

NewPing sonar(TRIGGER_PIN, ECHO_PIN, DISTANCE);

void setup() {

pinMode(RED_PIN, OUTPUT);

pinMode(GREEN_PIN, OUTPUT);

pinMode(BLUE_PIN, OUTPUT);

}

void loop() {

uint8_t distance = sonar.ping_cm();

if (distance) {

uint8_t greenValue = map(distance, 1, DISTANCE, 0, 255); // Mapping the distance range of 0 to 255 Pulse with Modulation value for the green LED

uint8_t redValue = 255 - greenValue;

analogWrite(GREEN_PIN, greenValue);

analogWrite(RED_PIN, redValue);

digitalWrite(BLUE_PIN, LOW);

} else {

digitalWrite(GREEN_PIN, LOW); // GREEN LIGHT Off Out of reading distance range

digitalWrite(RED_PIN, LOW); // RED LIGHT off

digitalWrite(BLUE_PIN, HIGH); // BLUE LIGHT On

}

delay(100);

}

Didispark ATTiny85 with Ultrasonic HC SR04 Sensor

2 thoughts on “Didispark ATTiny85 with Ultrasonic HC SR04 Sensor”

Dan Toraason
at
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Great, simple and illustrative project! I almost missed the resistors, and they are not listed in the parts list. I expect something like 100ohm will work.

I was looking for something simple to try with my ATtiny and HC-SR04 and this is it!

Thanks!
D
Reply
catur
at
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why ground of LED connect to VCC, not to ground?
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2 thoughts on “Didispark ATTiny85 with Ultrasonic HC SR04 Sensor”

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