Obstacle Avoiding Robot · Robonautshop

Obstacle Avoiding Robot

Beginner

Ultrasonic obstacle avoidance with servo mount.

Ultrasonic-driven robot that steers around obstacles using a servo-mounted HC-SR04.

Required parts total

৳2,510

9 required components

View Obstacle Avoider Kit Read build guide Open in Robot Builder

Required components

Quantities, live stock from the mock inventory, and line prices.

HC-SR04 Ultrasonic Sensor
Qty 1 · ৳120 each
In stock
৳120
Arduino Uno R3
Qty 1 · ৳750 each
In stock
৳750
SG90 Micro Servo
Qty 1 · ৳150 each
In stock
৳150
N20 Metal Gear Motor · 100 RPM

Project code examples

Starter sketches for wiring checks — adapt pin numbers to your board.

HC-SR04 distance cm

Trig on 9, echo on 10.cpp

const int trigPin = 9;
const int echoPin = 10;

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  long duration = pulseIn(echoPin, HIGH);
  float cm = duration * 0.034 / 2;
  Serial.println(cm);
  delay(200);
}