Laser Diode Module
৳100
Sonar Sensor HC SR04
৳90
The HC-SR04 Ultrasonic Sonar Sensor is a widely used distance measuring module for robotics, automation, and smart electronics projects. Using ultrasonic waves, it can accurately measure distances from 2 cm up to 4 meters, making it perfect for obstacle-avoiding robots, security systems, liquid-level detection, and smart parking systems. Easy to interface with Arduino, ESP32, Raspberry Pi, and other microcontrollers, this sensor is highly popular among Bangladeshi students, makers, and robotics enthusiasts. Affordable and reliable, the HC-SR04 is an essential component for projects requiring non-contact distance measurement.
The HC-SR04 is an ultrasonic ranging module that integrates a transmitter, receiver, and control circuit into a single unit. It features four pins: VCC, GND, Trigger, and Echo, making it simple to interface with microcontrollers, including Arduino boards. This module provides accurate distance measurement and is widely used in robotics and obstacle detection projects.
The basic principle of work is:
(1) Using IO trigger for at least 10us high level signal,
(2) The Module automatically sends eight 40 kHz and detect whether there is a
pulse signal back.
(3) IF the signal back, through high level , time of high output IO duration is
the time from sending ultrasonic to returning.
Test distance = (high level time×velocity of sound (340M/S) / 2
Get Bracket for Sonar sensor
- Working Voltage DC 5 V
- Working Current 15mA
- Working Frequency 40Hz
- Max Range 4m
- Min Range 2cm
- Measuring Angle 15 degree
- Trigger Input Signal 10uS TTL pulse
- Echo Output Signal Input TTL lever signal and the range in proportion
- Dimension 45*20*15mm
