Answers to: Arduino robot with ultrasonic sensor | Our Expert Explains

HC-SR04 Ultrasonic Sensor Distance Module:using IO trigger for at least 10us high level signal. The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. 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. Power Supply:5V DC;Quiescent Current:<2mA;Effectual Angle:<15°;Ranging Distance:2cm~450cm;Resolution:0.3 cm,Module precision:blind spots (2cm)-SUPER CLOSE. The module performance is stable,measure distance accurately.SRF05,SRF02 ultrasonic ranging module comparable.This module is compatible with GH-311 anti-theft module.

Ultrasonic hc-sr04 distance measuring transducer sensor HC-SR04 consists of ultrasonic transmitter, receiver, and control circuit. When trigged it sends out a series of 40KHz ultrasonic pulses and receives echo from an object. ~Power supply: 5V DC; quiescent current: less than 2mA; effectual angle: less than 15°; distance: 2cm500cm; resolution: 0. 3 cm~ Package Content: 5pcs HC-SR04 with a little gift

Quality -- Power Supply : 5V DC ; Quiescent Current : <2mA ; Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm. Operating Principle -- Ultrasonic hc-sr04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit. HC-SR04 ultrasonic sensor module -- Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning. Test Distance Formula -- The distance between the unit and the object is calculated by measuring the traveling time of sound and output it as the width of a TTL pulse,hc-sr04 test distance following formula -- L = 1/2 × T × C ( L is the distance, T is the time between the emission and reception, and C is the sonic speed ) Package Include -- 5 X HC-SR04 Ultrasonic Sensors , 10 X Female-Male Dupont Cables , 10 X Female-Female Dupont Cables , 3 X HC-SR04 Mounting Bracket

Ultrasonic hc-sr04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit. HC-SR04 Ultrasonic Sensor Distance Module: using IO trigger for at least 10us high level signal，When triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object. Hc-sr04 Test Distance following formula: L = 1/2 × T × C ( L is the distance, T is the time between the emission and reception, and C is the sonic speed) Power Supply : 5V DC; Quiescent Current : <2mA,; Effectual Angle: <15° ; Detection Distance : 2cm~450 cm; Resolution : 0.3 cm Package Content: 5 HC-SR04 Ultrasonic Sensors , 10 Female-Male Dupont Cables , 10 Female-Female Dupont Cables , 1 Exquisite package box

ELEGOO Smart Robot Car: An educational STEM kit beginners (kids) to get hands-on experience about programming, electronics assembling and robotics knowledge. It is an integration solution for robotics learning and made for education. Complete Package: Contains 24 kinds of module parts including obstacle avoidance, line tracing module, infrared remote control and also you can control it via phone and tablets of Android and iOS system, etc. Easy to Assemble: All the module interface has been modified with XH2. 54 ports as to make it much easier and convenient to assemble the car and reduce the chances for errors. Refined Tutorial: HD rendering instructions on how to assemble the robot car from scratch and all the necessary programs and codes are included. Upgraded Package Design: More minimalism design and make it a perfect gift for your kids and friends. Note：(Applicable Age : 12+)To use Elegoo starter kits requires basic electronic knowledge. If the user has no experience, it would be better to have someone lead and teach them while studying.

[PACKAGE INCLUDED] 3pcs HC-SR04 distance measurement module & 3pcs mounting bracket for installation [FEATURE] These module is for distance measuring transducer that working with ultrasonic, they consist of ultrasonic transmitter, receiver, and control circui [FUNCTIONAL PARAMETER] Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm. Power Supply : 5V DC ; Quiescent Current : <2mA ; [UNIVERSAL COMPATIBILITY] Built in standard interface that can be controlled directly by microcontroller，such as 8051, AVR [WORKING PRINCIPLE] Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning.The distance = (duration time * sound velocity (340M/S) / 2

Test mode :Using IO trigger for high level signal.( Not less that 10us),The Module sends eight 40 kHz automatically and detect whether there is a pulse signal back. The detection zone: 0.78~196 in/ (2cm~500cm); High precision: up to 0.12 in/(0.3 cm) Effectual angle: less than 15°. Power supply: 5V DC; Quiescent current: less than 2mA. Test distance = ((Duration of high level)*(Sonic :340m/s))/2. Package included: 5 x HC-SR04 Ultrasonic Module.

This kit with tutorial user manual containing more than 10 lessons,code,Libraries,Installation method and so on. LAFVIN Smart Robot Car 2WD Chassis Kit is simple and very easy to install. You will learn obstacle avoidance, IR remote control. This kit includes R3 Board HC-SR04 Ultrasonic Sensor,V5.0 extension board,Line tracking module etc. It is an integration solution for robotics learning and made for Arduino education.

The tutorial include codes,labraries and lessons.It will teach every users how to assembly the smart robot car kit and use R3 controller board, sensors and modules. LAFVIN robotic car learning kit is designed for beginners to learn Arduino programming and get hands-on experience on robot design and assembly This kit includes R3 Board HC-SR04 Ultrasonic Sensor,V5.0 extension board,Line tracking module,Bluetooth module,etc. You will learn the Line Tracking, Ultraviolet Obstacle Avoidance, IR Remote Control, Bluetooth Remote Control of Smart Car, you can also extend other functions on this robot platform. This car really excellent and safe to be a perfect gift for your children and friend.