About Ultrasonic Sensor HC-SR04

This HC-SR04 Ultrasonic Range Finder is a very popular sensor that is found in many applications where it requires measuring distance and detect objects.
The module has two eyes like projects in the front which forms the Ultrasonic transmitter and Receiver. The HC-SR04 Ultrasonic Sensor uses sonar to determine the distance to an object like bats or dolphins do.

This Ultrasonic Sensor module is a transmitter, a receiver, and a control circuit in one single pack!! It has very handy and compact construction. It offers excellent range accuracy and stable readings in an easy-to-use package. Its operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect).

The Trigger and the Echo pins are the I/O pins of this module and hence they can be connected to the I/O pins of the micro controller/Arduino. When the receiver detects the return wave the Echo pin goes high for a particular amount of time which will be equal to the time taken for the wave to return back to the sensor.

Ultrasonic Distance Sensor provides very short (2CM) to long-range (4M) detection and ranging. The sensor provides precise and stable non-contact distance measurements from about 2cm to 4 meters with very high accuracy. It can be easily interfaced with any micro controller.
The module sends eight 40Khz square wave pulses and automatically detects whether it receives the returning signal. If there is a signal returning, a high-level pulse is sent on the echo pin. The length of this pulse is the time it took the signal from first triggering to the return echo.

Vayuyaan believes in satisfied customers, so whatever the product is, we first import them then test them for their supplier-defined and standard capabilities. Only after doing all the possible quality checks, we make the product available to our customers.

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HC-SR04 Ultrasonic Sensor Wiring:

+5V(positive)
Trig(control)
Echo (receive)
GND (negative)

Features:

Measures the distance within a wide range of 2cm to 400cm
Stable performance
Accurate distance measurement
High-density
Small blind distance

HC-SR04 Ultrasonic Sensor Applications:

Used to avoid and detect obstacles with robots like biped robots, obstacle avoider robots, path-finding robots, etc.
Used to measure the distance within a wide range of 2cm to 400cm
Can be used to map the objects surrounding the sensor by rotating it
Depth of certain places like wells, pits, etc can be measured since the waves can penetrate through the water

About TowerPro SG90 Micro Servo Motor

TowerPro SG90 Servo Motor is lightweight, high-quality, and lightning-fast. The servo is designed to work with almost all radio control systems. It is with excellent performance and high torque of 1.5 kg-cm gives you the freedom to use it for a variety of projects. The SG90 micro servo motor with accessories is perfect for RC helicopter, plane, car, boat, and truck use.

It equips Carbon Fiber Gears which makes the SG90 servo motor much lighter than the same metal gear motor. For small load applications using the metal gear, the servo motor adds on unnecessary weight, so we suggest using these lightweight plastic gear servo motors.

The TowerPro SG90 Micro Servo Motor is a 180° rotation servo. It is a Digital Servo Motor that receives and processes PWM signals faster and better. It equips sophisticated internal circuitry that provides good torque, holding power, and faster updates in response to external forces.

Wire Description