| R3 SMD Board Improved Version CH340 Chip with Silk Screen |
| Infrared Obstacle Avoidance Tracking Sensor Module |
| L293D Motor Driver Board |
The L293D motor driver shield has all the bells and whistles required for a wide variety of low- to moderate-complexity projects.
The brains of the shield are two L293D motor drivers and a 74HC595 shift register.
The L293D is a dual-channel H-Bridge motor driver that can control two DC motors or a single stepper motor. Because the shield includes two such motor drivers, it can control up to four DC motors or two stepper motors.
| KY-008 650nm Laser sensor Module 6mm 5V |
“digitalWrite (LaserPin, HIGH)” and “digitalWrite (LaserPin, LOW)” indicates when the input voltage is high or low, which light up or fade out the Laser Diode respectively. The expected outcome should be:
| 5mm 5528 LDR Light Dependent Resistor，10LUX 10-20K |
They have a “light history” and their characteristics change a little as they acclimatise after long periods in darkness1. The resistance of LDRs decreases with increasing light levels1. The response time of LDRs is 2 – 50 ms1. The specifications of LDRs include2:
| Servo SG90 9g 180 Degree(china chip) Torque：1.6KG |
Servo motors are high torque motors which are commonly used in robotics and several other applications due to the fact that it’s easy to control their rotation. Servo motors have a geared output shaft which can be electrically controlled to turn one (1) degree at a time. For the sake of control, unlike normal DC motors, servo motors usually have an additional pin asides the two power pins (Vcc and GND) which is the signal pin. The signal pin is used to control the servo motor, turning its shaft to any desired angle.
we will be using the popular SG90 servo motor and our goal will be to rotate the servo motor from one end to the other.
Servo’s have high current requirement so when using more than one servo motor with the Arduino, it is important to connect their power connections to an external power supply as the Arduino may not be able to source the current needed for the servo. Since we will be using just one servo in this tutorial its fine to power it with an Arduino.
The following components are required to build this project:
| KY-025 Dry Reed Pipe Module |
|
Pin Name |
Description |
|
VCC |
The Vcc pin powers the module, typically with +5V |
|
GND |
Power Supply Ground |
|
DO |
Digital Output Pin. Directly connected to digital pin of Microcontroller |
|
AO |
Analog Output Pin. Directly connected to an analog pin of Microcontroller |
| 5V HC-SR04 Ultrasonic Sensor 4pin |
More details can be found in the HC-SR04 ultrasonic sensor datasheet attached at the bottom of this article.
Distance = Speed × Time
The Ultrasonic transmitter transmits an ultrasonic wave, this wave travels in air and when it gets objected by any material it gets reflected back toward the sensor this reflected wave is observed by the Ultrasonic receiver module
4-3-339 & 340, Shop No. 322, 3rd Floor, Navakar Complex, Gujrati Lane, Near Gujrati School, Koti, Hyderabad - 500095, Telangana, India
