Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino UNO microcontroller to perform a range of functions. The circuit includes input devices like pushbuttons and an IR sensor, output devices such as LEDs and an I2C LCD screen, a communication module (HC-05 Bluetooth Module), and a motor driver (L293D) to control DC motors. The circuit is powered by an 18650 Li-ion battery. The Arduino UNO facilitates the interaction between these components, allowing for sensor data processing, motor control, and wireless communication.

Component List

• Arduino UNO: A microcontroller board based on the ATmega328P, with a variety of digital and analog I/O pins.
• HC-05 Bluetooth Module: A wireless communication module that enables Bluetooth connectivity.
• LED (Red): A simple light-emitting diode for indication purposes.
• Pushbutton: An input device used to trigger events.
• Resistor (2.2 Ohms): A component used to limit current or divide voltages in the circuit.
• L293D Motor Driver: A motor driver IC that allows DC motors to be driven in both directions.
• 18650 Li-ion Battery: A rechargeable battery providing power to the circuit.
• DC Motor: An electric motor that runs on direct current electricity.
• IR Sensor: An infrared sensor used for object detection or distance measurement.
• I2C LCD 16x2 Screen: A liquid crystal display capable of displaying 16 characters per line across 2 lines, with an I2C interface for communication.

Wiring Details

Arduino UNO

• GND: Connected to the ground pins of the I2C LCD screen, HC-05 Bluetooth Module, IR sensor, and one pin of the pushbutton.
• 5V: Supplies power to the I2C LCD screen, HC-05 Bluetooth Module, IR sensor, and one side of a resistor.
• A4 (SCL): Connected to the SCL pin of the I2C LCD screen for I2C communication.
• A5 (SDA): Connected to the SDA pin of the I2C LCD screen for I2C communication.
• D7: Receives the output signal from the IR sensor.
• D6: Controls one of the enable pins of the L293D motor driver.
• D5: Controls another enable pin of the L293D motor driver.
• D4: Connected to the other side of the resistor, which is also connected to a pushbutton.
• D2: Connected to the anode of a red LED.
• D1 (TX): Connected to the TXD pin of the HC-05 Bluetooth Module.
• D0 (RX): Connected to the RXD pin of the HC-05 Bluetooth Module.

HC-05 Bluetooth Module

• GND: Connected to the ground net.
• VCC: Connected to the 5V net.
• TXD: Connected to the D1 (TX) pin of the Arduino UNO.
• RXD: Connected to the D0 (RX) pin of the Arduino UNO.

LED (Red)

• Cathode: Connected to the ground net.
• Anode: Connected to the D2 pin of the Arduino UNO.

Pushbutton

• Pin 1 (in): Connected to the ground net.
• Pin 4 (out): Connected to the D4 pin of the Arduino UNO through a 2.2 Ohms resistor.

Resistor (2.2 Ohms)

• Pin1: Connected to the D4 pin of the Arduino UNO.
• Pin2: Connected to the 5V net and the pushbutton.

L293D Motor Driver

• Pin 5 & Pin 7: Controlled by the D6 and D5 pins of the Arduino UNO, respectively.
• Pin 10 & Pin 9: Connected to one of the DC motors.
• Pin 12 & Pin 11: Connected to the other DC motor.
• Pin 3: Connected to the positive terminal of the 18650 Li-ion Battery.
• Pin 4: Connected to the negative terminal of the 18650 Li-ion Battery.

18650 Li-ion Battery

• +: Connected to the pin 3 of the L293D motor driver.
• -: Connected to the pin 4 of the L293D motor driver.

DC Motor

• Pin 1 & Pin 2: Connected to the L293D motor driver.

IR Sensor

• Out: Connected to the D7 pin of the Arduino UNO.
• Gnd: Connected to the ground net.
• Vcc: Connected to the 5V net.

I2C LCD 16x2 Screen

• GND: Connected to the ground net.
• VCC (5V): Connected to the 5V net.
• SCL: Connected to the A4 pin of the Arduino UNO.
• SDA: Connected to the A5 pin of the Arduino UNO.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Note: The provided code is a template and does not include specific functionality. It needs to be populated with the logic to control the components based on the circuit's requirements.