Circuit Documentation

Summary

This circuit is designed to control a set of gearmotors, a servomotor, and a mini water pump, with the capability to detect flames using flame sensors. It is powered by a 9V battery pack and uses an Arduino UNO as the central microcontroller to manage inputs and outputs. A 5V relay is used to control the mini water pump, and an L293D motor driver is used to control the gearmotors. The servomotor is directly controlled by the Arduino UNO. The flame sensors provide digital outputs to the Arduino, which can be used to trigger specific actions within the system.

Component List

Microcontroller

• Arduino UNO: A microcontroller board based on the ATmega328P, with a variety of digital and analog I/O pins.

Motor Driver

• L293D Motor Driver: A motor driver IC capable of driving two DC motors or one stepper motor.

Motors

• Gearmotor DC Wheels Left: A DC gearmotor used to drive the left wheel of a vehicle or robot.
• Gearmotor DC Wheels Right: A DC gearmotor used to drive the right wheel of a vehicle or robot.
• Servomotor SG90: A small and lightweight servomotor for precise angular movement.

Sensors

• Sensor SHT113 Flame: Flame detection sensors that provide both analog and digital outputs.

Power Supply

• Battery AAx6 9V: A battery pack consisting of six AA batteries to provide a 9V power supply.

Actuators

• Mini Water Pump: A small pump for moving water, controlled via a relay.
• 5V Relay: An electromechanical switch used for turning the mini water pump on and off.

Miscellaneous

• Comment: Placeholder for additional notes or comments in the circuit design.

Wiring Details

Arduino UNO

• Vin connected to the common terminal of the 5V relay and the VCC of the 9V battery pack.
• GND connected to the ground of various components including sensors, relay, servomotor, and battery pack.
• 5V connected to the VCC of the 5V relay and flame sensors.
• D11 connected to pin 8 of the L293D motor driver.
• D10 connected to pin 7 of the L293D motor driver.
• D9 connected to pin 6 of the L293D motor driver.
• D8 connected to pin 5 of the L293D motor driver.
• D6 connected to the SIG pin of the Servomotor SG90.
• D5 connected to the In pin of the 5V relay.
• D4, D3, D2 connected to the D0 pins of the flame sensors.

L293D Motor Driver

• Pin 3 connected to the VCC of the 9V battery pack.
• Pin 4 connected to the ground of the 9V battery pack.
• Pin 8, Pin 7, Pin 6, Pin 5 connected to the Arduino UNO for control signals.
• Pin 10, Pin 9 connected to the right gearmotor.
• Pin 12, Pin 11 connected to the left gearmotor.

Gearmotors

• Left Gearmotor: Connected to pins 12 and 11 of the L293D motor driver.
• Right Gearmotor: Connected to pins 10 and 9 of the L293D motor driver.

Servomotor SG90

• SIG connected to D6 of the Arduino UNO.
• VCC and GND connected to the 5V and ground of the Arduino UNO, respectively.

Flame Sensors

• A0 (Analog output) not connected in this configuration.
• D0 (Digital output) connected to D4, D3, and D2 of the Arduino UNO for different instances.
• GND and VCC connected to the ground and 5V of the Arduino UNO, respectively.

Mini Water Pump

• VCC connected to the Normally Open pin of the 5V relay.
• GND connected to the ground of the circuit.

5V Relay

• Common terminal connected to the Vin of the Arduino UNO and VCC of the 9V battery pack.
• GND and VCC connected to the ground and 5V of the Arduino UNO, respectively.
• In connected to D5 of the Arduino UNO.
• Normally Open connected to the VCC of the mini water pump.

Documented Code

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

}

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

}

The provided code is a template for the Arduino UNO with empty setup() and loop() functions. The setup() function is intended for initialization code that runs once when the system starts, and the loop() function contains the main logic of the program that runs repeatedly. Specific functionality must be implemented within these functions to control the motors, read sensor inputs, and activate the relay for the water pump based on the desired behavior of the circuit.