Circuit Documentation

Summary

This circuit is designed to control a set of motors and a water pump, interfaced with an Arduino Nano microcontroller and an HC-05 Bluetooth module for wireless communication. It also includes a capacitive soil moisture sensor to monitor soil moisture levels. The L298N motor driver is used to drive the motors, and power is supplied by a battery case. The circuit is likely intended for a small-scale automated gardening system where soil moisture data can be used to control the watering cycle through the pump, and the motors may be used for positioning or other mechanical actions.

Component List

My battery case

• Description: A container for holding batteries to power the circuit.
• Pins: + (positive), - (negative)

Motor Amarillo Motorreductor Hobby (3 instances)

• Description: A yellow hobby gear motor used for various mechanical movements.
• Pins: vcc (power), GND (ground)

HC-05 Bluetooth Module

• Description: A Bluetooth module for wireless communication.
• Pins: Key, VCC, GND, TXD, RXD, State

L298N DC Motor Driver

• Description: A motor driver module for controlling DC motors.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

Arduino Nano

• Description: A small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x).
• Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

Water Pump

• Description: A pump used for moving water, likely for irrigation purposes.
• Pins: VCC, GND

Capacitive Soil Moisture Sensor V1.2

• Description: A sensor for measuring the moisture content in soil.
• Pins: GND, VCC, AOUT

Wiring Details

My battery case

• + connected to L298N DC motor driver 12V and Water Pump VCC
• - connected to common ground net

Motor Amarillo Motorreductor Hobby

• Three instances, each with vcc connected to L298N DC motor driver outputs (OUT1, OUT3, OUT4) and GND connected to common ground net

HC-05 Bluetooth Module

• RXD connected to Arduino Nano D1/TX
• TXD connected to Arduino Nano D0/RX
• VCC connected to Arduino Nano 5V
• GND connected to common ground net

L298N DC Motor Driver

• IN1 connected to Arduino Nano D11/MOSI
• IN2 connected to Arduino Nano D10
• IN3 connected to Arduino Nano D6
• IN4 connected to Arduino Nano D5
• 5V connected to Arduino Nano VIN
• GND connected to common ground net
• 12V connected to My battery case +
• OUT1, OUT2, OUT3, OUT4 connected to respective Motor Amarillo Motorreductor Hobby vcc pins

Arduino Nano

• D1/TX connected to HC-05 Bluetooth Module RXD
• D0/RX connected to HC-05 Bluetooth Module TXD
• GND connected to common ground net
• 5V connected to HC-05 Bluetooth Module VCC
• VIN connected to L298N DC motor driver 5V
• A0 connected to Capacitive Soil Moisture Sensor V1.2 AOUT
• 3V3 connected to Capacitive Soil Moisture Sensor V1.2 VCC

Water Pump

• VCC connected to My battery case +
• GND connected to common ground net

Capacitive Soil Moisture Sensor V1.2

• AOUT connected to Arduino Nano A0
• VCC connected to Arduino Nano 3V3
• GND connected to common ground net

Documented Code

Arduino Nano 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 contain any functional code. It needs to be populated with the logic to control the motors, read the sensor data, and communicate via Bluetooth.