Circuit Documentation

Summary

This circuit is designed to interface various sensors and actuators with an Arduino UNO microcontroller. It includes a DC motor controlled via a relay, a DHT11 humidity and temperature sensor, a TDS (Total Dissolved Solids) sensor module, a pH meter, and a switching power supply connected to an AC source. The Arduino UNO serves as the central processing unit, reading sensor data and controlling the DC motor through the relay.

Component List

DC Motor

• Description: A motor that converts DC electrical energy into mechanical energy.
• Pins: pin 1, pin 2

Relay 4 Channel 5v

• Description: An electrically operated switch that allows the Arduino to control higher power devices.
• Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4

DHT11 Humidity and Temperature Sensor

• Description: A sensor that measures ambient humidity and temperature.
• Pins: VDD, DATA, NULL, GND

TDS Sensor Module

• Description: A sensor used to measure the total dissolved solids in water.
• Pins: TDS Negative, TDS Positive, TDS A

PH Meter

• Description: A sensor used to measure the acidity or alkalinity of a solution.
• Pins: Signal, VCC, GND

Switching Power Supply

• Description: A power supply that converts AC to DC power and regulates the output voltage.
• Pins: AC, GND, -V, +V

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

AC Source

• Description: A source of alternating current (AC) electrical power.
• Pins: +, -

Wiring Details

DC Motor

• pin 1: Connected to the -V of the Switching Power Supply
• pin 2: Connected to the NO1 (Normally Open) contact of the Relay 4 Channel 5v

Relay 4 Channel 5v

• GND: Connected to GND of Arduino UNO
• IN1: Controlled by D8 of Arduino UNO
• VCC: Connected to 5V of Arduino UNO
• COM1: Connected to +V of the Switching Power Supply
• NO1: Connected to pin 2 of the DC Motor

DHT11 Humidity and Temperature Sensor

• VDD: Connected to 5V of Arduino UNO
• DATA: Connected to D7 of Arduino UNO
• GND: Connected to GND of Arduino UNO

TDS Sensor Module

• TDS Negative: Connected to GND of Arduino UNO
• TDS Positive: Connected to 5V of Arduino UNO
• TDS A: Connected to A0 of Arduino UNO

PH Meter

• Signal: Connected to A1 of Arduino UNO
• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO

Switching Power Supply

• AC: Connected to both + and - of the AC Source
• GND: Connected to pin 1 of the DC Motor
• -V: Connected to pin 1 of the DC Motor
• +V: Connected to COM1 of the Relay 4 Channel 5v

Arduino UNO

• 5V: Provides power to the Relay 4 Channel 5v, DHT11 Sensor, TDS Sensor Module, and PH Meter
• GND: Common ground for Relay 4 Channel 5v, DHT11 Sensor, TDS Sensor Module, and PH Meter
• D7: Reads data from the DHT11 Sensor
• D8: Controls IN1 of the Relay 4 Channel 5v
• A0: Reads analog data from the TDS Sensor Module
• A1: Reads analog data from the PH Meter

AC Source

• +: Connected to AC of the Switching Power Supply
• -: Connected to AC of the Switching Power Supply

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 completed with the logic for reading sensors and controlling the relay.