Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as sensors, a display, a relay module, a power supply, and an Arduino UNO microcontroller. The circuit is designed to monitor temperature and humidity, display the data on an OLED screen, and control an exhaust fan and a humidifier based on the sensor readings.

Component List

1. KY-004 Key Switch Module

   • Pins: S, Middle, -
   • Description: A simple key switch module used for user input.

2. RTC (Real-Time Clock)

   • Pins: VCC, GND, CLK, DAT, RST
   • Description: A real-time clock module used for keeping track of time.

3. KY-015 DHT11 Temperature-Humidity Sensor Module

   • Pins: VCC, GND, DOUT
   • Description: A sensor module used to measure temperature and humidity.

4. POWER SUPPLY 5V 5AMP

   • Pins: 220V Positive Pole (AC), 220V Negative Pole (AC), GND, GND (DC), 12V-24V Output (DC)
   • Description: A power supply module providing 5V and 12V-24V DC outputs.

5. 0.96" OLED

   • Pins: GND, VDD, SCK, SDA
   • Description: A small OLED display used to show data.

6. Exhaust Fan

   • Pins: L, GND
   • Description: An exhaust fan used for ventilation.

7. Power 220V

   • Pins: Hot wire, Neutral wire
   • Description: A 220V AC power source.

8. KIS-3R33S USB Output Converter Step Down Module

   • Pins: +, -, USB
   • Description: A step-down converter module providing USB output.

9. 5V Adapter

   • Pins: AC In 1, AC In 2, 5V, GND
   • Description: A 5V adapter for powering components.

10. Arduino UNO

    • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
    • Description: A microcontroller board used to control the circuit.

11. Relay 4 Channel 5V

    • Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4
    • Description: A relay module used to control high voltage devices.

12. USB Power

    • Pins: +, -
    • Description: A USB power source.

13. DIY Humidifier

    • Pins: V- 24V, V+ 24V, V+ 5V, V- 5V
    • Description: A DIY humidifier used to maintain humidity levels.

Wiring Details

KY-004 Key Switch Module

• S: Connected to Arduino UNO D3
• Middle: Not connected
• -: Connected to GND (shared with OLED, RTC, DHT11, and Arduino UNO)

RTC (Real-Time Clock)

• VCC: Connected to 5V (shared with OLED, DHT11, and Arduino UNO)
• GND: Connected to GND (shared with OLED, KY-004, DHT11, and Arduino UNO)
• CLK: Connected to Arduino UNO A5 (shared with OLED SCK)
• DAT: Connected to Arduino UNO A4 (shared with OLED SDA)
• RST: Not connected

KY-015 DHT11 Temperature-Humidity Sensor Module

• VCC: Connected to 5V (shared with OLED, RTC, and Arduino UNO)
• GND: Connected to GND (shared with OLED, KY-004, RTC, and Arduino UNO)
• DOUT: Connected to Arduino UNO D2

POWER SUPPLY 5V 5AMP

• 220V Positive Pole (AC): Connected to Relay 4 Channel 5V NO2
• 220V Negative Pole (AC): Connected to Power 220V Neutral Wire
• GND: Connected to Power 220V Neutral Wire
• GND (DC): Connected to KIS-3R33S USB Output Converter Step Down Module - and DIY Humidifier V- 24V
• 12V-24V Output (DC): Connected to KIS-3R33S USB Output Converter Step Down Module + and DIY Humidifier V+ 24V

0.96" OLED

• GND: Connected to GND (shared with KY-004, RTC, DHT11, and Arduino UNO)
• VDD: Connected to 5V (shared with RTC, DHT11, and Arduino UNO)
• SCK: Connected to Arduino UNO A5 (shared with RTC CLK)
• SDA: Connected to Arduino UNO A4 (shared with RTC DAT)

Exhaust Fan

• L: Connected to Relay 4 Channel 5V NO4
• GND: Connected to Power 220V Neutral Wire

Power 220V

• Hot wire: Connected to Relay 4 Channel 5V COM2 and COM4
• Neutral wire: Connected to Power Supply 5V 5AMP 220V Negative Pole (AC) and GND

KIS-3R33S USB Output Converter Step Down Module

• +: Connected to Power Supply 5V 5AMP 12V-24V Output (DC)
• -: Connected to Power Supply 5V 5AMP GND (DC)
• USB: Not connected

5V Adapter

• AC In 1: Not connected
• AC In 2: Not connected
• 5V: Not connected
• GND: Not connected

Arduino UNO

• UNUSED: Not connected
• IOREF: Not connected
• Reset: Not connected
• 3.3V: Not connected
• 5V: Connected to 5V (shared with OLED, RTC, and DHT11)
• GND: Connected to GND (shared with OLED, KY-004, RTC, and DHT11)
• Vin: Not connected
• A0: Not connected
• A1: Not connected
• A2: Not connected
• A3: Not connected
• A4: Connected to RTC DAT and OLED SDA
• A5: Connected to RTC CLK and OLED SCK
• SCL: Not connected
• SDA: Not connected
• AREF: Not connected
• D13: Not connected
• D12: Not connected
• D11: Not connected
• D10: Not connected
• D9: Connected to Relay 4 Channel 5V IN2
• D8: Connected to Relay 4 Channel 5V IN4
• D7: Connected to Relay 4 Channel 5V IN3
• D6: Not connected
• D5: Not connected
• D4: Not connected
• D3: Connected to KY-004 Key Switch Module S
• D2: Connected to KY-015 DHT11 Temperature-Humidity Sensor Module DOUT
• D1: Not connected
• D0: Not connected

Relay 4 Channel 5V

• GND: Not connected
• IN1: Not connected
• IN2: Connected to Arduino UNO D9
• IN3: Connected to Arduino UNO D7
• IN4: Connected to Arduino UNO D8
• VCC: Not connected
• COM1: Not connected
• COM2: Connected to Power 220V Hot Wire
• COM3: Not connected
• COM4: Connected to Power 220V Hot Wire
• NO1: Not connected
• NO2: Connected to Power Supply 5V 5AMP 220V Positive Pole (AC)
• NO3: Not connected
• NO4: Connected to Exhaust Fan L
• NC1: Not connected
• NC2: Not connected
• NC3: Not connected
• NC4: Not connected

USB Power

• +: Connected to DIY Humidifier V+ 5V
• -: Connected to DIY Humidifier V- 5V

DIY