Circuit Documentation

Summary

This circuit is designed to integrate various sensors and modules with an Arduino UNO microcontroller. The system includes a PIR motion sensor, a DS18B20 temperature sensor, a piezo buzzer, a Sim800l GSM module, a solar panel, a solar charge controller, a 12V 7Ah battery, and a relay module. The circuit is powered by a solar panel and battery setup, ensuring sustainable energy usage.

Component List

1. Arduino UNO

   • Description: Microcontroller board based on the ATmega328P.
   • 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

2. PIR/Motion Sensor

   • Description: Sensor to detect motion.
   • Pins: GND, OUTPUT, VCC

3. DS18B20 Temperature Sensor

   • Description: Digital temperature sensor.
   • Pins: GND, VCC, OUT

4. Piezo Buzzer

   • Description: Sound-producing device.
   • Pins: pin 1, pin 2

5. Sim800l

   • Description: GSM module for communication.
   • Pins: NET, RST, VCC, RXD, TXD, GND

6. Solar Panel

   • Description: Converts sunlight into electrical energy.
   • Pins: +, -

7. Solar Charge Controller

   • Description: Manages the power from the solar panel to the battery and load.
   • Pins: Solar Cell +, Solar Cell -, Battery +, Battery -, Load +, Load -

8. 12V 7Ah Battery

   • Description: Rechargeable battery for energy storage.
   • Pins: 12v +, 12v -

9. Resistor (4700 Ohms)

   • Description: Limits current flow.
   • Pins: pin1, pin2

10. Relay Module (5V-30V)

    • Description: Electrically operated switch.
    • Pins: common contact, normally open, normally closed, trigger, V-, V+

Wiring Details

Arduino UNO

• 5V: Connected to VCC of PIR/Motion Sensor, VCC of Sim800l, V+ and normally open of Relay Module, pin1 of Resistor (4700 Ohms).
• GND: Connected to GND of PIR/Motion Sensor, GND of Sim800l, Load - of Solar Charge Controller, pin 2 of Piezo Buzzer, GND of DS18B20 Temperature Sensor.
• Vin: Connected to Load + of Solar Charge Controller.
• D8: Connected to trigger of Relay Module.
• D7: Connected to common contact of Relay Module.
• D6: Connected to pin 1 of Piezo Buzzer.
• D5: Connected to TXD of Sim800l.
• D4: Connected to RXD of Sim800l.
• D3: Connected to pin2 of Resistor (4700 Ohms).
• D2: Connected to OUTPUT of PIR/Motion Sensor.

PIR/Motion Sensor

• VCC: Connected to 5V of Arduino UNO.
• GND: Connected to GND of Arduino UNO.
• OUTPUT: Connected to D2 of Arduino UNO.

DS18B20 Temperature Sensor

• GND: Connected to GND of Arduino UNO.
• VCC: Connected to pin2 of Resistor (4700 Ohms).
• OUT: Connected to pin1 of Resistor (4700 Ohms).

Piezo Buzzer

• pin 1: Connected to D6 of Arduino UNO.
• pin 2: Connected to Load - of Solar Charge Controller.

Sim800l

• VCC: Connected to 5V of Arduino UNO.
• GND: Connected to GND of Arduino UNO.
• TXD: Connected to D5 of Arduino UNO.
• RXD: Connected to D4 of Arduino UNO.

Solar Panel

• +: Connected to Solar Cell + of Solar Charge Controller.
• -: Connected to Solar Cell - of Solar Charge Controller.

Solar Charge Controller

• Solar Cell +: Connected to + of Solar Panel.
• Solar Cell -: Connected to - of Solar Panel.
• Battery +: Connected to 12v + of 12V 7Ah Battery.
• Battery -: Connected to 12v - of 12V 7Ah Battery.
• Load +: Connected to Vin of Arduino UNO.
• Load -: Connected to GND of Arduino UNO, pin 2 of Piezo Buzzer.

12V 7Ah Battery

• 12v +: Connected to Battery + of Solar Charge Controller.
• 12v -: Connected to Battery - of Solar Charge Controller.

Resistor (4700 Ohms)

• pin1: Connected to OUT of DS18B20 Temperature Sensor.
• pin2: Connected to D3 of Arduino UNO, VCC of DS18B20 Temperature Sensor.

Relay Module (5V-30V)

• common contact: Connected to D7 of Arduino UNO.
• normally open: Connected to 5V of Arduino UNO.
• normally closed: Connected to V- of Relay Module, Load - of Solar Charge Controller.
• trigger: Connected to D8 of Arduino UNO.
• V-: Connected to normally closed of Relay Module.
• V+: Connected to 5V of 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:

}

Additional Documentation (documentation.txt)