Circuit Documentation

Summary

This circuit is designed to control an LED strip, a DC motor, and a buzzer using an Arduino UNO. It also includes a battery voltage monitoring system and two pushbuttons for user interaction. The LED strip can display different colors, and the buzzer can emit an SOS signal. The circuit is powered by a 12V battery and includes a charge controller for solar charging.

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. LED Strip

   • Description: RGB LED strip.
   • Pins: B, +12V, R, G

3. Pushbutton

   • Description: Momentary pushbutton switch.
   • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

4. Resistor (10k Ohms)

   • Description: Resistor with a resistance of 10k Ohms.
   • Pins: pin1, pin2

5. Resistor (200 Ohms)

   • Description: Resistor with a resistance of 200 Ohms.
   • Pins: pin1, pin2

6. Battery 12V

   • Description: 12V battery.
   • Pins: +, -

7. Mosfet

   • Description: Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).
   • Pins: Gate, Drain, Source

8. Charge Controller

   • Description: Charge controller for solar charging.
   • Pins: GND, BAT, Vin

9. Diode

   • Description: Diode for current direction control.
   • Pins: cathode, anode

10. Solar Cell

    • Description: Solar cell for generating electricity.
    • Pins: +, -

11. DC Motor

    • Description: Direct Current (DC) motor.
    • Pins: pin 1, pin 2

12. Buzzer

    • Description: Piezoelectric buzzer.
    • Pins: PIN, GND

13. Voltage Regulator

    • Description: Voltage regulator for stabilizing voltage.
    • Pins: IN, GND, OUT

Wiring Details

Arduino UNO

• 5V connected to Resistor (200 Ohms) pin2 and Resistor (200 Ohms) pin2.
• GND connected to Resistor (10k Ohms) pin2, Resistor (10k Ohms) pin2, Resistor (1k Ohms) pin1, Mosfet Source, DC Motor pin 2, Mosfet Source, Charge Controller GND, Mosfet Source, Battery 12V -, and Buzzer GND.
• Vin connected to Charge Controller BAT, Diode cathode, Battery 12V +, LED Strip +12V, and Resistor (10k Ohms) pin2.
• A0 connected to Resistor (1k Ohms) pin2 and Resistor (10k Ohms) pin1.
• D11 connected to Mosfet Gate.
• D10 connected to Mosfet Gate.
• D9 connected to Mosfet Gate.
• D8 connected to Buzzer PIN.
• D4 connected to Pushbutton Pin 4 (out).
• D2 connected to Pushbutton Pin 4 (out), Resistor (10k Ohms) pin1, and Resistor (10k Ohms) pin1.

LED Strip

• B connected to Mosfet Drain.
• R connected to Mosfet Drain.
• G connected to Mosfet Drain.

Pushbutton

• Pin 4 (out) connected to Arduino UNO D4.
• Pin 4 (out) connected to Arduino UNO D2, Resistor (10k Ohms) pin1, and Resistor (10k Ohms) pin1.
• Pin 2 (in) connected to Resistor (200 Ohms) pin1.
• Pin 2 (in) connected to Resistor (200 Ohms) pin1.

Resistor (10k Ohms)

• pin2 connected to Arduino UNO GND.
• pin2 connected to Arduino UNO GND.
• pin1 connected to Resistor (1k Ohms) pin1.
• pin2 connected to Arduino UNO Vin.

Resistor (200 Ohms)

• pin2 connected to Arduino UNO 5V.
• pin2 connected to Arduino UNO 5V.
• pin1 connected to Pushbutton Pin 2 (in).
• pin1 connected to Pushbutton Pin 2 (in).

Battery 12V

• + connected to Arduino UNO Vin, Charge Controller BAT, Diode cathode, LED Strip +12V, and Resistor (10k Ohms) pin2.
• - connected to Arduino UNO GND, Mosfet Source, DC Motor pin 2, Mosfet Source, Charge Controller GND, Mosfet Source, and Buzzer GND.

Mosfet

• Source connected to Arduino UNO GND, DC Motor pin 2, Charge Controller GND, Battery 12V -, and Buzzer GND.
• Gate connected to Arduino UNO D11.
• Gate connected to Arduino UNO D10.
• Gate connected to Arduino UNO D9.
• Drain connected to LED Strip B.
• Drain connected to LED Strip R.
• Drain connected to LED Strip G.

Charge Controller

• GND connected to Arduino UNO GND, Mosfet Source, DC Motor pin 2, Mosfet Source, Battery 12V -, and Buzzer GND.
• BAT connected to Arduino UNO Vin, Diode cathode, Battery 12V +, LED Strip +12V, and Resistor (10k Ohms) pin2.
• Vin connected to Solar Cell +.

Diode

• cathode connected to Arduino UNO Vin, Charge Controller BAT, Battery 12V +, LED Strip +12V, and Resistor (10k Ohms) pin2.
• anode connected to DC Motor pin 1.

Solar Cell

• - connected to Charge Controller GND.
• + connected to Charge Controller Vin.

DC Motor

• pin 2 connected to Arduino UNO GND, Mosfet Source, Charge Controller GND, Battery 12V -, and Buzzer GND.
• pin 1 connected to Diode anode.

Buzzer

• PIN connected to Arduino UNO D8.
• GND connected to Arduino UNO GND, Mosfet Source, DC Motor pin 2, Charge Controller GND, Battery 12V -, and Buzzer GND.

Voltage Regulator

• IN not connected.
• GND not connected.
• OUT not connected.

Code Documentation

// Pin definitions
const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;
const int button1Pin = 2;
const int button2Pin = 4;
const int buzzerPin = 8;

const int batteryPin = A0;  // Battery voltage measurement pin
float batteryVoltage = 0.0;
int batteryLevel = 0;

// States
int button1State = 0;
int button1LastState = 0;
int lightMode = 0;

int button2State = 0;
int sosActive = 0;

void setup() {
    Serial.begin(9600);  // Start serial communication
    // Set pin modes
    pinMode(redPin, OUTPUT);
    pinMode(greenPin, OUTPUT);
    pinMode(bluePin, OUTPUT);
    pinMode(button1Pin, INPUT);
    pinMode(button2Pin, INPUT);
    pinMode(buzzerPin