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Arduino UNO Light-Sensitive Servo Control with LED Indicator

Image of Arduino UNO Light-Sensitive Servo Control with LED Indicator

Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, a servo motor, an LED, a photocell (LDR), and two resistors. The Arduino UNO controls the servo motor and reads the photocell's resistance to adjust the LED's brightness. The circuit is powered by the Arduino's 5V supply.

Component List

  1. Arduino UNO

    • Description: A 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. Servo

    • Description: A small motor with a feedback mechanism for precise control.
    • Pins: GND, VCC, PWM

  3. LED: Two Pin (white)

    • Description: A white LED with two pins.
    • Pins: cathode, anode

  4. Resistor (330 Ohms)

    • Description: A resistor with a resistance of 330 Ohms.
    • Pins: pin1, pin2

  5. Photocell (LDR)

    • Description: A light-dependent resistor that changes resistance based on light intensity.
    • Pins: pin 0, pin 1

  6. Resistor (1500 Ohms)

    • Description: A resistor with a resistance of 1500 Ohms.
    • Pins: pin1, pin2

Wiring Details

Arduino UNO

  • 5V connected to:

    • Servo (VCC)
    • LED (anode)
    • Photocell (pin 1)

  • GND connected to:

    • Resistor (330 Ohms) (pin1)
    • Resistor (1500 Ohms) (pin1)
    • Servo (GND)

  • D9 connected to:

    • Servo (PWM)

  • A0 connected to:

    • Photocell (pin 0)
    • Resistor (1500 Ohms) (pin2)

Servo

  • VCC connected to:

    • Arduino UNO (5V)

  • GND connected to:

    • Arduino UNO (GND)

  • PWM connected to:

    • Arduino UNO (D9)

LED: Two Pin (white)

  • anode connected to:

    • Arduino UNO (5V)

  • cathode connected to:

    • Resistor (330 Ohms) (pin2)

Resistor (330 Ohms)

  • pin1 connected to:

    • Arduino UNO (GND)

  • pin2 connected to:

    • LED (cathode)

Photocell (LDR)

  • pin 0 connected to:

    • Resistor (1500 Ohms) (pin2)
    • Arduino UNO (A0)

  • pin 1 connected to:

    • Arduino UNO (5V)

Resistor (1500 Ohms)

  • pin1 connected to:

    • Arduino UNO (GND)

  • pin2 connected to:

    • Photocell (pin 0)
    • Arduino UNO (A0)

Documented Code

sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

documentation.txt