Circuit Documentation

Summary

This circuit consists of an Arduino Nano microcontroller, an APDS-9960 RGB and Gesture Sensor, and a Micro Servo 9G. The Arduino Nano reads gesture inputs from the APDS-9960 sensor and controls the position of the Micro Servo based on specific gesture patterns.

Component List

APDS-9960 RGB and Gesture Sensor

• Description: A sensor capable of detecting RGB color, ambient light, and gestures.
• Pins: VL, GND, VCC, SDA, SCL, INT

Arduino Nano

• Description: A small, complete, and breadboard-friendly microcontroller board based on the ATmega328P.
• Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

Micro Servo 9G

• Description: A small servo motor used for precise control of angular position.
• Pins: GND, +5V, PWM

Wiring Details

APDS-9960 RGB and Gesture Sensor

• GND connected to Arduino Nano GND
• VCC connected to Arduino Nano VIN
• SDA connected to Arduino Nano A6
• SCL connected to Arduino Nano A5

Arduino Nano

• GND connected to APDS-9960 GND
• VIN connected to APDS-9960 VCC
• A6 connected to APDS-9960 SDA
• A5 connected to APDS-9960 SCL
• GND connected to Micro Servo 9G GND
• VIN connected to Micro Servo 9G +5V
• D9 connected to Micro Servo 9G PWM

Micro Servo 9G

• GND connected to Arduino Nano GND
• +5V connected to Arduino Nano VIN
• PWM connected to Arduino Nano D9

Code Documentation

#include <Wire.h>
#include <Adafruit_APDS9960.h>
#include <Servo.h>

Adafruit_APDS9960 apds;
Servo myservo;

const int servoPin = 9;
int upCount = 0;
int leftCount = 0;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  myservo.attach(servoPin);
  myservo.write(0); // Initialize servo to 0°

  if (!apds.begin()) {
    Serial.println("Failed to initialize APDS-9960 sensor!");
    while (1);
  }
  apds.enableGesture(true);
}

void loop() {
  if (apds.gestureValid()) {
    int gesture = apds.readGesture();
    switch (gesture) {
      case APDS9960_UP:
        upCount++;
        break;
      case APDS9960_DOWN:
        myservo.write(0); // Reset servo to 0°
        upCount = 0;
        leftCount = 0;
        break;
      case APDS9960_LEFT:
        leftCount++;
        break;
      case APDS9960_RIGHT:
        // No action for RIGHT gesture
        break;
    }
    if (upCount == 2 && leftCount == 1) {
      myservo.write(90); // Rotate servo to 90°
      upCount = 0;
      leftCount = 0;
    }
  }
}

Code Explanation

• Libraries Included:

  • Wire.h: For I2C communication.
  • Adafruit_APDS9960.h: For interfacing with the APDS-9960 sensor.
  • Servo.h: For controlling the servo motor.

• Global Variables:

  • Adafruit_APDS9960 apds;: Object for the APDS-9960 sensor.
  • Servo myservo;: Object for the servo motor.
  • const int servoPin = 9;: Pin number for the servo motor.
  • int upCount = 0;: Counter for UP gestures.
  • int leftCount = 0;: Counter for LEFT gestures.

• Setup Function:

  • Initializes serial communication at 9600 baud.
  • Initializes I2C communication.
  • Attaches the servo motor to pin 9 and sets its initial position to 0°.
  • Initializes the APDS-9960 sensor and enables gesture detection.

• Loop Function:

  • Checks if a valid gesture is detected.
  • Reads the gesture and updates the counters based on the gesture type.
  • If two UP gestures followed by one LEFT gesture are detected, the servo rotates to 90°.