Circuit Documentation

Summary

This circuit interfaces an Arduino UNO with an APDS-9930 Proximity and Ambient Light Sensor. The Arduino UNO reads proximity data from the sensor and prints the values to the Serial Monitor.

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. APDS-9930 Proximity and Ambient Light Sensor

   • Description: A sensor that provides digital ambient light sensing (ALS), IR LED and a complete proximity detection system.
   • Pins: INT (not used), SDA, SCL, VCC (3.3V), GND, VL (not used)

Wiring Details

Arduino UNO

• 3.3V: Connected to VCC (3.3V) of the APDS-9930 Proximity and Ambient Light Sensor
• GND: Connected to GND of the APDS-9930 Proximity and Ambient Light Sensor
• SCL: Connected to SCL of the APDS-9930 Proximity and Ambient Light Sensor
• SDA: Connected to SDA of the APDS-9930 Proximity and Ambient Light Sensor

APDS-9930 Proximity and Ambient Light Sensor

• VCC (3.3V): Connected to 3.3V of the Arduino UNO
• GND: Connected to GND of the Arduino UNO
• SCL: Connected to SCL of the Arduino UNO
• SDA: Connected to SDA of the Arduino UNO

Code Documentation

/*
 * Arduino Sketch for interfacing with APDS-9930 Proximity and Ambient Light
 * Sensor. This code initializes the sensor and reads proximity data, printing
 * the values to the Serial Monitor.
 */

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

Adafruit_APDS9960 apds;

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    delay(10); // Wait for Serial to be ready
  }

  Serial.println("APDS-9930 Proximity Sensor Test");

  if (!apds.begin()) {
    Serial.println("Failed to initialize APDS-9930!");
    while (1);
  }
  Serial.println("APDS-9930 initialized.");

  apds.enableProximity(true);
}

void loop() {
  uint8_t proximity = apds.readProximity();
  Serial.print("Proximity: ");
  Serial.println(proximity);
  delay(500); // Delay for half a second
}

• Libraries Used:

  • Wire.h: For I2C communication.
  • Adafruit_APDS9960.h: For interfacing with the APDS-9930 sensor.

• Setup Function:

  • Initializes the Serial communication at 9600 baud rate.
  • Waits for the Serial to be ready.
  • Initializes the APDS-9930 sensor and enables proximity sensing.

• Loop Function:

  • Reads the proximity data from the sensor.
  • Prints the proximity data to the Serial Monitor.
  • Delays for half a second before the next reading.