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Arduino UNO-Based IR Sensor Counter with Seven Segment Display

Image of Arduino UNO-Based IR Sensor Counter with Seven Segment Display

Circuit Documentation

Summary

This circuit is designed to count objects detected by an IR sensor and display the count on a seven-segment display. The circuit uses an Arduino UNO to read the IR sensor and generate clock pulses for a counter IC. The counter output is then decoded and displayed on a seven-segment display.

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. IR Sensor

    • Description: Infrared sensor for object detection.
    • Pins: out, gnd, vcc

  3. 74HC04

    • Description: Hex Inverter IC.
    • Pins: A1, Y1, A2, Y2, A3, Y3, GND, VCC, A6, Y6, A5, Y5, A4, Y4

  4. 74HC93

    • Description: 4-bit Binary Counter IC.
    • Pins: Clock 1, Reset 1, Reset 2, NC, VCC, Clock 0, Output 0, Output 3, GND, Output 1, Output 2

  5. 4511

    • Description: BCD to 7-Segment Latch/Decoder/Driver.
    • Pins: D1 (Input B), D2 (Input C), ~LT, ~BL, LE, D3 (Input D), D0 (Input A), GND, VCC, f, g, a, b, c, d, e

  6. Resistor

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

  7. Seven Segment Display (Wokwi Compatible)

    • Description: Seven-segment display for numerical output.
    • Pins: G, F, COM.2, B, A, E, D, COM.1, C, DP

  8. LED: Two Pin (green)

    • Description: Green LED.
    • Pins: cathode, anode

Wiring Details

Arduino UNO

  • GND: Connected to GND of 74HC04, 74HC93, 4511, IR Sensor, and Resistor (d2669fc2).
  • 5V: Connected to VCC of 74HC04, 74HC93, 4511, Seven Segment Display (COM.1), and IR Sensor.
  • D7: Connected to pin2 of Resistor (d2669fc2) and A1 of 74HC04.
  • D8: Connected to out of IR Sensor.

IR Sensor

  • out: Connected to D8 of Arduino UNO.
  • gnd: Connected to GND of Arduino UNO.
  • vcc: Connected to 5V of Arduino UNO.

74HC04

  • A1: Connected to pin2 of Resistor (d2669fc2) and D7 of Arduino UNO.
  • Y1: Connected to Clock 0 of 74HC93.
  • GND: Connected to GND of Arduino UNO.
  • VCC: Connected to 5V of Arduino UNO.

74HC93

  • Clock 0: Connected to Y1 of 74HC04.
  • Clock 1: Connected to D0 (Input A) of 4511.
  • Reset 1: Connected to GND of Arduino UNO.
  • Reset 2: Connected to GND of Arduino UNO.
  • GND: Connected to GND of Arduino UNO.
  • VCC: Connected to 5V of Arduino UNO.
  • Output 0: Connected to D0 (Input A) of 4511.
  • Output 1: Connected to D1 (Input B) of 4511.
  • Output 2: Connected to D2 (Input C) of 4511.
  • Output 3: Connected to D3 (Input D) of 4511.

4511

  • D0 (Input A): Connected to Output 0 of 74HC93.
  • D1 (Input B): Connected to Output 1 of 74HC93.
  • D2 (Input C): Connected to Output 2 of 74HC93.
  • D3 (Input D): Connected to Output 3 of 74HC93.
  • GND: Connected to GND of Arduino UNO.
  • VCC: Connected to 5V of Arduino UNO.
  • ~LT: Connected to 5V of Arduino UNO.
  • ~BL: Connected to 5V of Arduino UNO.
  • LE: Connected to 5V of Arduino UNO.
  • f: Connected to pin1 of Resistor (1e14dede).
  • g: Connected to pin1 of Resistor (9d493389).
  • a: Connected to pin2 of Resistor (e0210f7c).
  • b: Connected to pin2 of Resistor (22cb4453).
  • c: Connected to pin2 of Resistor (a7d30f7a).
  • d: Connected to pin1 of Resistor (7c5abf49).
  • e: Connected to pin1 of Resistor (4ad2ff8f).

Resistors

  • Resistor (d2669fc2):
    • pin1: Connected to cathode of LED.
    • pin2: Connected to A1 of 74HC04 and D7 of Arduino UNO.
  • Resistor (1e14dede):
    • pin1: Connected to f of 4511.
    • pin2: Connected to F of Seven Segment Display.
  • Resistor (9d493389):
    • pin1: Connected to g of 4511.
    • pin2: Connected to G of Seven Segment Display.
  • Resistor (e0210f7c):
    • pin1: Connected to a of 4511.
    • pin2: Connected to A of Seven Segment Display.
  • Resistor (22cb4453):
    • pin1: Connected to b of 4511.
    • pin2: Connected to B of Seven Segment Display.
  • Resistor (a7d30f7a):
    • pin1: Connected to c of 4511.
    • pin2: Connected to C of Seven Segment Display.
  • Resistor (7c5abf49):
    • pin1: Connected to d of 4511.
    • pin2: Connected to D of Seven Segment Display.
  • Resistor (4ad2ff8f):
    • pin1: Connected to e of 4511.
    • pin2: Connected to E of Seven Segment Display.

Seven Segment Display (Wokwi Compatible)

  • G: Connected to pin2 of Resistor (9d493389).
  • F: Connected to pin2 of Resistor (1e14dede).
  • COM.1: Connected to 5V of Arduino UNO.
  • B: Connected to pin1 of Resistor (22cb4453).
  • A: Connected to pin1 of Resistor (e0210f7c).
  • E: Connected to pin2 of Resistor (4ad2ff8f).
  • D: Connected to pin2 of Resistor (7c5abf49).
  • C: Connected to pin1 of Resistor (a7d30f7a).

LED: Two Pin (green)

  • cathode: Connected to pin1 of Resistor (d2669fc2).
  • anode: Connected to pin1 of Resistor (d2669fc2).

Code Documentation

Arduino UNO Code

const int IR_SENSOR_PIN = 8;  // Pin sensor IR
const int CLOCK_PIN = 7;      // Pin untuk clock pulse

// Variabel
int counter = 0;              // Hitungan counter dari 0-9
bool lastObstacleState = false; // Status deteksi sebelumnya
unsigned long debounceDelay = 50; // Waktu untuk mengatasi bouncing
unsigned long lastDebounceTime = 0; // Waktu terakhir bouncing terjadi

void setup() {
  // Inisialisasi pin
  pinMode(IR_SENSOR_PIN, INPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  
  // Mulai dengan clock rendah
  digitalWrite(CLOCK_PIN, LOW);
}

void loop() {
  // Baca sensor IR (LOW saat ada objek terdeteksi)
  bool obstacleDetected = (digitalRead(IR_SENSOR_PIN) == LOW);
  
  // Waktu sekarang
  unsigned long currentTime = millis();

  // Jika ini adalah deteksi baru dan