Cirkit Designer LogoCirkit DesignerYour all-in-one circuit design IDE Launch Cirkit Designer App

Arduino UNO and OV7670 Camera Module with Pushbutton Control

View and Edit Project In Cirkit DesignerImage of Arduino UNO and OV7670 Camera Module with Pushbutton Control

Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfaced with an OV7670 camera module and a pushbutton. The camera module is powered on when the pushbutton is pressed. The circuit includes several resistors to manage voltage levels and ensure proper operation of the components.

Component List

  1. Resistor (4700 Ohms)

    • Pins: pin1, pin2
    • Description: General-purpose resistor
    • Purpose: Voltage regulation

  2. Resistor (200 Ohms)

    • Pins: pin1, pin2
    • Description: General-purpose resistor
    • Purpose: Voltage regulation

  3. Arduino UNO

    • 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
    • Description: Microcontroller board
    • Purpose: Central control unit

  4. OV7670 Camera Module

    • Pins: RET, PWDN, D1, D0, D3, D2, D4, D5, D6, PLK, XLK, D7, VS, HS, SCL, SDA, 3.3V, DGND
    • Description: Camera module
    • Purpose: Capture images

  5. Resistor (10000 Ohms)

    • Pins: pin1, pin2
    • Description: General-purpose resistor
    • Purpose: Voltage regulation

  6. Pushbutton

    • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)
    • Description: Momentary pushbutton switch
    • Purpose: User input to control the camera module

Wiring Details

Resistor (4700 Ohms)

Resistor (200 Ohms)

Arduino UNO

OV7670 Camera Module

Resistor (10000 Ohms)

Pushbutton

Code Documentation

/*
 * This Arduino sketch controls an OV7670 camera module. The camera is powered
 * on when a pushbutton is pressed. The pushbutton is connected to digital pin
 * D1 and the camera's power-down pin (PWDN) is connected to GND through a
 * resistor. The camera's other pins are connected to the Arduino as specified
 * in the circuit design.
 */

// Pin definitions
#define BUTTON_PIN 1  // Pin connected to the pushbutton
#define CAMERA_PWDN_PIN 7  // Pin connected to the camera's PWDN pin

void setup() {
  pinMode(BUTTON_PIN, INPUT);  // Set button pin as input
  pinMode(CAMERA_PWDN_PIN, OUTPUT);  // Set camera PWDN pin as output
  digitalWrite(CAMERA_PWDN_PIN, HIGH);  // Initially turn off the camera
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);  // Read the button state
  if (buttonState == HIGH) {
    digitalWrite(CAMERA_PWDN_PIN, LOW);  // Turn on the camera
  } else {
    digitalWrite(CAMERA_PWDN_PIN, HIGH);  // Turn off the camera
  }
  delay(100);  // Debounce delay
}

This code initializes the pushbutton and camera power-down pin, and continuously checks the state of the pushbutton to control the power state of the camera. When the button is pressed, the camera is powered on; otherwise, it remains off.