+--|>|--+
      |       |
      |      === C1
      |       |
      LED     |
      |       |
      +-------+
      |
     === R1
      |
     GND

Here are the components you will need:

• LED (any color)
• Capacitor (between 1uF and 100uF)
• Resistor (between 100 ohms and 1k ohms)
• Battery or power supply (DC voltage between 3V and 12V)

Here's how the circuit works:

1. When the power supply is turned on, the capacitor C1 starts to charge through the resistor R1.
2. As the capacitor charges, the voltage across it gradually increases.
3. When the voltage across the capacitor reaches the forward voltage of the LED, the LED turns on and the capacitor discharges through the LED.
4. As the capacitor discharges, the voltage across it decreases until it's no longer enough to keep the LED on.
5. When the LED turns off, the capacitor starts charging again and the cycle repeats.

The flashing rate of the LED can be adjusted by changing the values of the capacitor and resistor. A larger capacitor or a larger resistor will result in a slower flashing rate, while a smaller capacitor or a smaller resistor will result in a faster flashing rate.

function calculateLoan() {
  var principal = document.getElementById("principal").value;
  var interestRate = document.getElementById("interestRate").value;
  var term = document.getElementById("term").value;
  
  var monthlyRate = interestRate/1200;
  var monthlyPayment = (principal * monthlyRate) / (1 - Math.pow(1 + monthlyRate, -term));
  
  var balance = principal;
  var table = "<table><tr><th>Month</th><th>Payment</th><th>Principal</th><th>Interest</th><th>Balance</th></tr>";
  
  for (var i = 1; i <= term; i++) {
    var interest = balance * monthlyRate;
    var principalPaid = monthlyPayment - interest;
    balance -= principalPaid;
    
    table += "<tr><td>" + i + "</td><td>$" + monthlyPayment.toFixed(2) + "</td><td>$" + principalPaid.toFixed(2) + "</td><td>$" + interest.toFixed(2) + "</td><td>$" + balance.toFixed(2) + "</td></tr>";
  }
  
  table += "</table>";
  document.getElementById("output").innerHTML = table;
}

This code takes input values for the loan principal, interest rate, and term from the user, and calculates the monthly payment, principal paid, interest paid, and loan balance for each month using a for loop. The output is displayed in an HTML table using the innerHTML property. The toFixed() method is used to format the output to two decimal places.

You can use this code in an HTML document with a form that has input fields for the loan details and a button that calls the calculateLoan() function. For example:

<form>
  <label for="principal">Loan Amount:</label>
  <input type="text" id="principal" name="principal"><br>

  <label for="interestRate">Interest Rate:</label>
  <input type="text" id="interestRate" name="interestRate"><br>

  <label for="term">Loan Term (months):</label>
  <input type="text" id="term" name="term"><br>

  <button type="button" onclick="calculateLoan()">Calculate</button>
</form>

<div id="output"></div>

This code will display the loan calculator form and the output table in the HTML document.

<?php
$principal = 100000; // loan amount
$interestRate = 5; // interest rate
$term = 360; // loan term in months
$monthlyPayment = ($principal * ($interestRate/1200)) / (1 - pow(1 + ($interestRate/1200), -$term));
$balance = $principal;

echo "<table>";
echo "<tr><th>Month</th><th>Payment</th><th>Principal</th><th>Interest</th><th>Balance</th></tr>";
for ($i = 1; $i <= $term; $i++) {
    $interest = $balance * ($interestRate/1200);
    $principal = $monthlyPayment - $interest;
    $balance = $balance - $principal;
    echo "<tr><td>".$i."</td><td>$".number_format($monthlyPayment, 2)."</td><td>$".number_format($principal, 2)."</td><td>$".number_format($interest, 2)."</td><td>$".number_format($balance, 2)."</td></tr>";
}
echo "</table>";
?>

This code calculates the monthly payment for a loan using the given principal, interest rate, and term in months. It then iterates over the loan term, calculating the principal, interest, and balance for each month, and displays the results in a table. The number_format() function is used to format the output to two decimal places. You can modify the values of $principal, $interestRate, and $term to fit your specific loan details.

Example: 

#include "esp_camera.h"
#include "WiFi.h"

// Replace with your network credentials
const char* ssid = "YourSSID";
const char* password = "YourWiFiPassword";

void setup() {
  Serial.begin(115200);

  // Connect to Wi-Fi network
  WiFi.begin(ssid, password);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Wi-Fi connected successfully");

  // Initialize camera module
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = 5;
  config.pin_d1 = 18;
  config.pin_d2 = 19;
  config.pin_d3 = 21;
  config.pin_d4 = 36;
  config.pin_d5 = 39;
  config.pin_d6 = 34;
  config.pin_d7 = 35;
  config.pin_xclk = 0;
  config.pin_pclk = 22;
  config.pin_vsync = 25;
  config.pin_href = 23;
  config.pin_sscb_sda = 26;
  config.pin_sscb_scl = 27;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;
  
  // Start the camera
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  Serial.println("Camera init successful");

}

void loop() {
  // Capture a photo
  camera_fb_t * fb = NULL;
  fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Camera capture failed");
    return;
  }

  // Send the photo to a remote server
  WiFiClient client;
  if (client.connect("www.example.com", 80)) { // Replace with your server details
    String httpRequest = "POST /upload.php HTTP/1.1\r\n" +
                         "Host: www.example.com\r\n" +
                         "Content-Type: image/jpeg\r\n" +
                         "Content-Length: " + String(fb->len) + "\r\n\r\n";
    client.print(httpRequest);
    client.write(fb->buf, fb->len);
    Serial.println("Photo sent to server");
  } else {
    Serial.println("Failed to connect to server");
  }

  // Free the memory used by the photo buffer
  esp_camera_fb_return(fb);

  // Wait for 5 seconds before taking the next photo
  delay(5000);
}

This code connects the ESP32 CAM module to a WiFi network using the provided network credentials. It then initializes the camera module and captures a photo using the esp_camera_fb_get() function. The photo is sent to a remote server using a POST request with the WiFiClient class. Replace the server details with your own server address and the path to your PHP script for processing the image. The code then waits for 5 seconds before capturing the next photo. Note that you may need to adjust the camera configuration based on your module and adjust the delay time between photo captures based on your needs.