Circuit Documentation

Summary of the Circuit

This circuit is designed around the ESP32 microcontroller, which is a versatile and powerful chip with Wi-Fi and Bluetooth capabilities. The circuit includes a simple LED indicator and a current-limiting resistor, powered by a 5V battery. The LED is controlled by the ESP32, which toggles the LED on and off with a 2-second interval, demonstrating basic digital output functionality.

Component List

ESP32 (30 pin)

• Description: A 30-pin microcontroller with Wi-Fi and Bluetooth capabilities.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3
• Purpose: Acts as the central processing unit of the circuit, controlling the LED.

LED: Two Pin (red)

• Description: A basic red LED with two pins: anode and cathode.
• Pins: cathode, anode
• Purpose: Serves as a visual indicator, toggling on and off as controlled by the ESP32.

Resistor

• Description: A passive two-pin component that limits the current through the LED.
• Pins: pin1, pin2
• Properties: Resistance - 200 Ohms
• Purpose: Prevents excessive current from flowing through the LED, which could otherwise damage it.

5v Battery

• Description: A power source providing a constant 5V.
• Pins: + (positive), - (negative)
• Purpose: Supplies the necessary power to the circuit.

Wiring Details

ESP32 (30 pin)

• GND: Connected to the negative terminal of the battery and one pin of the resistor.
• Vin: Connected to the positive terminal of the battery.
• D2: Connected to the cathode of the LED.

LED: Two Pin (red)

• Cathode: Connected to pin D2 of the ESP32.
• Anode: Connected to one pin of the resistor.

Resistor

• Pin1: Connected to the GND pin of the ESP32.
• Pin2: Connected to the anode of the LED.

5v Battery

• + (Positive): Connected to the Vin pin of the ESP32.
• - (Negative): Connected to the GND pin of the ESP32.

Documented Code

// Code for controlling an LED using ESP32
int ledpin = 2; // LED connected to digital pin 2

void setup() {
    pinMode(ledpin, OUTPUT); // Initialize digital pin as an output
}

void loop() {
    digitalWrite(ledpin, HIGH); // Turn the LED on
    delay(2000);                // Wait for 2 seconds

    digitalWrite(ledpin, LOW);  // Turn the LED off
    delay(2000);                // Wait for 2 seconds
}

File Name: sketch.ino

Description: This code configures pin D2 of the ESP32 as an output to control the LED. In the loop function, it turns the LED on for 2 seconds and then off for 2 seconds, creating a blinking effect.