Circuit Documentation

Summary

This circuit consists of an ESP32 microcontroller controlling ten red LEDs through GPIO pins. Each LED is connected in series with a 220 Ohm resistor to limit the current. The microcontroller is programmed to light up the LEDs in a specific pattern.

Component List

ESP32 (30 pin)

• Description: A powerful microcontroller with built-in 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

LED: Two Pin (red)

• Description: A standard red LED with two pins: anode and cathode.
• Pins: cathode, anode

Resistor

• Description: A 220 Ohm resistor used to limit the current through the LEDs.
• Pins: pin1, pin2
• Properties:
  • Resistance: 220 Ohms

Wiring Details

ESP32 (30 pin)

• D21 connected to anode of LED 1
• D19 connected to anode of LED 2
• D18 connected to anode of LED 3
• D5 connected to anode of LED 4
• D4 connected to anode of LED 5
• D26 connected to anode of LED 6
• D32 connected to anode of LED 7
• D33 connected to anode of LED 8
• D25 connected to anode of LED 9
• D14 connected to anode of LED 10
• GND connected to pin1 of all resistors

LED: Two Pin (red)

• LED 1:

  • anode connected to D21 of ESP32
  • cathode connected to pin2 of Resistor 1

• LED 2:

  • anode connected to D19 of ESP32
  • cathode connected to pin2 of Resistor 2

• LED 3:

  • anode connected to D18 of ESP32
  • cathode connected to pin2 of Resistor 3

• LED 4:

  • anode connected to D5 of ESP32
  • cathode connected to pin2 of Resistor 4

• LED 5:

  • anode connected to D4 of ESP32
  • cathode connected to pin2 of Resistor 5

• LED 6:

  • anode connected to D26 of ESP32
  • cathode connected to pin2 of Resistor 6

• LED 7:

  • anode connected to D32 of ESP32
  • cathode connected to pin2 of Resistor 7

• LED 8:

  • anode connected to D33 of ESP32
  • cathode connected to pin2 of Resistor 8

• LED 9:

  • anode connected to D25 of ESP32
  • cathode connected to pin2 of Resistor 9

• LED 10:

  • anode connected to D14 of ESP32
  • cathode connected to pin2 of Resistor 10

Resistor

• Resistor 1:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 1

• Resistor 2:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 2

• Resistor 3:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 3

• Resistor 4:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 4

• Resistor 5:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 5

• Resistor 6:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 6

• Resistor 7:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 7

• Resistor 8:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 8

• Resistor 9:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 9

• Resistor 10:

  • pin1 connected to GND of ESP32
  • pin2 connected to cathode of LED 10

Code Documentation

int L1 = 14;
int L2 = 25;
int L3 = 33;
int L4 = 32;
int L5 = 26;
int L6 = 4;
int L7 = 5;
int L8 = 18;
int L9 = 19;
int L10 = 21;

void setup() {
  pinMode(L1, OUTPUT);
  pinMode(L2, OUTPUT);
  pinMode(L3, OUTPUT);
  pinMode(L4, OUTPUT);
  pinMode(L5, OUTPUT);
  pinMode(L6, OUTPUT);
  pinMode(L7, OUTPUT);
  pinMode(L8, OUTPUT);
  pinMode(L9, OUTPUT);
  pinMode(L10, OUTPUT);
}

void loop(){
  //pattern 1
  digitalWrite(L1, HIGH);
  delay(200);
  digitalWrite(L2, HIGH);
  delay(200);
  digitalWrite(L3, HIGH);
  delay(200);
  digitalWrite(L4, HIGH);
  delay(200);
  digitalWrite(L5, HIGH);
  delay(200);
  digitalWrite(L6, HIGH);
  delay(200);
  digitalWrite(L7, HIGH);
  delay(200);
  digitalWrite(L8, HIGH);
  delay(200);
  digitalWrite(L9, HIGH);
  delay(200);
  digitalWrite(L10, HIGH);
  delay(1000);

  // pattern 2
  digitalWrite(L1, LOW);
  delay(200);
  digitalWrite(L2, LOW);
  delay(200);
  digitalWrite(L3, LOW);
  delay(200);
  digitalWrite(L4, LOW);
  delay(200);
  digitalWrite(L5, LOW);
  delay(200);
  digitalWrite(L6, LOW);
  delay(200);
  digitalWrite(L7, LOW);
  delay(200);
  digitalWrite(L8, LOW);
  delay(200);
  digitalWrite(L9, LOW);
  delay(200);
  digitalWrite(L10, LOW);
  delay(1000);
}

This code sets up the GPIO pins connected to the LEDs as outputs and then runs a loop that lights up the LEDs in a sequence with a delay between each LED turning on and off.