Circuit Documentation

Summary

This circuit involves an ESP32 microcontroller interfacing with various components including LEDs, a relay, a DC motor, an LCD display, and a battery holder. The ESP32 controls the LEDs, relay, and LCD display, while the relay is used to control the DC motor. The circuit is powered by a 18650 battery.

Component List

1. 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

2. 1-Channel Relay (5V 10A)

   • Description: A relay module used to control high-power devices.
   • Pins: NC, signal, C, power, NO, ground

3. DC Motor

   • Description: A simple DC motor.
   • Pins: pin 1, pin 2

4. 18650 in holder

   • Description: A battery holder for a 18650 lithium-ion battery.
   • Pins: GND, VCC

5. 16x2 I2C LCD

   • Description: A 16x2 character LCD display with I2C interface.
   • Pins: GND, VCC, SDA, SCL

6. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: cathode, anode

7. LED: Two Pin (green)

   • Description: A green LED.
   • Pins: cathode, anode

8. LED: Two Pin (yellow)

   • Description: A yellow LED.
   • Pins: cathode, anode

Wiring Details

ESP32 (30 pin)

• D32: Connected to the cathode of the green LED.
• D33: Connected to the cathode of the red LED.
• D25: Connected to the cathode of the yellow LED.
• GND: Connected to the anodes of the red, green, and yellow LEDs.
• Vin: Connected to VCC of the 16x2 I2C LCD.
• D22: Connected to SCL of the 16x2 I2C LCD.
• D21: Connected to SDA of the 16x2 I2C LCD.
• D5: Connected to the signal pin of the 1-Channel Relay.
• GND: Connected to GND of the 16x2 I2C LCD and ground of the 1-Channel Relay.
• 3V3: Connected to the power pin of the 1-Channel Relay.

1-Channel Relay (5V 10A)

• signal: Connected to D5 of the ESP32.
• ground: Connected to GND of the ESP32.
• power: Connected to 3V3 of the ESP32.
• C: Connected to pin 1 of the DC Motor.
• NO: Connected to VCC of the 18650 in holder.

DC Motor

• pin 1: Connected to C of the 1-Channel Relay.
• pin 2: Connected to GND of the 18650 in holder.

18650 in holder

• VCC: Connected to NO of the 1-Channel Relay.
• GND: Connected to pin 2 of the DC Motor.

16x2 I2C LCD

• VCC: Connected to Vin of the ESP32.
• SCL: Connected to D22 of the ESP32.
• SDA: Connected to D21 of the ESP32.
• GND: Connected to GND of the ESP32 and ground of the 1-Channel Relay.

LED: Two Pin (red)

• cathode: Connected to D33 of the ESP32.
• anode: Connected to GND of the ESP32.

LED: Two Pin (green)

• cathode: Connected to D32 of the ESP32.
• anode: Connected to GND of the ESP32.

LED: Two Pin (yellow)

• cathode: Connected to D25 of the ESP32.
• anode: Connected to GND of the ESP32.

Code

No code is provided for this circuit.