Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control multiple 12V geared motors, a servo motor, and a water pump using an ESP32 microcontroller. The circuit includes a motor driver (L298N), a voltage regulator, a 5V relay, and a battery as the power source.

Component List

1. L298N DC Motor Driver

   • Description: Dual H-Bridge motor driver for controlling DC motors.
   • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

2. 12V Geared Motor

   • Description: High torque motor for various applications.
   • Pins: Terminal 1, Terminal 2

3. Battery

   • Description: Power source for the circuit.
   • Pins: -, +

4. Voltage Regulator

   • Description: Regulates voltage to a stable 5V output.
   • Pins: GND, IN, OUT

5. ESP32

   • Description: Microcontroller with Wi-Fi and Bluetooth capabilities.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT

6. Tower Pro SG90 Servo

   • Description: Small servo motor for precise control.
   • Pins: Signal, +5V, GND

7. Water Pump

   • Description: Pump for moving water.
   • Pins: VCC, GND

8. 5V Relay

   • Description: Relay for switching high power devices.
   • Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC

Wiring Details

L298N DC Motor Driver

• IN1 connected to ESP32 D25
• IN2 connected to ESP32 D26
• IN3 connected to ESP32 D14
• IN4 connected to ESP32 D27
• ENA connected to ESP32 D5
• ENB connected to ESP32 D18
• GND connected to ESP32 GND, Battery -, Tower Pro SG90 Servo GND, Voltage Regulator GND, 5V Relay Normally Closed, Water Pump GND
• 5V connected to ESP32 VIN, 5V Relay VCC
• 12V connected to Battery +, Voltage Regulator IN
• OUT1 connected to 12V Geared Motor Terminal 2 (two motors)
• OUT2 connected to 12V Geared Motor Terminal 1 (two motors)
• OUT3 connected to 12V Geared Motor Terminal 2 (two motors)
• OUT4 connected to 12V Geared Motor Terminal 1 (two motors)

12V Geared Motor

• Terminal 1 connected to L298N DC Motor Driver OUT2 (two motors), L298N DC Motor Driver OUT4 (two motors)
• Terminal 2 connected to L298N DC Motor Driver OUT1 (two motors), L298N DC Motor Driver OUT3 (two motors)

Battery

• - connected to ESP32 GND, Tower Pro SG90 Servo GND, Voltage Regulator GND, 5V Relay Normally Closed, L298N DC Motor Driver GND, Water Pump GND
• + connected to Voltage Regulator IN, L298N DC Motor Driver 12V

Voltage Regulator

• GND connected to ESP32 GND, Battery -, Tower Pro SG90 Servo GND, 5V Relay Normally Closed, L298N DC Motor Driver GND, Water Pump GND
• IN connected to Battery +, L298N DC Motor Driver 12V
• OUT connected to Tower Pro SG90 Servo +5V, 5V Relay Common terminal

ESP32

• D25 connected to L298N DC Motor Driver IN1
• D26 connected to L298N DC Motor Driver IN2
• D27 connected to L298N DC Motor Driver IN4
• D14 connected to L298N DC Motor Driver IN3
• D5 connected to L298N DC Motor Driver ENA
• D18 connected to L298N DC Motor Driver ENB
• D19 connected to Tower Pro SG90 Servo Signal
• D21 connected to 5V Relay In
• GND connected to Battery -, Tower Pro SG90 Servo GND, Voltage Regulator GND, 5V Relay Normally Closed, L298N DC Motor Driver GND, Water Pump GND
• VIN connected to 5V Relay VCC, L298N DC Motor Driver 5V

Tower Pro SG90 Servo

• Signal connected to ESP32 D19
• +5V connected to Voltage Regulator OUT, 5V Relay Common terminal
• GND connected to ESP32 GND, Battery -, Voltage Regulator GND, 5V Relay Normally Closed, L298N DC Motor Driver GND, Water Pump GND

Water Pump

• VCC connected to 5V Relay Normally Open
• GND connected to ESP32 GND, Battery -, Tower Pro SG90 Servo GND, Voltage Regulator GND, 5V Relay Normally Closed, L298N DC Motor Driver GND

5V Relay

• Normally Open connected to Water Pump VCC
• Common terminal connected to Voltage Regulator OUT, Tower Pro SG90 Servo +5V
• Normally Closed connected to ESP32 GND, Battery -, Tower Pro SG90 Servo GND, Voltage Regulator GND, L298N DC Motor Driver GND, Water Pump GND
• In connected to ESP32 D21
• GND connected to ESP32 GND, Battery -, Tower Pro SG90 Servo GND, Voltage Regulator GND, L298N DC Motor Driver GND, Water Pump GND
• VCC connected to ESP32 VIN, L298N DC Motor Driver 5V

Code

No code is provided for this circuit.