Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an OLED display, a step-up boost converter, a TP4056 battery charger, an ESP32 microcontroller, an ultrasonic sensor, a motor driver, motors, a DFPlayer Mini, and a loudspeaker. The circuit is designed to interface these components to achieve a specific functionality, which is not explicitly described in the provided data.

Component List

1. 0.96" OLED

   • Pins: GND, VDD, SCK, SDA
   • Description: OLED display module for visual output.

2. Step Up Boost 3v-5v

   • Pins: Vi, GND, Vo
   • Description: Boost converter to step up voltage from 3V to 5V.

3. TP4056

   • Pins: OUT-, B-, B+, OUT+, IN-, IN+
   • Description: Lithium-ion battery charger module.

4. Li-ion battery 18650-2000mAh 3.7V 7.4WH

   • Pins: +, -
   • Description: Rechargeable lithium-ion battery.

5. Motor amarillo motorreductor hobby

   • Pins: vcc, GND
   • Description: Hobby motor with gearbox.

6. L298N DC motor driver

   • 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
   • Description: Dual H-Bridge motor driver.

7. ESP32

   • 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
   • Description: Wi-Fi and Bluetooth microcontroller.

8. HC-SR04 Ultrasonic Sensor

   • Pins: VCC, TRIG, ECHO, GND
   • Description: Ultrasonic distance sensor.

9. DFPlayer MINI

   • Pins: VCC, BUSY, RX, USB -, TX, USB +, DAC_R, K2/ADC_KEY, DAC_L, K1/ADC_KEY, SPK1, IO 2, GND, SPK2, IO 1
   • Description: MP3 player module.

10. Loudspeaker

    • Pins: pin1, pin2
    • Description: Audio output device.

Wiring Details

0.96" OLED

• GND connected to:

  • HC-SR04 Ultrasonic Sensor (GND)
  • L298N DC motor driver (GND)
  • ESP32 (GND)
  • Step Up Boost 3v-5v (GND)
  • TP4056 (OUT-)

• VDD connected to:

  • DFPlayer MINI (VCC)
  • HC-SR04 Ultrasonic Sensor (VCC)
  • L298N DC motor driver (5V)
  • ESP32 (VIN)
  • Step Up Boost 3v-5v (Vo)

• SCK connected to:

  • ESP32 (D21)

• SDA connected to:

  • ESP32 (D22)

Step Up Boost 3v-5v

• Vi connected to:

  • TP4056 (OUT+)

• GND connected to:

  • HC-SR04 Ultrasonic Sensor (GND)
  • L298N DC motor driver (GND)
  • ESP32 (GND)
  • 0.96" OLED (GND)
  • TP4056 (OUT-)

• Vo connected to:

  • DFPlayer MINI (VCC)
  • HC-SR04 Ultrasonic Sensor (VCC)
  • L298N DC motor driver (5V)
  • ESP32 (VIN)
  • 0.96" OLED (VDD)

TP4056

• OUT- connected to:

  • HC-SR04 Ultrasonic Sensor (GND)
  • L298N DC motor driver (GND)
  • ESP32 (GND)
  • 0.96" OLED (GND)
  • Step Up Boost 3v-5v (GND)

• B- connected to:

  • Li-ion battery 18650-2000mAh 3.7V 7.4WH (-)

• B+ connected to:

  • Li-ion battery 18650-2000mAh 3.7V 7.4WH (+)

• OUT+ connected to:

  • Step Up Boost 3v-5v (Vi)

Li-ion battery 18650-2000mAh 3.7V 7.4WH

• + connected to:

  • TP4056 (B+)

• - connected to:

  • TP4056 (B-)

Motor amarillo motorreductor hobby

• vcc connected to:

  • L298N DC motor driver (OUT4)
  • L298N DC motor driver (OUT1)

• GND connected to:

  • L298N DC motor driver (OUT3)
  • L298N DC motor driver (OUT2)

L298N DC motor driver

• OUT1 connected to:

  • Motor amarillo motorreductor hobby (vcc)

• OUT2 connected to:

  • Motor amarillo motorreductor hobby (GND)

• OUT3 connected to:

  • Motor amarillo motorreductor hobby (GND)

• OUT4 connected to:

  • Motor amarillo motorreductor hobby (vcc)

• GND connected to:

  • HC-SR04 Ultrasonic Sensor (GND)
  • ESP32 (GND)
  • 0.96" OLED (GND)
  • Step Up Boost 3v-5v (GND)
  • TP4056 (OUT-)

• 5V connected to:

  • DFPlayer MINI (VCC)
  • HC-SR04 Ultrasonic Sensor (VCC)
  • ESP32 (VIN)
  • 0.96" OLED (VDD)
  • Step Up Boost 3v-5v (Vo)

• ENA connected to:

  • ESP32 (D12)

• IN1 connected to:

  • ESP32 (D25)

• IN2 connected to:

  • ESP32 (D26)

• IN3 connected to:

  • ESP32 (D27)

• IN4 connected to:

  • ESP32 (D14)

• ENB connected to:

  • ESP32 (D13)

ESP32

• GND connected to:

  • HC-SR04 Ultrasonic Sensor (GND)
  • L298N DC motor driver (GND)
  • 0.96" OLED (GND)
  • Step Up Boost 3v-5v (GND)
  • TP4056 (OUT-)
  • DFPlayer MINI (GND)

• VIN connected to:

  • DFPlayer MINI (VCC)
  • HC-SR04 Ultrasonic Sensor (VCC)
  • L298N DC motor driver (5V)
  • 0.96" OLED (VDD)
  • Step Up Boost 3v-5v (Vo)

• D21 connected to:

  • 0.96" OLED (SCK)

• D22 connected to:

  • 0.96" OLED (SDA)

• D12 connected to:

  • L298N DC motor driver (ENA)

• D25 connected to:

  • L298N DC motor driver (IN1)

• D26 connected to:

  • L298N DC motor driver (IN2)

• D27 connected to:

  • L298N DC motor driver (IN3)

• D14 connected to:

  • L298N DC motor driver (IN4)

• D13 connected to:

  • L298N DC motor driver (ENB)

• D2 connected to:

  • DFPlayer MINI (RX)

• D4 connected to:

  • DFPlayer MINI (TX)

• D5 connected to:

  • HC-SR04 Ultrasonic Sensor (TRIG)

• D18 connected to:

  • HC-SR04 Ultrasonic Sensor (ECHO)

HC-SR04 Ultrasonic Sensor

• GND connected to:
  • L298N DC motor driver (GND)
  • ESP32 (GND)
  • 0.96" OLED (GND)
  • Step Up Boost 3v-5v (GND)