Circuit Documentation

Summary

This circuit is designed to control a motorized system using an ESP32 microcontroller, a TB6612FNG motor driver, and various other components. The system includes a 0.96" OLED display for visual feedback, a piezo buzzer for audio alerts, and a laser controlled by a MOSFET. The circuit also features a photocell (LDR) for light detection and a rocker switch for power control. The ESP32 is programmed to interface with a PS3 controller for remote control of the motors and laser.

Component List

1. DC Mini Metal Gear Motor

   • Description: A small DC motor with metal gears for increased torque.
   • Pins: IN1, IN2

2. TB6612FNG Motor Driver

   • Description: A dual motor driver capable of controlling two DC motors.
   • Pins: GND, B01, B02, A02, A01, VCC, VM, PWMB, BI2, BI1, STBY, AI1, AI2, PWMA

3. 0.96" OLED

   • Description: A small OLED display for visual feedback.
   • Pins: GND, VDD, SCK, SDA

4. ESP32 Devkit V1

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

5. Mosfet

   • Description: A transistor used for switching and amplifying electronic signals.
   • Pins: Gate, Drain, Source

6. 12v Battery

   • Description: A power source providing 12V DC.
   • Pins: +, -

7. Mini-360 DC-DC Step Down Buck Converter

   • Description: A voltage regulator that steps down 12V to a lower voltage.
   • Pins: Input -, Input +, Output +, Output -

8. LED bulb AC / Bombillo AC

   • Description: An AC-powered LED bulb.
   • Pins: +, -

9. Rocker Switch (SPST)

   • Description: A single-pole single-throw switch for power control.
   • Pins: 1, 2

10. Photocell (LDR)

    • Description: A light-dependent resistor used for light detection.
    • Pins: pin 0, pin 1

11. Piezo Buzzer

    • Description: A small speaker used for audio alerts.
    • Pins: pin 1, pin 2

12. Resistor (51k Ohms)

    • Description: A resistor with a resistance of 51k Ohms.
    • Pins: pin1, pin2

13. Resistor (220 Ohms)

    • Description: A resistor with a resistance of 220 Ohms.
    • Pins: pin1, pin2

Wiring Details

DC Mini Metal Gear Motor

• IN1 connected to B01 of TB6612FNG Motor Driver
• IN2 connected to B02 of TB6612FNG Motor Driver

TB6612FNG Motor Driver

• GND connected to - of 12v Battery and Input - of Mini-360 DC-DC Step Down Buck Converter
• B01 connected to IN1 of DC Mini Metal Gear Motor
• B02 connected to IN2 of DC Mini Metal Gear Motor
• A02 connected to IN1 of another DC Mini Metal Gear Motor
• A01 connected to IN2 of another DC Mini Metal Gear Motor
• VCC connected to 3V3 of ESP32 Devkit V1
• VM connected to 2 of Rocker Switch (SPST)
• PWMB connected to D5 of ESP32 Devkit V1
• BI2 connected to TX2 of ESP32 Devkit V1
• BI1 connected to RX2 of ESP32 Devkit V1
• STBY connected to 3V3 of ESP32 Devkit V1
• AI1 connected to D4 of ESP32 Devkit V1
• AI2 connected to D2 of ESP32 Devkit V1
• PWMA connected to D15 of ESP32 Devkit V1

0.96" OLED

• GND connected to GND of ESP32 Devkit V1
• VDD connected to 3V3 of ESP32 Devkit V1
• SCK connected to D22 of ESP32 Devkit V1
• SDA connected to D21 of ESP32 Devkit V1

ESP32 Devkit V1

• GND connected to GND of Piezo Buzzer, Source of Mosfet, pin1 of Resistor (51k Ohms), GND of 0.96" OLED, and Output - of Mini-360 DC-DC Step Down Buck Converter
• 3V3 connected to pin 1 of Photocell (LDR), STBY and VCC of TB6612FNG Motor Driver, + of LED bulb AC / Bombillo AC, and VDD of 0.96" OLED
• D22 connected to SCK of 0.96" OLED
• D21 connected to SDA of 0.96" OLED
• D5 connected to PWMB of TB6612FNG Motor Driver
• TX2 connected to BI2 of TB6612FNG Motor Driver
• RX2 connected to BI1 of TB6612FNG Motor Driver
• D4 connected to AI1 of TB6612FNG Motor Driver
• D2 connected to AI2 of TB6612FNG Motor Driver
• D15 connected to PWMA of TB6612FNG Motor Driver
• VIN connected to Output + of Mini-360 DC-DC Step Down Buck Converter
• D18 connected to Gate of Mosfet
• D12 connected to pin1 of Resistor (220 Ohms)
• D13 connected to pin 0 of Photocell (LDR) and pin2 of Resistor (51k Ohms)

Mosfet

• Gate connected to D18 of ESP32 Devkit V1
• Drain connected to - of LED bulb AC / Bombillo AC
• Source connected to GND of ESP32 Devkit V1

12v Battery

• + connected to 2 of Rocker Switch (SPST) and VM of TB6612FNG Motor Driver
• - connected to GND of TB6612FNG Motor Driver and Input - of Mini-360 DC-DC Step Down Buck Converter

Mini-360 DC-DC Step Down Buck Converter

• Input - connected to - of 12v Battery and GND of TB6612FNG Motor Driver
• Input + connected to 1 of Rocker Switch (SPST)
• Output + connected to VIN of ESP32 Devkit V1
• Output - connected to GND of ESP32 Devkit V1

LED bulb AC / Bombillo AC

• + connected to 3V3 of ESP32 Devkit V1
• - connected to Drain of Mosfet

Rocker Switch (SPST)

• 1 connected to Input + of Mini-360 DC-DC Step Down Buck Converter
• 2 connected to + of 12v Battery and VM of TB6612FNG Motor Driver

Photocell (LDR)

• pin 0 connected to D13 of ESP32 Devkit V1 and pin2 of Resistor (51k Ohms)
• pin 1 connected to 3V3 of ESP32 Devkit V1

Piezo Buzzer

• pin 1 connected to GND of ESP32 Devkit V1
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