Circuit Documentation

Summary

This circuit design involves two HiLetGo ESP-32 microcontrollers, an INMP441 microphone, several Terminal PCB 2 Pin connectors, Motor Driver - N-Mos PWM Triggers, and Adafruit NeoPixel NeoMatrix 8x8 displays. The ESP-32 microcontrollers are used to control various components, including the microphone, motor drivers, and NeoPixel displays. The Terminal PCB 2 Pin connectors are used for power distribution and signal routing.

Component List

HiLetGo ESP-32

• Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities.
• Pins: 3.3, EN, GPIO36, GPIO39, GPIO34, GPIO35, GPIO32, GPIO33, GPIO25, GPIO26, GPIO27, GPIO14, GPIO12, GND, GPIO13, GPIO9, GPIO10, GPIO11, VIN, GPIO6, GPIO7, GPIO8, GPIO15, GPIO2, GPIO0, GPIO4, GPIO16, GPIO17, GPIO5, GPIO18, GPIO19, GPIO21, GPIO3, GPIO1, GPIO22, GPIO23

Terminal PCB 2 Pin

• Description: A simple 2-pin terminal block for easy connection and disconnection of wires.
• Pins: Pin A, Pin B

INMP441 FRONT MIC

• Description: A high-performance, low-power, digital-output omnidirectional MEMS microphone.
• Pins: L/R, WS, SCK, SD, VDD, GND

Motor Driver - N-Mos PWM Trigger

• Description: A motor driver module that uses N-MOSFETs for PWM control.
• Pins: + PWM, GND, OUT -, OUT +, DC OUT +, DC IN -

Adafruit NeoPixel NeoMatrix 8x8

• Description: An 8x8 matrix of individually addressable RGB LEDs.
• Pins: IN, VDD, GND, OUT

Wiring Details

HiLetGo ESP-32 (1)

• 3.3V: Connected to Pin B of Terminal PCB 2 Pin, VDD of INMP441 FRONT MIC
• GND: Connected to Pin B of Terminal PCB 2 Pin, L/R and GND of INMP441 FRONT MIC
• VIN: Connected to Pin A of Terminal PCB 2 Pin
• GPIO32: Connected to WS of INMP441 FRONT MIC
• GPIO14: Connected to SCK of INMP441 FRONT MIC
• GPIO15: Connected to SD of INMP441 FRONT MIC
• GPIO2: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin B of Terminal PCB 2 Pin
• GPIO4: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin A of Terminal PCB 2 Pin
• GPIO5: Connected to IN of Adafruit NeoPixel NeoMatrix 8x8, Pin B of Terminal PCB 2 Pin
• GPIO18: Connected to IN of Adafruit NeoPixel NeoMatrix 8x8, Pin A of Terminal PCB 2 Pin
• GPIO19: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin B of Terminal PCB 2 Pin
• GPIO21: Connected to Pin A of Terminal PCB 2 Pin

HiLetGo ESP-32 (2)

• 3.3V: Connected to Pin B of Terminal PCB 2 Pin, VDD of INMP441 FRONT MIC
• GND: Connected to Pin B of Terminal PCB 2 Pin, L/R and GND of INMP441 FRONT MIC
• VIN: Connected to Pin A of Terminal PCB 2 Pin
• GPIO32: Connected to WS of INMP441 FRONT MIC
• GPIO14: Connected to SCK of INMP441 FRONT MIC
• GPIO15: Connected to SD of INMP441 FRONT MIC
• GPIO2: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin B of Terminal PCB 2 Pin
• GPIO4: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin A of Terminal PCB 2 Pin
• GPIO5: Connected to IN of Adafruit NeoPixel NeoMatrix 8x8, Pin B of Terminal PCB 2 Pin
• GPIO18: Connected to IN of Adafruit NeoPixel NeoMatrix 8x8, Pin A of Terminal PCB 2 Pin
• GPIO19: Connected to + PWM of Motor Driver - N-Mos PWM Trigger, Pin B of Terminal PCB 2 Pin
• GPIO21: Connected to Pin A of Terminal PCB 2 Pin

INMP441 FRONT MIC

• VDD: Connected to 3.3V of HiLetGo ESP-32
• GND: Connected to GND of HiLetGo ESP-32, Pin B of Terminal PCB 2 Pin
• L/R: Connected to GND of HiLetGo ESP-32, Pin B of Terminal PCB 2 Pin
• WS: Connected to GPIO32 of HiLetGo ESP-32
• SCK: Connected to GPIO14 of HiLetGo ESP-32
• SD: Connected to GPIO15 of HiLetGo ESP-32

Motor Driver - N-Mos PWM Trigger (1)

• + PWM: Connected to GPIO2 of HiLetGo ESP-32, Pin B of Terminal PCB 2 Pin

Motor Driver - N-Mos PWM Trigger (2)

• + PWM: Connected to GPIO4 of HiLetGo ESP-32, Pin A of Terminal PCB 2 Pin

Motor Driver - N-Mos PWM Trigger (3)

• + PWM: Connected to GPIO19 of HiLetGo ESP-32, Pin B of Terminal PCB 2 Pin

Adafruit NeoPixel NeoMatrix 8x8 (1)

• IN: Connected to GPIO5 of HiLetGo ESP-32, Pin B of Terminal PCB 2 Pin

Adafruit NeoPixel NeoMatrix 8x8 (2)

• IN: Connected to GPIO18 of HiLetGo ESP-32, Pin A of Terminal PCB 2 Pin

Documented Code

HiLetGo ESP-32 (1)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

HiLetGo ESP-32 (2)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and documented code for the microcontrollers.