Circuit Documentation

Summary

This circuit is designed to interface an ESP32 microcontroller with various components including an SN74AHC14 hex inverter, a ceramic capacitor, a resistor, an INMP441 microphone module, a WS2815 LED strip, and a 5A fuse for protection. The circuit is powered by a 12V power supply. The ESP32 is used to control the LED strip and to process signals from the INMP441 microphone module. The SN74AHC14 provides signal conditioning with its Schmitt-trigger inputs.

Component List

12V Power Supply

• Provides the main voltage source for the circuit.

SN74AHC14 Hex Inverter

• A hex inverter with Schmitt-trigger inputs used for signal conditioning.

Ceramic Capacitor

• A 0.1 µF capacitor, likely used for decoupling purposes.

Resistor

• A 62 Ohm resistor, possibly used for current limiting or pull-up/pull-down purposes.

ESP32 (30 pin)

• A microcontroller with Wi-Fi and Bluetooth capabilities, used as the main processing unit in the circuit.

INMP441 Microphone Module

• A digital I2S output microphone module for audio input.

WS2815 LED Strip

• An addressable LED strip that operates at 12V and is controlled via a digital signal.

5A Fuse

• Provides overcurrent protection for the circuit.

Splicing Connector WAGO 221

• A connector used for joining multiple wires together.

Wiring Details

12V Power Supply

• + connected to the input of the 5A fuse.
• - connected to Port 2 of the Splicing connector WAGO 221.

SN74AHC14 Hex Inverter

• Vcc connected to the Vin pin of the ESP32, Ceramic Capacitor pin1, and SN74AHC14 pins 6A, 5Y, 3A.
• GND connected to the GND pin of the ESP32, Ceramic Capacitor pin0, and SN74AHC14 pin 1A.
• 1Y connected to the D32 pin of the ESP32.
• 6Y connected to the GND pin of the INMP441, Port 4 of the Splicing connector WAGO 221, and GND pin of the ESP32.
• 2A connected to one pin of the Resistor.

Ceramic Capacitor

• pin0 connected to GND of the SN74AHC14 and GND pin of the ESP32.
• pin1 connected to Vcc of the SN74AHC14 and Vin pin of the ESP32.

Resistor

• pin1 connected to the D0 pin of the WS2815 LED Strip.
• pin2 connected to the 2A pin of the SN74AHC14.

ESP32 (30 pin)

• GND connected to GND of the SN74AHC14, GND of the INMP441, and Port 4 of the Splicing connector WAGO 221.
• Vin connected to Vcc of the SN74AHC14 and pin1 of the Ceramic Capacitor.
• D32 connected to 1Y of the SN74AHC14.
• D35 not connected to any other components in the provided net list.
• D23 connected to the SD pin of the INMP441.
• 3V3 connected to the VDD pin of the INMP441.

INMP441 Microphone Module

• GND connected to 6Y of the SN74AHC14, Port 4 of the Splicing connector WAGO 221, and GND pin of the ESP32.
• VDD connected to the 3V3 pin of the ESP32.
• SD connected to the D23 pin of the ESP32.

WS2815 LED Strip

• GND connected to Port 3 of the Splicing connector WAGO 221.
• B0 connected to Port 5 of the Splicing connector WAGO 221.
• D0 connected to pin1 of the Resistor.
• +12V connected to the output of the 5A fuse.

5A Fuse

• input connected to the + of the 12V power supply.
• output connected to the +12V of the WS2815 LED Strip.

Splicing Connector WAGO 221

• Port 2 connected to the - of the 12V power supply.
• Port 3 connected to the GND of the WS2815 LED Strip.
• Port 4 connected to the 6Y of the SN74AHC14, GND of the INMP441, and GND pin of the ESP32.
• Port 5 connected to the B0 of the WS2815 LED Strip.

Documented Code

SN74AHC14 Hex Inverter

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

}

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

}

Note: The provided code for the SN74AHC14 is a template and does not contain any functional code specific to the SN74AHC14, as it is not a programmable device.

ESP32 (30 pin)

No code provided for the ESP32 microcontroller. It is assumed that the user will write the necessary code to control the LED strip and process the microphone input.