Circuit Documentation

Summary of the Circuit

This circuit consists of an ESP8266 NodeMCU microcontroller unit (MCU) interfaced with an LM393 comparator module. The ESP8266 NodeMCU is a Wi-Fi capable microcontroller with a variety of digital and analog pins, which can be programmed to interact with various sensors, modules, and actuators. The LM393 module is a dual differential comparator that outputs a digital signal based on the comparison of two analog input voltages.

The ESP8266 NodeMCU is powered by a 3.3V supply, and it shares a common ground with the LM393 comparator. The D3 pin of the ESP8266 NodeMCU is connected to the D0 output of the LM393 comparator, allowing the microcontroller to read the digital output of the comparator.

Component List

ESP8266 NodeMCU

• Description: A Wi-Fi capable microcontroller with multiple digital and analog pins.
• Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

LM393 Comparator Module

• Description: A dual differential comparator module that outputs a digital signal.
• Pins: VCC, GND, D0, A0

Wiring Details

ESP8266 NodeMCU

• 3V3: Connected to the VCC of the LM393 to power the module.
• GND: Common ground shared with the LM393.
• D3: Receives the digital output signal from the D0 pin of the LM393.

LM393 Comparator Module

• VCC: Connected to the 3V3 pin of the ESP8266 NodeMCU for power.
• GND: Common ground shared with the ESP8266 NodeMCU.
• D0: Digital output connected to the D3 pin of the ESP8266 NodeMCU.

Documented Code

There is no code provided for the microcontroller in this circuit. The ESP8266 NodeMCU would typically be programmed to read the digital output from the LM393 comparator and perform actions based on the comparator's output. Since no code is available, it is recommended to develop firmware that initializes the D3 pin as an input and periodically reads its state to detect changes from the LM393 comparator.