Circuit Documentation

Summary

This document provides a detailed overview of a circuit design that includes various sensors, a microcontroller, a display, and other components. The circuit is designed to interface with an ESP32 microcontroller, which collects data from sensors, drives a display, and controls other peripherals.

Component List

1. ESP32 38 PINS

   • Description: A versatile microcontroller with Wi-Fi and Bluetooth capabilities.
   • Pins: GND, 23, 22/SCL, 1, 2, 21/SDA, 19, 18, 5, 17/TX2, 16/RX2, 4, 0, 15, D1, D0, CLK, 3V3, EN, VP, VN, 34, 35, 32, 33, 25, 26, 27, 14, 12, 13, D2, D3, 11, 5V/VIN

2. DHT22

   • Description: A digital temperature and humidity sensor.
   • Pins: +, Out, -

3. Adafruit SGP30

   • Description: A gas sensor for measuring air quality.
   • Pins: VCC, 3.3V, GND, SCL, SDA

4. HX711 Weighing Sensor Module

   • Description: A precision 24-bit analog-to-digital converter (ADC) designed for weigh scales.
   • Pins: B-, B+, A-, A+, E-, E+, VCC, CK/TX, DO/RX, GND

5. DS18B20

   • Description: A digital thermometer.
   • Pins: OUTPUT, VCC 3.3V-5V DC, GND

6. Buzzer

   • Description: An audio signaling device.
   • Pins: PIN, GND

7. TB660 Stepper Motor Driver

   • Description: A driver for controlling stepper motors.
   • Pins: ENA - (ENA), ENA+ (+5V), DIR - (DIR), DIR+ (+5V), PUL - (PUL), VCC, GND, A+, A-, B+, B-, PUL+ (+5V)

8. Adafruit TFT 1.8 inch 160x128 w microSD

   • Description: A small TFT display with microSD card support.
   • Pins: LITE, MISO, SCLK, MOSI, TFTCS, CARDCS, TFTDC, RESET, +5V, GND

9. Fan

   • Description: A cooling fan.
   • Pins: GND, 5V

10. Adafruit MiCS-5524 Gas Sensor

    • Description: A gas sensor for detecting various gases.
    • Pins: 5.0V, GND, AOUT, ENABLE

11. LM2596

    • Description: A DC-DC buck converter.
    • Pins: IN, OUT

12. MW LRS-350-24

    • Description: A 24V power supply.
    • Pins: +24V Output, -24V Output, GND, N, L

13. NEMA 23

    • Description: A stepper motor.
    • Pins: B2 Red, B1 Blue, A2 Black, A1 Green

Wiring Details

ESP32 38 PINS

• GND: Connected to GND of HX711 Weighing Sensor Module, Adafruit TFT 1.8 inch 160x128 w microSD, Adafruit SGP30, Fan, Adafruit MiCS-5524 Gas Sensor, DS18B20, Buzzer, DHT22, LM2596
• 23: Connected to MOSI of Adafruit TFT 1.8 inch 160x128 w microSD
• 22/SCL: Connected to SCL of Adafruit SGP30
• 21/SDA: Connected to SDA of Adafruit SGP30
• 19: Connected to MISO of Adafruit TFT 1.8 inch 160x128 w microSD
• 18: Connected to SCLK of Adafruit TFT 1.8 inch 160x128 w microSD
• 5: Connected to TFTCS of Adafruit TFT 1.8 inch 160x128 w microSD
• 17/TX2: Connected to CK/TX of HX711 Weighing Sensor Module
• 16/RX2: Connected to DO/RX of HX711 Weighing Sensor Module
• 4: Connected to CARDCS of Adafruit TFT 1.8 inch 160x128 w microSD
• 0: Connected to RESET of Adafruit TFT 1.8 inch 160x128 w microSD
• 2: Connected to TFTDC of Adafruit TFT 1.8 inch 160x128 w microSD
• 15: Connected to OUTPUT of DS18B20
• 3V3: Connected to VCC of HX711 Weighing Sensor Module, VCC 3.3V-5V DC of DS18B20, LITE of Adafruit TFT 1.8 inch 160x128 w microSD, ENA+ (+5V) of TB660 Stepper Motor Driver, + of DHT22, VCC of Adafruit SGP30
• 34: Connected to AOUT of Adafruit MiCS-5524 Gas Sensor
• 25: Connected to ENABLE of Adafruit MiCS-5524 Gas Sensor
• 14: Connected to Out of DHT22
• 13: Connected to PIN of Buzzer
• 5V/VIN: Connected to 5V of Fan, 5.0V of Adafruit MiCS-5524 Gas Sensor, OUT of LM2596

DHT22

• +: Connected to 3V3 of ESP32 38 PINS
• Out: Connected to 14 of ESP32 38 PINS
• -: Connected to GND of ESP32 38 PINS

Adafruit SGP30

• VCC: Connected to 3V3 of ESP32 38 PINS
• GND: Connected to GND of ESP32 38 PINS
• SCL: Connected to 22/SCL of ESP32 38 PINS
• SDA: Connected to 21/SDA of ESP32 38 PINS

HX711 Weighing Sensor Module

• GND: Connected to GND of ESP32 38 PINS
• CK/TX: Connected to 17/TX2 of ESP32 38 PINS
• DO/RX: Connected to 16/RX2 of ESP32 38 PINS
• VCC: Connected to 3V3 of ESP32 38 PINS

DS18B20

• OUTPUT: Connected to 15 of ESP32 38 PINS
• VCC 3.3V-5V DC: Connected to 3V3 of ESP32 38 PINS
• GND: Connected to GND of ESP32 38 PINS

Buzzer

• PIN: Connected to 13 of ESP32 38 PINS
• GND: Connected to GND of ESP32 38 PINS

TB660 Stepper Motor Driver

• ENA+ (+5V): Connected to 3V3 of ESP32 38 PINS
• VCC: Connected to +24V Output of MW LRS-350-24
• GND: Connected to -24V Output of MW LRS-350-24
• A+: Connected to A1 Green of NEMA 23
• A-: Connected to A2 Black of NEMA 23
• B+: Connected to B1 Blue of NEMA 23
• B-: Connected to B2 Red of NEMA 23

Adafruit TFT 1.8 inch 160x128 w microSD

• GND: Connected to GND of ESP32 38 PINS
• MOSI: Connected to 23 of ESP32 38 PINS
• MISO: Connected to 19 of ESP32 38 PINS
• SCLK: Connected to 18 of ESP32 38 PINS
• TFTCS: Connected to 5 of ESP32 38 PINS
• CARDCS: Connected to 4 of ESP32 38 PINS
• TFTDC: Connected to 2 of ESP32 38 PINS
• RESET: Connected to 0 of ESP32 38 PINS
• LITE: Connected to 3V3 of ESP32 38 PINS

Fan

• GND: Connected to GND of ESP32 38 PINS
• 5V: Connected to 5V/VIN of ESP32 38 PINS

Adafruit MiCS-5524 Gas Sensor

• 5.0V: Connected to 5V/VIN of ESP