Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a solar charger power bank, capacitive proximity sensors, a DHT22 temperature and humidity sensor, an ESP32 Wroom Dev Kit, and a passive buzzer. The circuit is designed to utilize solar power, detect proximity, measure environmental conditions, and produce sound signals.

Component List

1. Solar Charger Power Bank

   • Description: Provides power to the circuit.
   • Pins: +, -

2. LJC18A3-B-Z/BY Capacitive Proximity Sensor

   • Description: Detects the presence of nearby objects without physical contact.
   • Pins: VO (BLU), VI (BRN), SIG (BLK)

3. LJC18A3-B-Z/BY Capacitive Proximity Sensor

   • Description: Detects the presence of nearby objects without physical contact.
   • Pins: VO (BLU), VI (BRN), SIG (BLK)

4. DHT22

   • Description: Measures temperature and humidity.
   • Pins: VCC, OUT, GND

5. ESP 32 Wroom Dev Kit

   • Description: Microcontroller for processing and communication.
   • Pins: 3V3, EN, VP, VN, GPIO 34, GPIO 35, GPIO 32, GPIO 33, GPIO 25, GPIO 26, GPIO 27, GPIO 14, GND, GPIO 13, SD2, SD3, CMD, V5, GPIO 23, GPIO 22, TXD, RXD, GPIO 21, GPIO 19, GPIO 18, GPIO 5, GPIO 17, GPIO 16, GPIO 4, GPIO 0, GPIO 2, GPIO 15, SD1, SD0, CLK

6. Passive Buzzer

   • Description: Produces sound signals.
   • Pins: S output signal, +VCC, GND

Wiring Details

Solar Charger Power Bank

• Pin + is connected to:

  • VI (BRN) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • V5 of ESP 32 Wroom Dev Kit
  • VI (BRN) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • VCC of DHT22

• Pin - is connected to:

  • VO (BLU) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • GND of ESP 32 Wroom Dev Kit
  • VO (BLU) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • GND of Passive Buzzer

LJC18A3-B-Z/BY Capacitive Proximity Sensor

• Pin VO (BLU) is connected to:

  • • of Solar Charger Power Bank
  • GND of ESP 32 Wroom Dev Kit
  • • of Solar Charger Power Bank
  • GND of Passive Buzzer

• Pin VI (BRN) is connected to:

  • • of Solar Charger Power Bank
  • V5 of ESP 32 Wroom Dev Kit
  • • of Solar Charger Power Bank
  • VCC of DHT22

• Pin SIG (BLK) is connected to:

  • GPIO 14 of ESP 32 Wroom Dev Kit

LJC18A3-B-Z/BY Capacitive Proximity Sensor

• Pin VO (BLU) is connected to:

  • • of Solar Charger Power Bank
  • GND of ESP 32 Wroom Dev Kit
  • • of Solar Charger Power Bank
  • GND of Passive Buzzer

• Pin VI (BRN) is connected to:

  • • of Solar Charger Power Bank
  • V5 of ESP 32 Wroom Dev Kit
  • • of Solar Charger Power Bank
  • VCC of DHT22

• Pin SIG (BLK) is connected to:

  • GPIO 14 of ESP 32 Wroom Dev Kit

DHT22

• Pin VCC is connected to:

  • • of Solar Charger Power Bank

• Pin OUT is connected to:

  • GPIO 13 of ESP 32 Wroom Dev Kit

• Pin GND is connected to:

  • GND of ESP 32 Wroom Dev Kit

ESP 32 Wroom Dev Kit

• Pin GND is connected to:

  • • of Solar Charger Power Bank
  • VO (BLU) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • GND of Passive Buzzer
  • GND of DHT22

• Pin V5 is connected to:

  • • of Solar Charger Power Bank
  • VI (BRN) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • VCC of DHT22

• Pin GPIO 14 is connected to:

  • SIG (BLK) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • SIG (BLK) of LJC18A3-B-Z/BY Capacitive Proximity Sensor

• Pin GPIO 13 is connected to:

  • OUT of DHT22

• Pin 3V3 is connected to:

  • +VCC of Passive Buzzer

• Pin GPIO 15 is connected to:

  • S output signal of Passive Buzzer

Passive Buzzer

• Pin GND is connected to:

  • • of Solar Charger Power Bank
  • VO (BLU) of LJC18A3-B-Z/BY Capacitive Proximity Sensor
  • GND of ESP 32 Wroom Dev Kit

• Pin +VCC is connected to:

  • 3V3 of ESP 32 Wroom Dev Kit

• Pin S output signal is connected to:

  • GPIO 15 of ESP 32 Wroom Dev Kit

Code

No code is provided for the microcontrollers in this circuit.