Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32C3 microcontroller, various sensors, a fan, a transistor, a battery, a boost converter, a solar panel, and a charging module. The circuit is designed to monitor environmental conditions and control a fan based on sensor inputs. The power for the circuit is managed through a combination of a solar panel, a battery, and a boost converter.

Component List

1. ESP32C3 Supermini

   • Description: A microcontroller with multiple GPIO pins.
   • Pins: GPIO05, GPIO06, GPIO07, GPIO08, GPIO09, GPIO10, GPIO20, GPIO21, GPIO00, GPIO01, GPIO02, GPIO03, GPIO04, 3.3V, GND, +5V

2. BME/BMP280

   • Description: A sensor module for measuring temperature, humidity, and pressure.
   • Pins: GND, SCL, SDA, VIN

3. DHT 11

   • Description: A digital temperature and humidity sensor.
   • Pins: VCC, GND, DATA

4. NPN Transistor (CBE)

   • Description: A transistor used for switching applications.
   • Pins: collector, base, emitter

5. Fan

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

6. TP4056

   • Description: A lithium battery charging module.
   • Pins: OUT-, B-, B+, OUT+, IN-, IN+

7. 18650 in holder

   • Description: A holder for a 18650 lithium battery.
   • Pins: GND, VCC

8. Boost converter MT3608

   • Description: A boost converter to step up voltage.
   • Pins: OUTPUT +, OUTPUT -, INPUT +, INPUT -

9. Solar panel

   • Description: A solar panel for generating power.
   • Pins: +, -

Wiring Details

ESP32C3 Supermini

• GPIO08 connected to BME/BMP280 SDA
• GPIO09 connected to BME/BMP280 SCL
• GPIO02 connected to DHT 11 DATA
• GPIO03 connected to NPN Transistor (CBE) base
• GND connected to:
  • NPN Transistor (CBE) emitter
  • DHT 11 GND
  • boost converter MT3608 OUTPUT -
  • BME/BMP280 GND
• +5V connected to:
  • DHT 11 VCC
  • Fan 5V
  • boost converter MT3608 OUTPUT +
  • BME/BMP280 VIN

BME/BMP280

• SDA connected to ESP32C3 Supermini GPIO08
• SCL connected to ESP32C3 Supermini GPIO09
• GND connected to ESP32C3 Supermini GND
• VIN connected to ESP32C3 Supermini +5V

DHT 11

• VCC connected to ESP32C3 Supermini +5V
• GND connected to ESP32C3 Supermini GND
• DATA connected to ESP32C3 Supermini GPIO02

NPN Transistor (CBE)

• collector connected to Fan GND
• base connected to ESP32C3 Supermini GPIO03
• emitter connected to ESP32C3 Supermini GND

Fan

• GND connected to NPN Transistor (CBE) collector
• 5V connected to ESP32C3 Supermini +5V

TP4056

• OUT- connected to boost converter MT3608 INPUT -
• B- connected to 18650 in holder GND
• B+ connected to 18650 in holder VCC
• OUT+ connected to boost converter MT3608 INPUT +
• IN- connected to solar panel -
• IN+ connected to solar panel +

18650 in holder

• GND connected to TP4056 B-
• VCC connected to TP4056 B+

Boost converter MT3608

• OUTPUT + connected to ESP32C3 Supermini +5V
• OUTPUT - connected to ESP32C3 Supermini GND
• INPUT + connected to TP4056 OUT+
• INPUT - connected to TP4056 OUT-

Solar panel

• - connected to TP4056 IN-
• + connected to TP4056 IN+

Code

No code is provided for this circuit.