Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an OLED display, a TP4056 battery charger, a LiPoly battery, an RTC module, a voltage regulator, a potentiometer, a pushbutton, an aluminum sheet, and an ESP32 microcontroller. The circuit is designed to interface these components to achieve a specific functionality, which is controlled by the ESP32 microcontroller.

Component List

0.96" OLED

• Description: OLED display module
• Pins: GND, VDD, SCK, SDA

TP4056

• Description: Lithium battery charger module
• Pins: OUT-, B-, B+, OUT+, IN-, IN+

LiPoly Battery (1300mAh)

• Description: Lithium Polymer battery
• Pins: positive, negative

RTC DS3231

• Description: Real-Time Clock module
• Pins: 32K, SQW, SCL, SDA, VCC, GND

LM2596

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

ams1117 3.3

• Description: 3.3V voltage regulator
• Pins: VIN, OUT, GND

Rotary Potentiometer

• Description: Variable resistor
• Pins: leg1, wiper, leg2
• Properties: Resistance: 10000 Ohms

Red Pushbutton

• Description: Pushbutton switch
• Pins: Pin 2, Pin 1, Pin 3, Pin 4

Aluminum Sheet

• Description: Conductive sheet
• Pins: -, +

ESP32 Mini

• Description: Microcontroller module
• Pins: GND, GPIO27, GPIO25, GPIO32, TDI, GPIO4, GPIO0, GPIO2, SD1, CLK, RXD, TXD, GPIO22, GPIO21, GPIO17, GPIO16, VCC, TD0, SD0, RST, SVP, GPIO26, GPIO18, GPIO19, GPIO23, GPIO5, 3.3V, TCK, SD3, NC, SVN, GPIO35, GPIO33, GPIO34, TMS, SD2

Wiring Details

0.96" OLED

• GND is connected to:

  • GND of ESP32 Mini
  • GND of RTC DS3231
  • GND of Red Pushbutton

• VDD is connected to:

  • 3.3V of ESP32 Mini
  • VCC of RTC DS3231

• SCK is connected to:

  • GPIO25 of ESP32 Mini
  • GPIO22 of ESP32 Mini
  • SCL of RTC DS3231
  • • of Aluminum Sheet

• SDA is connected to:

  • GPIO32 of ESP32 Mini
  • GPIO21 of ESP32 Mini
  • SDA of RTC DS3231

TP4056

• OUT- is connected to:

  • GND of ams1117 3.3
  • GND of ESP32 Mini
  • Pin 1 of Red Pushbutton

• B- is connected to:

  • negative of LiPoly Battery (1300mAh)

• B+ is connected to:

  • positive of LiPoly Battery (1300mAh)

• OUT+ is connected to:

  • IN of LM2596

LiPoly Battery (1300mAh)

• positive is connected to:

  • B+ of TP4056

• negative is connected to:

  • B- of TP4056

RTC DS3231

• GND is connected to:

  • GND of ESP32 Mini
  • GND of 0.96" OLED
  • GND of Red Pushbutton

• VCC is connected to:

  • 3.3V of ESP32 Mini
  • VDD of 0.96" OLED

• SCL is connected to:

  • GPIO25 of ESP32 Mini
  • GPIO22 of ESP32 Mini
  • SCK of 0.96" OLED
  • • of Aluminum Sheet

• SDA is connected to:

  • GPIO32 of ESP32 Mini
  • GPIO21 of ESP32 Mini
  • SDA of 0.96" OLED

LM2596

• IN is connected to:

  • OUT+ of TP4056

• OUT is connected to:

  • VIN of ams1117 3.3

ams1117 3.3

• VIN is connected to:

  • OUT of LM2596

• OUT is connected to:

  • GPIO2 of ESP32 Mini
  • VCC of ESP32 Mini

• GND is connected to:

  • OUT- of TP4056
  • GND of ESP32 Mini
  • Pin 1 of Red Pushbutton

Rotary Potentiometer

• leg1 is connected to:

  • 3.3V of ESP32 Mini
  • VDD of 0.96" OLED
  • VCC of RTC DS3231

• wiper is connected to:

  • GPIO23 of ESP32 Mini
  • GPIO34 of ESP32 Mini

• leg2 is connected to:

  • GND of ESP32 Mini
  • TXD of ESP32 Mini

Red Pushbutton

• Pin 2 is connected to:

  • RST of ESP32 Mini
  • GND of ESP32 Mini
  • GND of 0.96" OLED
  • GND of RTC DS3231

• Pin 1 is connected to:

  • GND of ams1117 3.3
  • OUT- of TP4056

Aluminum Sheet

• + is connected to:
  • GPIO27 of ESP32 Mini
  • RXD of ESP32 Mini
  • GPIO25 of ESP32 Mini
  • GPIO22 of ESP32 Mini
  • SCK of 0.96" OLED
  • SCL of RTC DS3231

Documented Code

ESP32 Mini Code

sketch.ino

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

}

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

}

documentation.txt