Circuit Documentation

Summary

This circuit involves an Arduino Nano microcontroller interfacing with various components including an LCD display, pushbuttons, a potentiometer, a voltage sensor, a fan, and a TP4056 battery charger module connected to 18650 Li-Ion batteries. The circuit is designed to read inputs from the pushbuttons and potentiometer, display information on the LCD, and control the fan. The TP4056 module is used to charge the 18650 Li-Ion batteries.

Component List

1. Arduino Nano

   • Description: A small, complete, and breadboard-friendly board based on the ATmega328P.
   • Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

2. 18650 Li-Ion Battery

   • Description: A rechargeable lithium-ion battery.
   • Pins: Positive, Negative

3. TP4056

   • Description: A linear battery charger module for single-cell lithium-ion batteries.
   • Pins: OUT-, B-, B+, OUT+, IN-, IN+

4. USB Female

   • Description: A USB female connector for power input.
   • Pins: VCC, GND, -D, +D

5. Fan

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

6. LCD Display (16 pin)

   • Description: A 16x2 character LCD display.
   • Pins: VSS, VDD, VO, RS, R_W, E, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7, A, K

7. Voltage Sensor

   • Description: A sensor to measure voltage levels.
   • Pins: Ground, Phase, Vcc, Out, Gnd

8. Pushbutton

   • Description: A simple pushbutton switch.
   • Pins: Pin 2, Pin 1, Pin 3, Pin 4

9. Potentiometer

   • Description: A variable resistor used to adjust voltage levels.
   • Pins: GND, Output, VCC

Wiring Details

Arduino Nano

• GND is connected to:

  • VSS of LCD Display
  • R_W of LCD Display
  • Gnd of Voltage Sensor
  • GND of Potentiometer
  • Pin 2 of Pushbutton 1
  • Pin 2 of Pushbutton 2
  • GND of Fan
  • K of LCD Display
  • OUT- of TP4056
  • Negative of 18650 Li-Ion Battery

• D2 is connected to DB7 of LCD Display

• D3 is connected to DB6 of LCD Display

• D4 is connected to DB5 of LCD Display

• D5 is connected to DB4 of LCD Display

• D6 is connected to E of LCD Display

• D7 is connected to RS of LCD Display

• D8 is connected to Pin 1 of Pushbutton 2

• D9 is connected to Pin 1 of Pushbutton 1

• VIN is connected to:

  • 5V of Fan
  • OUT+ of TP4056
  • Positive of 18650 Li-Ion Battery

• A0 is connected to:

  • Output of Potentiometer
  • Out of Voltage Sensor

• 5V is connected to:

  • VCC of Potentiometer
  • VDD of LCD Display
  • A of LCD Display
  • Vcc of Voltage Sensor

TP4056

• B+ is connected to Positive of 18650 Li-Ion Battery

• B- is connected to Negative of 18650 Li-Ion Battery

• IN- is connected to GND of USB Female

• IN+ is connected to VCC of USB Female

USB Female

• GND is connected to IN- of TP4056

• VCC is connected to IN+ of TP4056

Fan

• GND is connected to GND of Arduino Nano

• 5V is connected to VIN of Arduino Nano

LCD Display (16 pin)

• VSS is connected to GND of Arduino Nano

• VDD is connected to 5V of Arduino Nano

• R_W is connected to GND of Arduino Nano

• E is connected to D6 of Arduino Nano

• RS is connected to D7 of Arduino Nano

• DB4 is connected to D5 of Arduino Nano

• DB5 is connected to D4 of Arduino Nano

• DB6 is connected to D3 of Arduino Nano

• DB7 is connected to D2 of Arduino Nano

• A is connected to 5V of Arduino Nano

• K is connected to GND of Arduino Nano

Voltage Sensor

• Gnd is connected to GND of Arduino Nano

• Vcc is connected to 5V of Arduino Nano

• Out is connected to A0 of Arduino Nano

Pushbutton 1

• Pin 1 is connected to D9 of Arduino Nano

• Pin 2 is connected to GND of Arduino Nano

Pushbutton 2

• Pin 1 is connected to D8 of Arduino Nano

• Pin 2 is connected to GND of Arduino Nano

Potentiometer

• GND is connected to GND of Arduino Nano

• Output is connected to A0 of Arduino Nano

• VCC is connected to 5V of Arduino Nano

Code Documentation

Arduino Nano Code

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

}

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

}

This code is a basic template for the Arduino Nano. The setup() function is where you initialize your components and settings, and the loop() function is where the main logic of your program runs repeatedly. Currently, the code does not perform any specific actions and serves as a starting point for further development.