Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with a 16x2 I2C LCD, a DS1302 RTC module, a 1-Channel Relay, and multiple pushbuttons. The circuit is powered by a 3xAAA Battery Pack with Switch and JST, USB power, or a 5V Adapter. The Arduino UNO controls the relay and reads inputs from the pushbuttons, while the LCD displays information and the RTC module keeps track of time.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

16x2 I2C LCD

• Description: A 16x2 character LCD display with I2C interface.
• Pins: GND, VCC, SDA, SCL

1-Channel Relay (5V 10A)

• Description: A relay module that can control high voltage devices.
• Pins: NC, signal, C, power, NO, ground

DS1302 RTC

• Description: A real-time clock module for keeping track of time.
• Pins: VCC, GND, CLK, DATA, RST

Pushbutton

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

3xAAA Battery Pack with Switch and JST

• Description: A battery pack that holds three AAA batteries and includes a switch.
• Pins: POS, NEG

USB power

• Description: A USB power source.
• Pins: +, -

5V Adapter

• Description: A 5V power adapter.
• Pins: AC In 1, AC In 2, 5V, GND

Wiring Details

Arduino UNO

• 5V connected to:

  • DS1302 RTC (VCC)
  • 16x2 I2C LCD (VCC)
  • Pushbutton (Pin 2)
  • 1-Channel Relay (signal)
  • Pushbutton (Pin 2)
  • Pushbutton (Pin 2)

• GND connected to:

  • DS1302 RTC (GND)
  • 16x2 I2C LCD (GND)
  • 1-Channel Relay (ground)

• A4 connected to:

  • 16x2 I2C LCD (SDA)

• A5 connected to:

  • 16x2 I2C LCD (SCL)

• D8 connected to:

  • DS1302 RTC (RST)

• D7 connected to:

  • DS1302 RTC (DATA)

• D6 connected to:

  • DS1302 RTC (CLK)

• D5 connected to:

  • 1-Channel Relay (power)

• D4 connected to:

  • Pushbutton (Pin 3)

• D3 connected to:

  • Pushbutton (Pin 3)

• D2 connected to:

  • Pushbutton (Pin 3)

3xAAA Battery Pack with Switch and JST

• POS connected to:

  • USB power (+)
  • 5V Adapter (5V)

• NEG connected to:

  • USB power (-)
  • 5V Adapter (GND)

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the Arduino UNO.