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on-table-clock-temp-678af7-en.md

Do You Know the Time & Your Room Temperature?

This is a simple project that let you check out time, date and your room temperature by only a hand waving on TCRT5000 (IR sensor). This feature is not big size so you can place it on your bedside table, and check out time and weather temperature before sleep, after waking up, or whenever else.

System's Work

Part I: Waking up system by only a handshaking

My core system (hear Atmega328, core of Arduino Uno) is always in sleep mode (to use low power) and when someone shakes his hand Tcrt5000 (IR sensor) make an interrupt to system and wake it up, so system's work starts.

System Is Sleep Till a Hand Shaking

Part II: Measuring time & temperature

After waking up system goes through measuring temp by using LM35, then check out time by using the RTC module and after that show them on LCD.

Part III: Show on LCD and go to sleep

After all with an LCM1602 (a module that connects pin to pin to your LCD then gets an I2C output) information will be sent to LCD.

Hint: I connected pin 16 and 15 of LCD to pin 6 and 7 of Arduino so I can turn LCD's back light of and on when ever I want, also I used PWM of pin 6 to turning on LCD's back light smoothly.

Showing on LCD, Then Going to Sleep

EXPANDED TECHNICAL DETAILS

Desktop Chronometry & IAQ Hub

A professional-grade desktop accessory that combines accurate timekeeping with indoor air quality (IAQ) monitoring.

  • Precision RTC Synchronization: Uses a DS3231 I2C RTC to maintain time accuracy within ±2ppm. The Arduino fetches this data every 1 second and renders a clean "Digital Clock" layout on a high-contrast display.
  • Altium-Engineered Circuitry: The internal PCB was designed in Altium Designer, ensuring a compact, noise-free layout that fits perfectly into its custom-fabricated enclosure.

Design

  • Fritzing Visualization Proofing: The project's initial wiring and component placement were verified in Fritzing, providing a clear blueprint for assembly and future hardware modifications.

ข้อมูล Frontmatter ดั้งเดิม 

title: "On Table Clock & Temp"
description: "Checking out time and room's temperature by one hand shake."
author: "taha_vs"
category: "Sensors & Environment"
tags:
  - "smartwatch"
  - "embedded"
  - "home automation"
views: 6861
likes: 6
price: 1499
difficulty: "Intermediate"
components:
  - "1x Resistor 10k ohm"
  - "1x lcd 20*4"
  - "1x Resistor 47.5k ohm"
  - "1x tcrt 5000"
  - "1x Resistor 1k ohm"
  - "1x Arduino UNO"
  - "1x tiny rtc i2c module"
  - "1x Soldering iron (generic)"
  - "1x lcm 1602"
  - "1x lm 35"
tools: []
apps:
  - "1x Arduino IDE"
  - "1x Fritzing"
  - "1x DXP Altium Designer"
downloadableFiles:
  - "https://projects.arduinocontent.cc/8fd8dec5-8407-4c12-b0b0-96f8b96bda6d.ino"
  - "https://projects.arduinocontent.cc/8fd8dec5-8407-4c12-b0b0-96f8b96bda6d.ino"
documentationLinks: []
passwordHash: "5b81fe128b2f6c98547f8522611d65601d477810b6f5e5150fd82b6ed039b1ed"
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seoDescription: "Build an On Table Clock & Temp. Check Time and Temperature with a simple Hand Shake gesture. Smart Arduino project for your desk."
videoLinks:
  - "https://www.youtube.com/embed/yO_mP0QEPro"
heroImage: "https://cdn.jsdelivr.net/gh/bigboxthailand/arduino-assets@main/images/projects/on-table-clock-temp-678af7_cover.jpg"
lang: "en"