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Smart ambient climate station
Fodor Mihnea-Stefan 331CA
Introduction
The smart ambient station automatically monitors temperature and adjusts a cooling fan's speed based on predefined thermal thresholds. It also displays the current real-time clock and allows full manual control via an infrared remote.
The purpose of the project is to maintain a comfortable local climate through automated cooling, while providing visual feedback and auditory alerts. It includes a critical safety mechanism that immediately halts all operations if the device is tilted or knocked over.
The starting concept was a standard thermostat, which evolved into a robust embedded system featuring a state machine, hardware-level safety interrupts and custom communication protocol implementations without relying on heavy third-party Arduino libraries.
For the user it serves as a practical desktop cooling and timekeeping gadget. It offers a highly affordable alternative to commercial cooling devices, while providing the flexibility of full manual control to suit personal comfort.
General Description
The ATmega328P runs a continuous state machine. In Auto Mode, it reads the ADC, calculates the temperature using the Steinhart-Hart equation and adjusts the PWM output to the fan. In Manual Mode, the IR receiver triggers an interrupt that decodes the NEC signal, allowing the user to override the fan speed, toggle RGB disco mode or trigger alarm. The Tilt Sensor has the highest priority: if triggered, it overrides all states, cuts power to the fan, and displays an error (—-) on the clock display.
Hardware Design
Bill of materials:
- ATmega328P
- 10k NTC thermistor
- DS3231 mini RTC module
- TM1637 4-digit display
- VS1838B infrared receiver & IR remote
- SW-520D tilt sensor
- sunon maglev 5V DC fan
- buzzer
- RGB LED
- NPN transistor 2N2222
- resistors
- wires
Software Design
- mediu de dezvoltare (if any) (e.g. AVR Studio, CodeVisionAVR)
- librării şi surse 3rd-party (e.g. Procyon AVRlib)
- algoritmi şi structuri pe care plănuiţi să le implementaţi
- (etapa 3) surse şi funcţii implementate
Rezultate Obţinute
Concluzii
Download
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Jurnal
Bibliografie/Resurse
