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How To Make A Smart Thermostat?

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How To Make A Smart Thermostat?

Nowadays, people need a zero-degree separation from the temperature they want. A thermostat is a handy little device designed for such specific heating and cooling needs. They form a component of a HVAC (Heating, Venting and Air Conditioning) system to sense and maintain a system’s temperature to a desired setpoint by switching heating/cooling devices on and off.

If you are looking for such type of comfort or need to conserve energy, walk-through these reference designs that can assist you to build a fully-functional Digital Thermostat with enhanced features:-

  • Flexible Thermostat with Power-saving Features: Here is a power saving thermostat reference design with a high accuracy of 0.1 °C. The design has provision for driving small and large LCD panels using the same hardware to show the temperature, date, and time. A 2 x 28 (low-end) and 8 x 24 (high-end) LCD display allow different power consumptions. The high-end LCD display includes HVAC (Heating, Venting and Air conditioning) LED indicators and contrast control features as well. The design is built around a microcontroller MC9S08LL16 ideal for low-power LCD applications. Power consumption of as low as 1.5 µA is possible with a low power blinking mode in which an LCD blinks with a one second blink period without waking the controller. A 12-bit ADC on the MCU gives quite accurate temperature measurement using a thermistor. The heat/cool temperature is programmable. More on this Reference Design
  • Low-cost Wi-Fi Thermostat: Here is a low-cost thermostat design with integrated wireless connectivity to control the thermostat settings (heat/cool temperature) using a PC or smartphone. The thermostat design saves power with a low power Renesas RL78/L13 MCU and a low power Gainspan GS1011M Wi-Fi module. Mobile apps for iOS and Android mobiles allow users to set the time, view relative humidity and program temperature settings that can be applied to weekdays, weekends or selected days of the week. The design utilizes a low cost segment LCD display and RL78 MCU to create a low cost solution. More on this Reference Design
  • Battery-powered Thermostat with Remote Control: This is a battery-powered thermostat with remote control via a GUI. The design performs highly accurate temperature measurements by utilizing an ultra-low-power MSP430FR4133 FRAM-based MCU. The MCU features 1.8uA standby current to extend battery life. A large 3.4 inch LCD display shows temperature from 0°C ~ 35°C temperature with 0.1°C resolution. In addition, the design features capacitive touch buttons. Included in the design are hardware, firmware, GUI, demo files and user guide. More on this Reference Design
  • Thermostat with Touch and Wireless Connectivity: The reference design is a low-power thermostat with touch control and wireless connectivity. The design is battery-powered (with 2 AA batteries) with a 115 segment LCD display with backlit. The design has temperature, humidity and ambient sensors for measurements using a Atmel ATSAM4LC microcontroller. Six capacitive touch buttons, a buzzer and a USB port for firmware updating are also provided. An additional JTAG port allows for programming and debugging. A 2.4GHz RF transceiver from Atmel (AT86RF233) is provided for wireless connectivity. This reference design comes along with hardware design files (schematic, BOM, PCB Gerber) and software source code. More on this Reference Design
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