6. Design an automatic setback HVAC thermostat using the FPGA. Interface a temperature sensor to the FPGA. Some temperature sensors are available with digital outputs that would not require a separate analog-to-digital IC. Display the current time, temperature, heat, fan, and A/C status, and the temperature settings in the LCD. Use the pushbuttons to change the temperature settings and setback times. Use the LEDs to indicate the heat, A/C, and fan control outputs from the thermostat. You can heat the temperature sensor with your finger to cycle the thermostat and cool it with ice or an aerosol spray can of dust off cleaner.