In the above image, you can find the circuit diagram ... to interface the DHT11 temperature and humidity sensor with the STM32F103C8 (Blue Pill) board using the Arduino IDE. It displays real-time ...

The Intel 8051 series of 8-bit microcontrollers is long-discontinued by its original manufacturer, but lives on as a core ...

The complexity here is that we need to fix the circuit in a mobile and remote place—the helmet. So, simplifying the circuit is most important to make it compact and reliable. The circuit diagram is ...

and then use a button on the thermostat to toggle the LCD between different 'views' (temp, humidity, CO, smoke, etc). Time ran out, however. For the A/C unit, also implemented using an 8051 ...