#The 8th Lichuang Electronic Competition#Desktop Voice Weather Clock

### 1. Function Introduction
###### The design functions are as follows:
###### Function 1: The digital tube displays time, temperature, etc., and uses the SHT30 temperature and humidity sensor to collect ambient temperature and humidity.
###### Function 2: The voice assistant broadcasts the ambient temperature and humidity or turns on the stopwatch function.
###### Function 3: The stopwatch function can be turned on by the voice assistant.
###### Function 4: The alarm function can be set through the four-digit button.

### 2. Overall Design Scheme
###### This design uses the Renesas R7FA2E1A72DF chip as the MCU of this scheme. The temperature and humidity detection uses SHT30 to collect ambient temperature and humidity. Use a 0.56-inch large-screen digital tube to display information. STU-30 voice module to broadcast.

### 3. Hardware Introduction
###### How is such a feature-rich desktop voice weather clock ornament designed? Next, the functional composition of each circuit module will be introduced one by one.

##### 3.1 Power input
###### The power supply is an important part of the whole circuit. In terms of power supply selection, this project chooses to use Typec-c power supply, and an AMS1117-3.3 LDO linear regulator IC is used to power the microcontroller and peripheral devices, while the voice broadcast is directly powered by Typec-c 5V.
![2.png]
##### 3.2 Environmental acquisition
###### The SHT30 DFN-8 small package chip is used to collect environmental temperature and humidity. The chip uses the IIC communication protocol to read.
![3.png]
##### 3.3 Display
###### The display uses a 0.56-inch common cathode digital tube large screen digital tube to display time and environmental temperature and humidity information, etc.
![4.png]
##### 3.4 Voice function
###### The SU-03T voice module is used for voice control to broadcast environmental temperature and humidity or start the stopwatch function.
![5.png]
##### 3.4 Others
###### There are four buttons that realize extended functions and switching functions by combining buttons
![6.png]
### 4. Physical display
###### The video is published on the Bilibili video platform.
###### Link: [https://www.bilibili.com/video/BV1vM4y1s7gZ/](https://www.bilibili.com/video/BV1vM4y1s7gZ/)
###### BV No.: BV1vM4y1s7gZ