#The8thLiChuangElectronicContest#ElectronicClock_2023SummerTrainingCamp

 
* 1. Introduction to project functions
I participated in the LiChuang training camp and heard that there are so many things that can tell time when making a clock, such as computers, mobile phones, and watches. If I make another one, I have to highlight three words: accurate, accurate, and accurate!
1. This project uses satellite timing, PPS synchronization second pulse synchronization time, and an external crystal oscillator drives the RTC when there is no satellite signal. The GPS chip uses Zhongkewei ATGM332D-5N31.
2. Renesas R7FA2E1A72DFL is used as the main control chip of the electronic clock. 3. A four-digit 0.8-inch white common anode digital tube is used to display the time. 4. The ambient temperature is collected through the AHT25 temperature and humidity sensor, with a humidity error of ±2% and a temperature error of ±0.3. 5. There are 4 physical function buttons, as well as a reset button, a mode switch button, a serial port circuit, and a SWD download circuit, which are convenient for downloading and debugging. 6. A passive buzzer is used as a button prompt sound. 7. The battery is charged through TP4056
. 8. LDO is used to power the GPS chip, and the output of LDO can be controlled by enabling to achieve the purpose of power saving.
**2023.8.5 New 1. The problem of the button sound being too small has been fixed; 2. The hourly sound prompt has been added (there is a sound from 8 am to 9 pm); 3. The sound effect of turning on and off the satellite time service has been added; 4. Voltage detection has been added, and there will be a sound prompt once every minute when the battery voltage is lower than 2.8V. *2. The project attributes are made public for the first time, and the development is expanded based on the project of the training camp. Note: Please indicate whether the project is the first time to be made public; whether the project is original; whether the project has won awards in other competitions, if so, please describe the details of the awards; whether the project has participated in the defense at school. * 3. Open Source Agreement Public Domain *4. Hardware Circuit board: 3D shell: Note: It is recommended to use Jiali Chuang EDA. If you choose other EDA tools, please upload the schematic diagram in PDF format, the PCB drawing in PDF format, and the PCB file in Gerber format in the attachment. Here you can explain in detail the implementation principle and mechanism of your project, precautions, debugging methods, testing methods, etc. It is recommended to introduce your ideas to others in the form of pictures and texts. *5. Software The software is developed using Renesas Flexible Software Package (FSP) v4.4.0 development software. For digital tube display, RTC, temperature and humidity, please refer to the attached document. The timing relationship between the GPS PPS pulse and the data output by the GPS serial port is shown in the figure below, yellow is PPS, and green is the serial port message. For specific implementation, please refer to the source code (digital_clock.zip) in the attachment. No need to decompress, just import it with e2studio. *6. BOM list Note: BOM list involved in the project. Please upload a screenshot of the BOM in this location. Please upload the list details in PDF format to the attachment. It is recommended to include model, brand, name, package, procurement channel, purpose, etc. The specific content and format should be based on the clear expression of the project composition. *7. Competition LOGO verification * 8. Demonstrate your project and record it into a video and upload it [Desktop electronic clock with satellite timing]