8-MD-06INKM clock (VFD)

Project Introduction Using the VFD module purchased on Taobao, I drew a CH552T microcontroller + DS3231MZ control board. I have been waiting for a long time and finally completed it. The purchase address of the keilv4 project, VFD module and some components is provided in the attachment as a reference. Video link for the demonstration at Station B. Program download and installation instructions. 1. After welding the control board, first check whether there is a short circuit. No. Short circuit and plug it into the computer to download the program. 2. Press and hold the SW6 button and insert it into the computer. The microcontroller will be recognized. CH552T does not require SW6 when downloading the program for the first time (program download reference). 3. The four circular openings of the VFD module and the control board are all M2 specifications. 4. When the VFD module and the control board are connected using 2.54 pin and female headers, the distance between the two boards is about 10mm and can be fixed with M2 copper pillars. Function description of 4 buttons Button: 4: Enter the setting selection interface. Press again to enter the setting selection interface to enter the corresponding function setting. Press button 1 when in the setting selection interface to exit the setting selection interface. Confirm the setting content Button 3: Select settings/+ Button 2: Date display/Select settings/- Button 1: Enter the countdown interface, press it again to start the countdown. Press button 4 on the countdown interface to set the countdown time. After confirming the setting, the countdown will start and the time display will continue. Switch the setting position when setting. The reminder animation for the end of the countdown needs to be pressed by button 1 to exit the night off display state. Press button 1 and it will be displayed. 5 seconds time update record 2022-03-26: Added 3.3V LDO to provide 3.3V for the microcontroller and DS3231MZ2022-07-25: I neglected that the maximum main frequency of CH552T can only be 16M under 3.3V, and the program modified the 24M main frequency The general process of the program for 12M main frequency