51 microcontroller clock

Highlights of the 51ClockK project description
: The software uses the state machine idea (although using the Switch statement is very stupid), and the hardware wiring I personally think is very beautiful (self-proclaimed)
Notes: 1. The circuit diagram and PCB files are all on the Lichuang open source platform 2. The BOM table is written by the author If you haven’t checked carefully, please refer to the components used in the PCB! 3. In the demonstration video, the TP5400 on the PCB was not soldered because it was burned out by me at the time. Haha, the actual production requires soldering, otherwise it cannot be charged. 4. As shown in the picture As shown in the figure, a black heat sink is installed on the TP5400 charging chip. Because the charging current is set to 1A, the heat is relatively large. As shown in the picture, a 3-digit digital tube in the upper left corner of the circuit board is not welded, because the author temporarily Its display function has not been used yet (can be used to display game scores) 6. The program does not use the buzzer, but the measured buzzer circuit works normally 7. Note: The model used for the 8x8 LED dot matrix is ​​CS1288BW (common anode). The point is not reflected in the circuit diagram! Please be sure to pay attention to 8. Note: The 3-digit digital tube uses model CS2351AW (common cathode), LED dot matrix and 3-digit digital tube can be purchased at Taobao store: Changsheng Electronics Factory official flagship store 9. Software Partly, there is currently no power saving mode. When the brightness is 0 (the display is turned off), it can run for about 3 days (two 18650 2600mAh batteries in parallel)
10. The software part uses EIDE+VSCODE to develop STC51, and uses STCISP to burn the program.
Known issues: 1. The battery percentage jumps quite sharply (plus or minus 20%), maybe because the ADC pin does not have capacitor filtering? The software uses a sliding filter algorithm, which reduces the floating to a certain extent
. Due to the author's limited circuit and programming skills, Please point out bugs and improvement suggestions on hardware and software! Thank you! QQ: 1583031618, welcome to disturb -By Sightseer. 2023/05/10AM