CH32V003-based clock with TM1638 LED&KEY module and 1PPS sync.
| Signal | Pin |
|---|---|
| TM1638 CLK | PD0 |
| TM1638 DIO | PD3 |
| TM1638 STB | PD2 |
| 1PPS | PC1 |
| SWIO | PD1 |
| Button | Function | Button | Function |
|---|---|---|---|
| SW1 | Hours - | SW2 | Hours + |
| SW3 | Brightness - | SW4 | Minutes - |
| SW5 | Minutes + | SW6 | Brightness + |
| SW7 | Seconds - | SW8 | Seconds + |
make flash