Analog Watch/Clock with Arduino and and ST7789 IPS
YouTube videos:
- ST7789 IPS display
- Arduino Pro Mini
- DS1307 or DS3231 RTC module
- a button
- watch dial bitmap is reduced to 2 bits per pixel (4 colors) to fit in Arduino Pro Mini flash memory
- the bitmap in 240x240x2 bits uses only 14400 bytes, full project uses 30700 bytes
- a few alternative 2-bit dials
- watch hands are are vector based
- no floating-point arithmetic and slow trigonometric functions were used
| LCD pin | LCD pin name | Arduino |
|---|---|---|
| #01 | GND | GND |
| #02 | VCC | VCC (3.3V only!) |
| #03 | SCL | D13/SCK |
| #04 | SDA | D11/MOSI |
| #05 | RES | D9 or any digital |
| #06 | DC | D10 or any digital |
| #07 | BLK | NC |
If you find it useful and you want to buy me a coffee or a beer: