ST7789_Watch_2bit
Analog Watch/Clock with Arduino and and ST7789 IPS
YouTube videos:
https://youtu.be/jFGDFuLhdMc
https://youtu.be/35Z0enhEYqM
BOM
- ST7789 IPS display
- Arduino Pro Mini
- DS1307 or DS3231 RTC module
- a button
Features
- 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
Connections:
| 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:
https://www.paypal.me/cbm80amiga