ST7735 Digital Clock

A low-cost 1.8" 160x128 color LCD clock, an ideal starter color display for clock kits.

Source book: Clocks and Watches
Kit page: https://dmccreary.github.io/clocks-and-watches/kits/st7735/
Printable one-pager: st7735-one-pager.html

Features

• Built-in font support for text rendering
• Efficient drawing primitives for shapes and lines
• Support for bitmap images
• Anti-flicker optimization in the clock code through selective updates
• Segment-based digit drawing for custom numerical displays

Benefits

• Free, open lessons: the Clocks and Watches textbook has the kit page, wiring, and MicroPython code.
• Ready-made curriculum: 7 additional lab pages walk students through the build step by step.
• Instant feedback: students see their code's results on lights or a display.
• Budget: under $10 (the display is about $3.50).

Parts

• Raspberry Pi Pico ($4) — Microcontroller
• ST7735 1.8" TFT — Display
• 830-Point Breadboard ($1.10) — Breadboard
• Micro-USB Data Cable ($2.50) — Power and programming cable