Waveshare round LCD modules with the GC9A01 driver create eye-catching circular displays for gauges, speedometers, and dashboard instruments.
Specs
- 1.28-inch round IPS, 240×240, GC9A01
- SPI interface, 65K colours
- Available as standalone module or integrated on RP2040/ESP32 boards
Recommended: Waveshare ESP32-S3-Nano Development Board
Setup
Connect via SPI. Use gc9a01 MicroPython driver or TFT_eSPI for Arduino.
Drawing Circular Graphics
- Use polar to cartesian conversion: x = cx + r*cos(theta), y = cy + r*sin(theta)
- Draw gauge arcs by plotting points along circumference
- Stay within 120-pixel radius from centre
Projects
- Analogue clock with second hand
- Car-style speedometer/tachometer
- Temperature gauge with colour zones
- Compass display with magnetometer
- CPU load meter for desktop
Recommended: Waveshare 2.8inch Touch LCD Shield for Arduino
Tips
- Pre-calculate sine/cosine lookup table for faster rendering.
- Only redraw changed elements (hands, needles) not entire background.
- Use anti-aliased line algorithms for smooth gauge needles.
Frequently Asked Questions
Other sizes available?
Yes, 1.28-inch and 1.69-inch round modules from Waveshare.
Refresh rate?
SPI-based, typically 20-40 FPS.
Touchscreen version?
Some round displays include capacitive touch.
Best MCU for this?
RP2040 or ESP32-S3 with PSRAM for smooth graphics.
Conclusion
Round LCD displays bring a premium, instrument-like look to gauge and clock projects.
Browse the full Waveshare collection at Zbotic.in with fast shipping across India.
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