Example project · Displays
NeoPixel ring rainbow
An ESP32-C3 running real MicroPython chases a rainbow around a 12-pixel WS2812 ring — the genuine 800 kHz protocol, decoded with cycle accuracy. Edit the colors in the Code tab.
What's on the bench
- Battery
- ESP32-C3
- NeoPixel ring ×12
How it's wired
- hole a10→hole B-5
- hole a11→hole B+5
- hole a40→hole B+9
- hole a42→hole B-9
- hole a14→hole c41
The code
This MicroPython script runs on the emulated board every boot; edit it in the Code tab.
# Rainbow chase around the 12-pixel ring (DIN on G2). import machine, neopixel, time RAINBOW = [ (255, 0, 0), (255, 96, 0), (255, 200, 0), (96, 255, 0), (0, 255, 60), (0, 255, 200), (0, 160, 255), (0, 40, 255), (90, 0, 255), (200, 0, 255), (255, 0, 160), (255, 0, 60), ] np = neopixel.NeoPixel(machine.Pin(2), 12) for step in range(600): for i in range(12): np[i] = RAINBOW[(i + step) % 12] np.write() time.sleep_ms(120) print('ring demo done')
