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Built-in project · Waveshare RP2040-Zero

RP2040-Zero NeoPixel

The Waveshare RP2040-Zero fades its own NeoPixel on GP16 around the color wheel. The whole build, a Waveshare RP2040-Zero, runs here in your browser on the firmware below; open it in the editor to change the wiring or the code and run it again.

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The parts retail for about $4. On Mokxi they're free.

RP2040-Zero NeoPixel · Waveshare RP2040-Zerolive0.000 s 0.00x
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The circuit itself, running here on the simulator. Press what can be pressed; click anything else to open it in the editor.

The code

The firmware exactly as the editor opens it. Change a line there and press Run: it compiles in the browser.

sketch.ino · Waveshare RP2040-Zero
// NeoPixel: the RP2040-Zero's own RGB LED.
//
// The only lamp on this board you can drive is a WS2812 on GP16
// (PIN_NEOPIXEL). There is no plain LED and no LED_BUILTIN.

#include <Adafruit_NeoPixel.h>

Adafruit_NeoPixel pixel(1, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);

void setup() {
  pixel.begin();
  pixel.setBrightness(60);
}

void loop() {
  for (long hue = 0; hue < 65536; hue += 2048) {
    pixel.setPixelColor(0, pixel.ColorHSV(hue));
    pixel.show();
    delay(40);
  }
}

Parts list

1 part, plus the jumper wires. They retail for about $4; on Mokxi they're free.

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