This project is a compact night visibility safety light powered by an ESP32-C3 Mini V1.6.0.1 and a WS2812 12-LED ring.
It’s designed to increase visibility in dark or low-light conditions, making it ideal for safety

The system uses only three connections — 5V, GND, and GPIO8 (data) — directly soldered to the board.
Powered by USB or a small power bank, it can run for hours and is easy to attach to clothing, backpacks, or vehicles.

The LEDs alternate between red and blue flashing lights at 50% brightness, creating a highly visible warning pattern similar to emergency indicators.
This helps ensure that the user remains visible from a distance, especially on roads or during night walks.

Built with minimal components, this light is lightweight, portable, and completely 3D-printable for custom housings or mounts.
It demonstrates how a small microcontroller can provide real-world safety functionality with just a few lines of code.

parts:

• Board: ESP32-C3 Mini V1.6.0.1

• LED: WS2812 12-pixel ring

• Wiring: 5V → 5V, GND → GND, DI → GPIO8

• Library: Adafruit NeoPixel

• Effect: Red and blue alternating flash at 50% brightness

• Power: USB (5 V)

• 3 m5 screws 

• 3 small wires

• m6 rod bar

translucid filament for the “glass”

ARDUINO CODE FOR BLUE AND RED LIGHT:

#include <Adafruit_NeoPixel.h>

#define LED_PIN 8        // Pin dati collegato al DI del WS2812
#define NUM_LEDS 12      // Numero di LED sull'anello
#define BRIGHTNESS 127   // 50% di luminosità (0-255)

Adafruit_NeoPixel ring(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
 ring.begin();
 ring.setBrightness(BRIGHTNESS);
 ring.show(); // Spegne tutti i LED all’avvio
}

void loop() {
 // Accende tutti i LED in rosso
 for (int i = 0; i < NUM_LEDS; i++) {
   ring.setPixelColor(i, ring.Color(255, 0, 0)); // Rosso
 }
 ring.show();
 delay(500);

 // Accende tutti i LED in blu
 for (int i = 0; i < NUM_LEDS; i++) {
   ring.setPixelColor(i, ring.Color(0, 0, 255)); // Blu
 }
 ring.show();
 delay(500);
}