WS2812 / NeoPixel LED Ring 12/16
by Generic
SKU: PSA-CMP-WS2812-RING
No reviews yetTypical India street price
₹80–₹220
Addressable RGB ring for compass HUDs, spinners, and art-tech.
Interface: Single-wire data
Drive an LED (with resistor) or the kit lamp output from the lamp pin.
Lamp/LED → D4 (GPIO2)
Blockly: set_lamp, set_led
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Concept
Each LED has a tiny controller; one data wire carries a bitstream that sets every pixel’s colour.
A little theory
WS2812 timing is strict (~800 kbps). 5 V pixels; 3.3 V data often works but a level shifter is safer. Current ≈ 60 mA per LED at full white — rings need a real 5 V supply. In the classroom, treat WS2812 / NeoPixel LED Ring 12/16 as a beginner part using Single-wire data. Typical India street price is about ₹80–₹220. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
FastLED or Adafruit_NeoPixel; set brightness low first. Data → DIN, 5 V & GND from PSU.
Classroom & project use
- POV spinner
- Status ring
- Angle indicator with MPU6050
Buying in India
Precautions
- External 5 V for >8 LEDs
- Add capacitor across 5V/GND
- Start at low brightness
Specifications
| Protocol | WS2812 |
| Colour | RGB |
| Voltage | 5V |
| Category | LEDs & Indicators |
| Difficulty | Beginner |
| Interface | Single-wire data |
Pinout
DIN | 5V | GND (DOUT to next ring if chained)
