WS2812 datasheet(41/98 Pages) RASPBERRY-PI

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Powering NeoPixels

NeoPixels are usually described as “5 Volt devices,” but the reality is a little more nuanced than that.

Some (not all) NeoPixel products can work with slightly higher voltages. This depends on the additional support

components around the chip, based on available space, cost and the most likely application. Refer to the specific

product description page for guidance on acceptable voltage limits for each type. When in doubt, aim for 5 Volts.

Lower voltages are always acceptable, with the caveat that the LEDs will be slightly dimmer. There’s a limit below

which the LED will fail to light, or will start to show the wrong color.

Before connecting a NeoPixel strip to ANY source of

power, we very strongly recommend adding a large

capacitor (1000 µF, 6.3V or higher) across the + and –

terminals. This prevents the initial onrush of current

from damaging the pixels.

When connecting NeoPixels to any live power source or microcontroller, ALWAYS CONNECT GROUND (–)

BEFORE ANYTHING ELSE. Conversely, disconnect ground last when separating.

Adding a 300 to 500 Ohm resistor between your microcontroller's data pin and the data input on the first

NeoPixel can help prevent voltage spikes that might otherwise damage your first pixel. Please add one

between your micro and NeoPixels!

https://learn.adafruit.com/adafruit-neopixel-uberguide

Page 44 of 101

WS2812 Scheda tecnica(PDF) 41 Page - Raspberry Pi Holdings PLC