Datasheet

Best Practices

Improper use can damage your NeoPixels. Before diving in, be

aware of the following:

Before connecting NeoPixels to any power source, add a large capacitor (1000 µF, 6.3V or

higher) across the + and – terminals as shown above.

Place a 300 to 500 Ohm resistor between the Arduino data output pin and the input to the

first NeoPixel. This resistor must be at the NeoPixel end of the wire to be effective! Some

products already incorporate this resistor…if you’re not sure, add one…there’s no harm in

doubling up!

Try to minimize the distance between the Arduino and first pixel.

Avoid connecting NeoPixels to a live circuit. If you simply must, always connect ground

first, then +5V, then data. Disconnect in the reverse order.

If powering the pixels with a separate supply, apply power to the pixels before applying power

to the microcontroller.

Observe the same precautions as you would for any static-sensitive part; ground yourself

before handling, etc.

NeoPixels powered by 5v require a 5V data signal. If using a 3.3V microcontroller you must

use a logic level shifter such as a 74AHCT125 (http://adafru.it/e5g) or

74HCT245 (http://adafru.it/1779). (If you are powering your NeoPixels with 3.7v like from a

LiPoly, a 3.3v data signal is OK)

Make sure that your connections are secure. Alligator clips do not make reliable connections