bibliopixel.drivers.SPI.APA102 module¶

class bibliopixel.drivers.SPI.APA102.APA102(num, gamma=<bibliopixel.colors.gamma.Gamma object>, **kwargs)[source]¶

Bases: bibliopixel.drivers.SPI.base.SPIBase

Driver for APA102/SK9822 based LED strips on devices like the Raspberry Pi and BeagleBone

Provides the same parameters as bibliopixel.drivers.SPI.SPIBase

set_device_brightness(val)[source]¶

APA102 & SK9822 support on-chip brightness control, allowing greater color depth.

APA102 superimposes a 440Hz PWM on the 19kHz base PWM to control brightness. SK9822 uses a base 4.7kHz PWM but controls brightness with a variable current source.

Because of this SK9822 will have much less flicker at lower levels. Either way, this option is better and faster than scaling in BiblioPixel.