will this allow me to run an effect down a signal ws2812b led string that is 30 led/m and 6 meters long? a total of 180 pixels?

It depneds on your controller , some controller max control 512pixels , some max control 1024pixels , some max control 2048pixels etc . Using SP901E amplifier depend on your project pixel QTY and your controller . You project is 180 pixels , very less . So you don't need the this singal amplifier .

Does this work with ws2815b led strips?

Yes it worked with my ws2815b strips from BTS Lighting

Does this thing duplicate the output on all 4 channels, or can i control every LED individually?

this thing duplicate the output on all 4 channels

Will this provide power to controller or do i got to power controller separately?

Hello, it provides power to the controller. You connect the power supply to the sp901e and it will give power to the controller.

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Description

✨ Amplify your LED dreams—light up like a pro! ⚡

CASCADE FOR SCALE - Stack multiple amplifiers to expand your dream color lighting projects effortlessly.
POWER FLEXIBILITY - Supports 5V to 24V DC input, perfect for diverse LED projects without voltage worries.
AMPLIFY YOUR LED UNIVERSE - Boost your RGB LED strips with 8 simultaneous output channels for flawless, synchronized lighting.
PLUG PLAY WITH CONTROLLERS - Designed to work alongside popular controllers like K-1000C, Raspberry Pi, and Arduino for ultimate creative control.
UNIVERSAL SIGNAL COMPATIBILITY - Works seamlessly with WS2812B, WS2811, SK6812, APA102, and more—future-proof your lighting setup.

The BTF-LIGHTING SP901E is a high-performance SPI signal amplifier designed for professional-grade addressable RGB LED strips. Supporting a broad voltage range (5-24V DC) and over 15 LED IC types, it outputs up to 8 synchronized channels, enabling expansive and complex lighting setups. Ideal for small to medium dream color projects, it works in tandem with popular controllers and allows cascading for scalable installations. Note: It amplifies signals but does not regulate voltage, so matching power supply voltage is essential.

Specifications

Item dimensions L x W x H	5.51 x 2.2 x 1.1 inches
Voltage	5 Volts
Manufacturer	BTF-LIGHTING Technology Co., Limited
Maximum Supply Voltage	24 Volts (DC)
Minimum Supply Voltage	5 Volts (DC)
Mounting Type	Freestanding
Brand	BTF-LIGHTING
Number of Channels	8
Operating Temperature	6E+1 Degrees Celsius
Output Power	5E+1 Milliwatts
Package Type Name	anti-static bag or retail box
Specification Met	Specifications Relevant to Intended Use
Material	Plastic
Part Number	SP901E
Item Weight	7.8 ounces
Product Dimensions	5.51 x 2.2 x 1.1 inches
Item model number	SP901E
Assembled Height	28 millimeters
Assembled Length	14 centimeters
Assembled Width	5.6 centimeters
Item Package Quantity	1
Style	Modern
Color	Black
Shape	Circular
Number of Lights	10000
Specific Uses	Indoor use only
Special Features	Dimmable
Shade Material	Plastic
Light Direction	Adjustable
Power Source	DC
Batteries Included?	No
Batteries Required?	No
Type of Bulb	LED
Wattage	200 watts

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