Will this work for a 2 phase 4 wire stepper motor?

The stepper motors work well if they are connected to drivers and with arduino and the speed can be varied, but directly connected to a speed control I have not done it before.

How do you make fan run in reverse

Well if it is a fan like those used by computers, they only have one direction where the air blows and to put them in reverse so that it blows in the opposite direction, simply turn it around. But DC motors positive and negative connection can turn in either direction clockwise or counter clockwise and can be easily controlled by inverting the polarity of the applied voltage so this motor speed controller can be used it.

can this be used as a dimmer for 24 volt LED strip?

yes of course you can use it like this too but this is limited for the current of several 16 feet led strip lights, I recommend you better use a DC12-24 30A dimmer for better results, you can buy it on ebay for $12

What size gauge wire would I use to wire this to a 775 motor

Size on the board: 32mm*15mm*50mm, what type of line do you need to connect

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RioRand 6V 12V 24V 28V 3A 80W DC Motor Speed Controller PWM Speed Adjustable Reversible Switch 1203BB DC Motor Driver Reversing

RioRand 6V 12V 24V 28V 3A 80W DC Motor Speed Controller PWM Speed Adjustable Reversible Switch 1203BB DC Motor Driver Reversing

Product ID: 487493168

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Details

Color
1203BB
Brand
RioRand
Voltage
24 Volts
Material
Copper
Display Type
LED

⚡6-28V wide voltage range

📏Compact 3.2x5x1.5 cm size

🔄Reversible motor control

Description

⚙️ Master your motor’s pace with precision and power!

POWER YOUR PRECISION - Supports up to 80W output for smooth, reliable motor control
COMPACT LIGHTWEIGHT - Slim 3.2x5x1.5 cm design fits tight spaces without bulk
FLEXIBLE VOLTAGE RANGE - Operates seamlessly from 6V to 28V DC to fit diverse projects
INTUITIVE SPEED ADJUSTMENT - Built-in potentiometer switch for precise PWM speed tuning
EFFORTLESS DIRECTION CONTROL - Reversible switch lets you change motor direction instantly

The RioRand RR-PWM-3A DC Motor Speed Controller offers adjustable PWM speed control with a reversible switch, supporting a wide input voltage range of 6-28V DC and delivering up to 3A continuous current and 80W power. Its compact size and built-in potentiometer make it ideal for professional-grade motor management in compact setups.

Specifications

Brand	RioRand
Manufacturer	RioRand
Country of Origin	USA
Model number	RR-PWM-3A
Colour	1203bb
Number of Memory Sticks	1
Item Weight	30 g
Product Dimensions	5.08 x 3.3 x 1.02 cm; 30 g
Item model number	RR-PWM-3A
Item Height	0.4 Inches
Item Width	1.3 Inches
Voltage	24 Volts
Power Source	Corded Electric
Included Components	1 x RioRand dc motor speed controller
Are batteries included?	No

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