Has anyone found gears that fit the shaft? The ones shown in "frequntly bought together" are for smaller round shafts.

for anyone looking for this, 5mm shaft, its "flat" part fits a rectangle 3mmx5mm.

Could i use the driver to control a slightly bigger pm55l-048? i would probably need to push 19v through the uln2003.

Yes, you can use the driver to control pm55l-048, the maxmum voltage of ULN2003 can reach 24V.

what is it supposed to do?

It, or they, do nothing - - until you connect a smart source of drive signals. The included "driver boards" are electrical signal drivers to boost the strength of those signals. You might connect these boards between the motors and an Arduino or a Raspberry Pi or some manual speed control circuits for the stepper motors. The signals have to be the rippling sequence of logic pulses needed by the stepper motors. Because these motors have 64:1 gears, you program 64 sequences to get the shaft to go one full turn. Naturally, the gears trade off speed (RPM) for strength (torque) of turning. They also gain precision of output shaft position, which can be moved in STEPS, or fractions, of 1 sixty-fourth of a turn. If your only interest is in speed control, not positioning, you may want to look into DC motors (or gearmotors) and 'H-bridge drivers' and PWM (Pulse Width Modulation) controls.

Do you have instructions on how to set it up/test it with arduino? (newbe)

Google: "arduino 28BYJ-48 sample code" You will get plenty of examples to get you started. Good luck.

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ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor with ULN2003 Driver Board

ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor with ULN2003 Driver Board

Product ID: 81603210

Details

Brand
ELEGOO
Material
Metal Plastic
Model Name
EL-SM-003
Speed
9.38 rpm
Voltage
5 volts

💡Onboard LEDs for coil sequence

🔋5V unipolar geared stepper motors

⚙️5 matched motor-driver sets

€ 30.27

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Power your prototypes with precision and style!

PLUG PLAY SIMPLICITY - ULN2003 driver boards with LED indicators make setup and debugging a breeze.
VERSATILE COMPATIBILITY - Seamlessly integrates with Arduino and other microcontrollers for robotics and automation.
BUILD 5 PROJECTS AT ONCE - Five complete motor-driver sets for multitasking makers and classroom pros.
PRECISION LOW SPEED CONTROL - 1:64 gear reduction ensures smooth, accurate motion at 9.38 RPM.
RELIABLE READY TO REPLACE - Includes jumper wires and spare motors for uninterrupted prototyping flow.

ELEGOO’s 5-set 28BYJ-48 stepper motors paired with ULN2003 driver boards deliver reliable, low-speed motion control at 5V. Designed for makers, educators, and robotics enthusiasts, this kit supports multiple simultaneous projects with easy Arduino compatibility and visual coil-sequence feedback for streamlined setup.

Specifications

ASIN	B01CP18J4A
Best Sellers Rank	#15,503 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in 3D Printer Interface & Driver Modules
Brand Name	ELEGOO
Customer Reviews	4.6 4.6 out of 5 stars (828)
Global Trade Identification Number	06976021760015
Included Components	Female to Male Cable
Item Highlight	Compatible with Arduino, Suitable for Robotics, Automation and Motion-Control Projects, Standard Interface, Direct Docking
Item Weight	0.21 kg
Manufacturer	ELEGOO
Material Type	Metal, Plastic, Glass/Acrylic
Model	EL-SM-003
Model Name	EL-SM-003
Number of Items	5
Number of Packs	5
Part Number	EL-SM-003
Speed	9.38 rpm
UPC	746591610357
Unit Count	5 Count
Voltage	5 volts

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