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

ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor

Product ID: 81603210

Details

Brand
ELEGOO
Material
Metal Plastic
Model Name
EL-SM-003
Speed
9.38 RPM
Voltage
5 Volts

💡4-phase LED status indicators

🔌Plug-and-play ULN2003 driver board

⚙️5V precision stepper motor

€ 33.99

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Description

⚡ Elevate your DIY game with precision motion—because your projects deserve the best!

VISUAL FEEDBACK - Built-in 4-phase LED indicators keep you informed on motor status at a glance.
COMPACT DURABLE - Small footprint (1.37x1.18x0.6 in) with robust metal and plastic build for long-lasting use.
COMPLETE 5 SET KIT - Five motor-driver combos plus cables and a surprise gift—ready to fuel your projects.
PLUG PLAY POWERHOUSE - Seamlessly connect with Arduino and other dev boards for instant prototyping.
PRECISION MOTION CONTROL - 9.38 RPM stepper motor ensures smooth, accurate rotations every time.

The ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor kit includes five high-precision stepper motors paired with ULN2003 driver boards, fully compatible with Arduino and other development platforms. Featuring plug-and-play connectivity, 4-phase LED status indicators, and a compact, durable design, this kit is ideal for prototyping, robotics, and 3D printing projects. With a rated speed of 9.38 RPM and complete wiring included, it offers a reliable, ready-to-use solution for makers and professionals alike.

Specifications

ASIN	B01CP18J4A
Best Sellers Rank	#15,009 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 Weight	0.21 Kilograms
Manufacturer	ELEGOO
Material Type	Metal, Plastic, Glass/Acrylic
Model	EL-SM-003
Model Name	EL-SM-003
Part Number	EL-SM-003
Speed	9.38 RPM
UPC	746591610357
Unit Count	5.0 Count
Voltage	5 Volts

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€ 33.99

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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