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 + ULN2003 Driver Board Compatible with Arduino

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

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 & play ULN2003 driver board

⚙️64:1 gear ratio for max torque

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Description

⚙️ Power your projects with precision — don’t get left behind in the maker revolution!

REAL TIME DIAGNOSTICS - Built-in 4-phase LED indicators let you instantly monitor motor status and troubleshoot with ease.
EFFORTLESS INTEGRATION - Direct plug-and-play compatibility with Arduino and other microcontrollers—no soldering required.
VERSATILE 5 SET BUNDLE - Five motors plus driver boards in one box—perfect for scaling up your maker projects or prototypes.
COMPACT ROBUST DESIGN - Small footprint with durable aluminum casing ensures reliable performance without overheating in typical use.
PRECISION TORQUE POWERHOUSE - 64:1 internal gearing delivers smooth, high-torque motion for your robotics and CNC projects.

The ELEGOO 5 Sets 28BYJ-48 ULN2003 Stepper Motor kit offers five compact, high-torque 5V stepper motors paired with ULN2003 driver boards. Designed for seamless Arduino compatibility, these motors feature a 64:1 gear ratio for precise control and built-in LED indicators for easy troubleshooting. Ideal for beginners and pros alike, this plug-and-play set supports a wide range of robotics, CNC, and 3D printing applications, delivering reliable performance in a compact, durable package.

Specifications

ASIN	B01CP18J4A
Brand Name	ELEGOO
Customer Reviews	4.6 4.6 out of 5 stars (821)
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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¥4963

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In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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