I cannot get this to work with a 3.5~9v dc pump (which can be controlled via an inline usb unit similar to this). what resistor is tied to the pot?

It is a PWM. It should work with a DC motor in most instances.

What size hole for the shaft?

Need more information about the shaft.

I need to adjust output voltage 0-5vdc (to motor) using 15vdc in (power), will this do that ?

This cannot be done. This is just a speed-regulating motor with a maximum current of 2A. If the continuous current exceeds 0.5A, it won't work. It is not recommended to connect with a voltage exceeding 12v, which may cause damage to the controller

Can this work as a dc light dimmer?

It should work ok as a low voltage dimmer. Probably OK for LEDs

3pcs 1 8v 3v 5v 6v 7 2v 12v 2a | Desertcart Malaysia

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RM368

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Description

⚙️ Master your motor’s rhythm with precision and safety — don’t get left behind!

BUILT IN SAFETY FUSE - Self-recovering 2A fuse protects your device from overloads, ensuring worry-free operation.
COMPACT LIGHTWEIGHT - At just 32x32x15mm and 14g, it fits effortlessly into any setup without bulk or weight.
PRECISION SPEED CONTROL - Fine-tune your DC motor speed seamlessly from 0% to 100% PWM duty cycle for ultimate performance.
INTEGRATED ON OFF SWITCH - Convenient switch function doubles as an on/off toggle, simplifying motor control in one sleek package.
UNIVERSAL VOLTAGE COMPATIBILITY - Supports a wide input range from 1.8V up to 15V DC, perfect for diverse DIY and professional projects.

The Onyehn 1803BK PWM DC Motor Speed Controller is a compact, versatile device designed to deliver up to 2A continuous current and 30W power. It offers precise speed adjustment via PWM from 0% to 100%, includes a self-recovering fuse for overload protection, and features an integrated on/off switch with a power indicator LED. Compatible with 1.8V to 15V DC motors, it’s ideal for DIY enthusiasts and professionals seeking reliable, safe, and efficient motor speed control.

Specifications

ASIN	B07NPJ5MQR
Brand	Onyehn
Brand Name	Onyehn
Circuit Type	series
Colour	Green
Connector Type Used on Cable	No external connector required
Contact Type	Spdt
Country of Origin	USA
Current Rating	2 Amps
Customer Reviews	4.4 out of 5 stars 182 Reviews
Item Weight	78 Grams
Manufacturer	Onyehn
Material Type	Plastic
Model Number	1803BK
Number of Positions	6
Operating Voltage	15 Volts (DC)
Operation Mode	automatic
Part Number	1803BK
Voltage	15 Volts (DC)
Wattage	30 Watts

Reviews

A**R

Works great, good value for price

Used with a small dc motor with 2 AA batteries for a diy stem kit type thing. This doubles as an on/off switch when turned all the way, it clicks off. Worked as expected.

19.04.2025

H**.

Awesome product

I haven't tried 12v but every over input and output, worked wonderful, would recommend 100% . I'm wondering if you they do big bulk

17.07.2020

J**N

Quick Test Run

Out the box with a quick test run, all 6 worked fine. Not sure about long usage, I just received them. Sturdy and easy to use. Speed control is awesome and if they hold-up, they will work perfectly for my project

29.03.2022

E**P

Stumps garage on you tube

Works great

1.08.2025

E**.

These speed controllers work perfect and got here fast

These speed controllers work perfectly and got here fast and are highly reliable. Great product, well manufactured.

24.09.2020

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