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

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10pcs 1803BK Low Voltage DC Motor Adjustable w/Speed Control Knob

10pcs 1803BK Low Voltage DC Motor Adjustable w/Speed Control Knob

Product ID: 114286017

Details

Brand
Onyehn
Color
Green
Contact Type
Spdt
Current Rating
2 A
Voltage
15

⚡2A max current rating

🎛️0-100% PWM speed control

🛡️Self-recovery fuse protection

E£ 2866

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎯 Master your motor’s pace with precision and protection!

BUILT IN SAFETY FUSE - 2A self-recovery fuse automatically protects your circuit from overloads, ensuring worry-free operation.
PRECISION SPEED CONTROL - Adjust motor speed seamlessly from 0% to 100% with a tactile knob for ultimate customization.
COMPACT DURABLE DESIGN - Sleek 1.26" x 1.26" metal and plastic build fits effortlessly into any project setup.
PLUG AND PLAY SIMPLICITY - Manual potentiometer control with clear LED indicator makes installation and monitoring intuitive.
WIDE VOLTAGE COMPATIBILITY - Operates safely between 1.8V to 15V DC, perfect for low voltage applications without risk of damage.

The Onyehn 1803BK is a compact, low voltage DC motor speed controller featuring a 2A self-recovery fuse and PWM-based speed adjustment from 0% to 100%. Designed for safe, reliable operation within 1.8V to 15V DC, it offers manual control via a potentiometer knob and includes a power-on LED indicator. Ideal for professionals seeking precise motor speed regulation with built-in overload protection.

Specifications

ASIN	B07NPJ5MQR
Best Sellers Rank	#263,888 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #167 in Electrical Motor Controls
Brand Name	Onyehn
Circuit Type	series
Color	Green
Connector Type Used on Cable	None Required
Contact Type	Spdt
Control Type	Manual
Current Rating	2 A
Customer Reviews	4.4 4.4 out of 5 stars (194)
Item Dimensions L x W x H	1.26"L x 1.26"W x 0.59"H
Item Weight	78 g
Manufacturer	Onyehn
Material Type	Metal, Plastic
Model	1803BK
Operating Voltage	15 volts_of_direct_current
Operation Mode	Automatically,Off
Part Number	1803BK
Switch Type	Potentiometer
Unit Count	10 Count
Voltage	15 volts_of_direct_current
Wattage	30 watts

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