why's it got a pencil sharpener on the top?

Because it wouldn't fit on the bottom.

What are those blue connectors for? Can I see a connecting diagram or instructions of some sort?

The blue terminal blocks are for power connections. The 3-term block is for supply voltage, ground, and +5V out from on-board regulator. Each 2-term block is for a power circuit to a motor (voltage is same as supply). A search online for "l298n driver module" images gives a lot of useful connection diagrams. ST Microelectronics provides good technical documentation for the L298 IC, itself, which describes the power limitations.

I lose the voltage from 10v to 4.5v, as soon as I connect to motor controller. Any idea why it is happening and how to correct it?

I need a bit of context for your question. are you using a microcontroller with the L298? How many motors are you using? do you have a separate power supply for said source of controls? Are you using an arduino?

Is there a way for me to detect a stall using this driver?

No, there is no feedback from the motor to the driver. Possibly monitor the current used by the motor with a Hall Effect transducer and, if it exceeds a certain value, consider it stalled.

L298n Motor Drive Controller Board Module Dual H Bridge Dc

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚙️ Power your passion projects with precision and reliability!

HIGH CURRENT CAPACITY - Delivers up to 3A peak current ensuring strong motor torque
PLUG PLAY SIMPLICITY - No complex programming needed—perfect for rapid prototyping and professional projects
ROBUST VOLTAGE HANDLING - Supports 5V to 35V input for versatile project compatibility
DUAL H BRIDGE POWERHOUSE - Drive two DC motors or one 4-phase stepper with seamless efficiency
BUILT IN PROTECTION CIRCUITRY - Freewheeling diodes and large filter capacitors boost reliability and longevity

The L298N Motor Drive Controller Board is a compact, dual H-bridge module designed for Arduino and other microcontroller projects. It supports driving one 2-phase or 4-phase stepper motor or two DC motors with a wide voltage range of 5V to 35V and peak currents up to 3A. Featuring built-in freewheeling diodes and large filter capacitors, it ensures stable, reliable motor control with minimal heat generation. Ideal for professionals and makers seeking a robust, easy-to-use motor driver solution.

Specifications

ASIN	B014KMHSW6
Best Sellers Rank	#1,008 in Single Board Computers (Computers & Accessories)
Customer Reviews	4.6 4.6 out of 5 stars (396)
Date First Available	October 31, 2013
Item Package Quantity	1
Item Weight	0.704 ounces
Item model number	CECOMINOD012186
Manufacturer	Qunqi
Material	ABS
Part Number	MK-050
Product Dimensions	1.14 x 0.98 x 0.75 inches
Voltage	12 volts
Wattage	25 watts

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