SKU: 26819310198

HKM-815891 Microcontroller Circuit Board with 14 Digital I/O Ports, 8 Analog Inputs, and PWM Support

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Description

HKM-815891 Microcontroller Circuit Board with 14 Digital I/O Ports, 8 Analog Inputs, and PWM SupportIntroducing the HKM 815891 Microcontroller Circuit Board, a versatile electronic building block designed for various projects and applications. This professional grade circuit board features an impressive array of capabilities tailored for both beginners and advanced users. With 14 digital input output portsincluding versatile options such as RX, TX, and pins D2 to D13this board allows for easy interfacing with sensors, actuators, and other devices.

Introducing the HKM-815891 Microcontroller Circuit Board, a versatile electronic building block designed for various projects and applications. This professional-grade circuit board features an impressive array of capabilities tailored for both beginners and advanced users.

With 14 digital input/output ports—including versatile options such as RX, TX, and pins D2 to D13—this board allows for easy interfacing with sensors, actuators, and other devices. It provides 8 analog input ports (A0 to A7) ensuring you can read varying voltage levels with precision. For projects requiring precise control, the HKM-815891 supports 6 PWM output ports located at D3, D5, D6, D9, D10, and D11, enabling you to manipulate the speed of motors or the brightness of lights with ease.

At its core, this circuit board utilizes the Atmel Atmega328P-AU microcontroller, providing reliable performance with a clock frequency of 16MHz. A reset button adds a layer of convenience, while the compact size of 33.3mm by 18.0mm makes it an ideal choice for tight spaces.

Powering the HKM-815891 is simple; it supports an external DC power supply ranging from 3.3V to 12V, as well as a 9V battery option, giving you flexibility in power management. The inclusion of a TTL level serial port transceiver (RX/TX) means you can easily connect and communicate with other devices in your projects.

Designed with mounting hole pin headers, it is straightforward to integrate into your own setup. Whether you are creating a prototype, building a hobby project, or developing an advanced electronic system, the HKM-815891 Microcontroller Circuit Board is a reliable and essential component to add to your toolkit.

Electronic building block template
The professional version of Mini Pro is a microcontroller circuit board. It has 14 digital input/output pins (6 of which can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, and mounting hole pin headers
Technical Parameters:

1. 14 digital input/output ports RX, TX, D2~D13,
2. 8 analog input ports A0~A7
3. 1 pair of TTL level serial port transceiver port RX/TX
4. 6 PWM ports, D3, D5, D6, D9, D10, D11
5. Using Atmel Atmega328P-AU microcontroller
6. Support serial download
7. Support external 3.3V~12V DC power supply
8. Support 9V battery power supply
9. Clock frequency 16MHz

10. Size: 33.3*18.0 (mm)



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SKU: 26819310198

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Mommy Sarah
Carnegie, US
★★★★★ 5
Dr. Suess. Enough Said.
Format: Hardcover, Format: Hardcover
Welcome to the whimsical world of Dr. Seuss, where "Oh, the Places You'll Go!" isn't just a book—it's a roadmap to life's most thrilling escapades! If life were a rollercoaster, this book would be the front-row seat to the wildest ride of all. From the moment you crack open its vibrant pages, you're whisked away on an exhilarating journey filled with colorful landscapes, quirky characters, and nuggets of wisdom disguised in Seussian rhymes. It's a literary wonderland where imagination reigns supreme, and the words dance off the pages, pulling you into an adventure unlike any other. Dr. Seuss, the maestro of whimsy and wonder, takes you on a whirlwind exploration of life's ups and downs, encouraging you to embrace every twist, turn, and unexpected detour with unbridled enthusiasm. Whether you're just starting out on life's path or navigating its winding roads, this book serves as a beacon of hope, inspiration, and boundless possibilities. Now, let's talk about the humor woven into every verse—oh, it's a riot! Dr. Seuss's playful language and zany illustrations transform life's perplexities into delightful puzzles to solve. You'll find yourself chuckling at the absurdity of the situations and nodding knowingly at the profound truths hidden within the jest. And oh, the illustrations! They're a visual feast for the eyes, bursting with vibrant hues and fantastical landscapes that transport you to worlds beyond your wildest dreams. The whimsical characters and their expressions evoke emotions that range from sheer joy to contemplative reflection, leaving an indelible mark on your heart. But wait, there's more! This book isn't just for kids—it's a timeless gem that resonates with readers of all ages. Whether you're 8 or 80, the wisdom embedded in its verses speaks volumes about the human spirit's resilience, determination, and unwavering courage to conquer life's myriad challenges. In essence, "Oh, the Places You'll Go!" isn't merely a book; it's a celebration of life's rollercoaster, a symphony of laughter, and a profound reminder that the journey itself is the greatest adventure of all. So, buckle up, embrace the whimsy, and get ready to soar to unimaginable heights—you're in for an exhilarating ride! *Disclaimer: May induce spontaneous outbreaks of giggles and an insatiable thirst for adventure!*
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Reviewed in the United States on November 15, 2023
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Eve Allen
Alexandria, US
★★★★★ 5
Oh, the places you'll go! Book Review
Format: Hardcover
Perfect hardcover book for such an affordable price!
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Destiny Evans
Fort Morgan, US
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Must have
Format: Hardcover
Great quality hard back book. I have purchased 4, one for each of my children and will eventually but 2 more. Highly recommend.
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Reviewed in the United States on May 18, 2026
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Donna K
Fort Morgan, US
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Makes a great graduation gift
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It's a classic! I bought it for my granddaughter's kindergarten graduation. I've asked her teacher to write a note in it.
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Brad layland
Los Angeles, US
★★★★★ 5
Meaningful, Enjoyable and Uplifting
Format: Paperback
I don’t read a lot of novels, but after hearing recommendation after recommendation, I finally picked up Theo of Golden—and it absolutely lived up to the hype. Alan Levi tells a story that is inspiring, wholesome, thoughtful, and genuinely fun to read. The characters felt real, the writing was engaging, and the story carried deeper themes about life, purpose, and relationships without ever feeling forced. I also know Alan through Young Life, which made reading the book even more special for me personally. If you’re looking for a meaningful novel that is both enjoyable and uplifting, I highly recommend this book.
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Reviewed in the United States on May 23, 2026

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