SKU: 26819310198

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

Sale price$60.29 Regular price$66.99
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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)



Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 26819310198

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CWT
Bozeman, US
★★★★★ 5
Awesome cover worth the money
Size: 55 Inch, Color: black
Nice and heavy duty. Been a heavy rain season this year and this cover is a champ. It's thick and easy to use. Did my cheapo nexgrill 5 burner perfectly.
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Reviewed in the United States on March 29, 2026
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GM
Birmingham, US
★★★★★ 5
I got 6 years use out of it and just re-ordered a new one! Best grill cover I’ve ever purchased.
Size: 50 Inch, Color: black, Size: 50 Inch, Color: black
Very durable! I noticed earlier this spring that mine was starting to rip after several strong spring wind storms. I knew I had had it for several years but I wasn’t sure how long. I went in my orders page and saw that I ordered it back in 2020 so I got 6 years out of it!! Note that it stays outside on the deck all year round, and that includes during Northeast US winters with frigid temperatures and snow and I only now started to see the tears in it this spring. The tear started at the top of the grill, and actually started falling apart more after I touched it. Refer to the attached photos of mine after 6 years. I think it’s very durable for sitting outside for 6 years and only now only starting to show wear . You can also see how it didn’t really fade despite getting full afternoon sunlight. The velcro ties at the bottom,are also a plus as far as getting it to stay in place and not blow off. That’s why I definitely just repurchased the same one. Hopefully, I will get at least 6 years out of the new one when it arrives tomorrow.
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Reviewed in the United States on May 26, 2026
B
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Brandon Jimenez
New York, US
★★★★★ 5
Looks sharp, concert black, comfortable some stretch
Size: Medium, Color: Black
I bought this for my son to wear at his band concerts, and it’s been perfect. He’s about 5’8” and 155 lbs, and I got him a men’s medium—it fits really well with a comfortable, true-to-size feel. The quality is excellent: soft, lightweight, and breathable, with just enough stretch so he has the flexibility he needs while playing trombone. It also looks really sharp on stage.
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Reviewed in the United States on May 12, 2026
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Shania Seeraj
Pawtucket, US
★★★★★ 5
Great
Size: Medium, Color: Black
The sleeves are exactly how it’s showing on the picture. The size is great. I believe it’s a good value for money. The color is amazing. The quality is great. It’s very light and it’s very comfortable.
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Reviewed in the United States on May 7, 2026
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Dee
Cuba, US
★★★★★ 5
Snazzy shirt
Size: Large, Color: Black
Fits great & looks wonderful. Can be worn casually or for work. Very wrinkly, just toss it in the dryer and they will come right out. It's lightweight & cool.
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Reviewed in the United States on May 29, 2026

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