HKM-815891 Microcontroller Circuit Board with 14 Digital I/O Ports, 8 Analog Inputs, and PWM Support
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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Kristi
West Palm Beach, US
★★★★★ 1
Terrible sheets - absolutely terrible
Color: 02 - Pure White, Size: King
These are thin - so thin that I can see my mattress pad easily through them. They are rough in texture and quite possibly the worst sheets I've ever slept on. I ordered two sets, I'll be returning the second set that is unopened.
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Reviewed in the United States on May 1, 2026
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Amazon Customer
Charlottesville, US
★★★★★ 5
Bed Sheets
Color: 01 - Linen Beige, Size: Queen
The package was received in very good condition and the sheets were packed in a professional way. The queen size fit my bed very well with large pockets at the corners and strong elastic holding all around. The sheets do seem to be a bit heavier than I expected and were very wrinkled after the first washing. I ironed the pillow cases and they did up well. The material is a bit rougher than I expected, but I have slept very well with them and I am pleased overall.
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Reviewed in the United States on May 29, 2026
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K
Battle Creek, US
★★★★★ 5
Top quality sheets that are soft, cool, and absolutely worth it
Color: 02 - Pure White, Size: Queen, Color: 02 - Pure White, Size: Queen
Absolutely impressed with the quality of these sheets. I wanted to switch to cotton sheets to get the hotel feel, but have a lot of sensory issues and was worried that they would be scratchy. These sheets are incredibly soft, crisp, and smooth and are not rough at all. They are made with high quality stitching and didn’t have any loose strings. The pillowcases are also thick and heavyweight and are very durable. Some reviews complained about wrinkles, but this will absolutely not be an issue if you lightly steam your sheets after drying. It took 5 minutes and my sheets look so crisp and fresh. They also come with a cloth bag to put leftover pillowcases/bedding in which is so convenient to keep my extra set in. absolutely worth the quality and better than brands like brooklinen and west elm. I paired them with the bedside duvet + washed cotton duvet cover in bright white.
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Reviewed in the United States on April 25, 2026
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Carly
Lexington, US
★★★★★ 5
Natural fibers super soft
Color: 01 - Linen Beige, Size: King
Great quality, very warm. Love the textured and natural fibers! Makes a nice between layer. Natural “undyed” look.
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Reviewed in the United States on May 29, 2026
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Autumn
Belleville, US
★★★★★ 5
Great sheets
Color: 01 - Linen Beige, Size: King, Color: 01 - Linen Beige, Size: King
Super cute, cool and comfy
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Reviewed in the United States on May 25, 2026

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