Mini Pro Professional Microcontroller Board: 14 Digital I/O, 8 Analogue Inputs on 33.3x18.0mm Circuit

For developers, educators, and hobbyists engaged in electronics prototyping, the Mini Pro professional version provides a comprehensive and compact microcontroller foundation. This electronic building block template centres on the Atmel Atmega328P-AU microcontroller, delivering a balance of processing capability and practical connectivity within a minimal 33.3mm by 18.0mm footprint. It is engineered to serve as the core of embedded systems, supporting a wide array of inputs and outputs for sensors, actuators, and user interfaces. The board’s design includes essential features like a 16MHz resonator for timing, a reset button for quick reboots, and mounting hole pin headers for secure physical integration into projects. Its support for both serial download programming and flexible power options makes it a versatile choice for iterative development and final installations alike.

Features and Construction

The Mini Pro board is defined by its specific technical parameters and physical build, offering a clear set of capabilities for circuit design. Its construction prioritises accessible connectivity and reliable operation in various project environments.

Material and Build

The core component is the Atmel Atmega328P-AU microcontroller, which handles all processing tasks. The board is built as a standard microcontroller circuit board, incorporating a 16MHz ceramic resonator to maintain accurate clock timing for program execution. Physical construction includes a reset button for manual system cycling and rows of mounting hole pin headers. These pin headers allow the board to be firmly attached to a surface or within an enclosure, preventing connection issues caused by movement or vibration during use.

Size and Practical Fit

The board's primary physical specification is its 33.3mm by 18.0mm dimensions. This compact size is a key differentiator, allowing it to fit into projects where space is at a premium, such as within custom enclosures, wearable electronics, or compact robotic platforms. Despite the small area, the layout accommodates all 22 digital and analogue ports, the microcontroller, resonator, and power circuitry without overcrowding. The inclusion of mounting holes via the pin headers means the board can be securely fastened, which is particularly important for mobile or portable applications where components might otherwise become loose.

Uses and Placement

This microcontroller board is designed to be the central processing unit in a broad spectrum of electronic projects. Its combination of I/O options and compact form factor opens up applications from professional prototyping to educational demonstrations.

Event or Professional Use

In professional or event-based settings, such as interactive installations, temporary displays, or product prototyping, the board’s reliability and standardised connections are valuable. The 14 digital I/O ports can manage binary devices like buttons, relays, or LED arrays, while the six PWM-capable ports allow for fine control over motor speed or lighting intensity. The eight analogue inputs are crucial for gathering data from environmental sensors measuring light, sound, or temperature. Support for an external DC power supply from 3.3V to 12V provides flexibility to integrate with existing power systems, and the TTL serial port enables communication with computers, displays, or other microcontrollers for data logging or remote control.

Everyday Home Use

For home hobbyists or educational purposes, the board serves as an accessible platform for learning electronics and programming. Its support for 9V battery power makes it suitable for portable, untethered projects like small robots or data loggers that can be moved around. The serial download capability allows users to program the board directly from a computer using common development environments. Projects might include automated plant watering systems using soil moisture sensors (analogue input) and a small water pump (digital/PWM output), or a simple home automation controller for lights and fans.

Benefits and Buying Value

The value of this microcontroller board lies in its specific configuration and the practical advantages it offers for building functional circuits without unnecessary complexity or bulk.

Reuse and Low Maintenance

The board is designed as a reusable building block. Once programmed for one task, it can be reprogrammed via serial download for a completely different application, making it a long-term component in a maker's toolkit. The solid-state design with no moving parts contributes to low maintenance, and the robust circuit board construction is intended for repeated use across multiple prototypes. The pin header connections are standard and durable, allowing wires and connectors to be attached and detached many times over the board’s lifespan.

Why Choose This Product

This product is a match for users who require a confirmed set of technical specifications: precisely 14 digital I/O ports, eight analogue inputs, six PWM outputs, and a 16MHz Atmega328P-AU microcontroller on a board measuring 33.3mm by 18.0mm. It eliminates guesswork regarding port count and processor type. The inclusion of both wide-range DC and 9V battery power support adds to its versatility compared to boards with fixed voltage requirements. For projects where the physical size is a constraint, its compact dimensions are a direct advantage over larger development boards, providing the same core functionality in a smaller package that is easier to house and install.