Electronic building block template Mini Pro ATMEGA328P 5V 16MHz microcontroller development board with 14 digital I/O pins, 8 analog inputs, PWM outputs, serial port, and 33.3x18.0mm compact size for circuit prototyping and electronics projects.
Mini Pro ATMEGA328P 5V 16MHz Electronic Building Block Template Development Board

This Mini Pro electronic building block template provides electronics enthusiasts, students, and developers with a compact microcontroller platform ready for circuit prototyping and project development. Measuring just 33.3mm by 18.0mm, this professional version development board centres around the Atmel Atmega328P-AU microcontroller running at 16MHz, offering a balanced combination of processing capability and physical compactness. The board comes pre-configured with 14 digital input/output pins, 8 analog inputs, and supporting circuitry including a reset button and mounting hole pin headers, requiring only your external components and programming to create functional electronic systems. With support for serial downloads and flexible power options from 3.3V to 12V DC or 9V battery connections, this template serves as a foundation for everything from basic learning projects to more complex electronic applications.
Features and Construction

The Mini Pro development board incorporates standard electronic components arranged on a printed circuit board to create a functional microcontroller platform. The compact 33.3mm x 18.0mm footprint makes efficient use of space while providing all essential connections for electronic projects. This design approach allows users to focus on their specific application requirements rather than basic microcontroller setup.
Material and Build
Constructed from standard PCB material with surface-mounted and through-hole electronic components, the Mini Pro board follows conventional electronics manufacturing practices. The Atmel Atmega328P-AU microcontroller serves as the central processing unit, with supporting components including a 16MHz resonator for timing accuracy, pin headers for external connections, and a reset button for system control. The board's design incorporates mounting hole pin headers that facilitate secure installation in projects or enclosures.
Size and Practical Fit
With dimensions of 33.3mm by 18.0mm, this development board offers a compact form factor suitable for space-constrained applications while maintaining accessible pin spacing for connection. The board's small size makes it appropriate for embedded projects, portable devices, or educational settings where physical space matters. Despite its compact dimensions, the board provides 22 accessible I/O pins (14 digital and 8 analog) plus power connections, offering substantial functionality relative to its physical footprint.
Uses and Placement

This electronic building block template serves as a foundational component in microcontroller-based projects, requiring additional electronic components to create complete systems. Its combination of digital and analog capabilities supports diverse applications from basic electronics education to more advanced prototyping work. The board's support for serial communication and PWM outputs expands its potential use cases across different electronic disciplines.
Event or Professional Use
For educational workshops, electronics classes, or professional prototyping sessions, this development board provides a ready-to-use microcontroller platform that reduces setup time. The included 14 digital input/output ports (with 6 capable of PWM output) and 8 analog inputs support sensor integration, motor control, LED systems, and data acquisition applications common in teaching and development environments. Support for serial downloads via the TTL level serial port (RX/TX) enables straightforward programming without additional hardware.
Everyday Home Use
For hobbyists creating custom electronics projects at home, this board offers a compact foundation for automation systems, environmental monitors, or interactive displays. The ability to power the board from a 9V battery or external DC supply between 3.3V and 12V provides flexibility for different project requirements and power sources. The reset button allows for convenient system restart during testing or if programmed behaviour needs interruption.
Benefits and Buying Value

This electronic building block template delivers value through its complete microcontroller implementation in a compact form, requiring only additional components to create working electronic systems. By providing the core processing and I/O infrastructure pre-configured on a single board, it eliminates the need for separate microcontroller, crystal, reset circuit, and voltage regulation components typically required in custom designs.
Reuse and Low Maintenance
The board's design supports repeated programming and use across different projects, with the Atmel Atmega328P-AU microcontroller supporting serial downloads for code updates. Standard pin headers enable connections to be made and remade as projects evolve or change. The board requires minimal maintenance beyond appropriate power supply connection and protection from physical damage during use.
Why Choose This Product
This Mini Pro development board offers a balanced combination of I/O capabilities, processing power, and physical compactness at 33.3mm x 18.0mm. With 14 digital ports (including 6 PWM-capable), 8 analog inputs, serial communication, and flexible power options, it provides substantial functionality for its size. The inclusion of mounting hole pin headers facilitates secure installation in projects, while the pre-configured microcontroller circuit reduces initial setup complexity compared to building equivalent functionality from discrete components.
