Pro Mini Development Board – ATmega328P (Arduino-Compatible)
Maximize performance while minimizing size with the Pro Mini ATmega328P Development Board. Engineered for advanced makers, professional developers, and semi-permanent embedded system installations, this ultra-lightweight board packs the full processing power of an Arduino Uno into a minimalist, space-saving layout.
By moving the bulky USB-to-serial hardware off-board, the Pro Mini dramatically drops its overall weight and profile. This makes it the ultimate, cost-effective micro-brain for tight configurations like drones, smart wearable devices, remote miniature data loggers, and custom low-power sensor arrays.
Key Features
Full Uno Functionality, Quarter of the Size: Powered by the core ATmega328P-AU microcontroller, matching the identical programming power, library support, and execution logic of the standard Uno R3.
Minimalist & Lightweight Footprint: Stripped of non-essential hardware sockets, this ultra-thin 0.8mm PCB weighs under 2 grams to avoid adding unnecessary bulk to portable builds.
Headers Shipped Unsoldered: Ships without pre-mounted connectors, giving you full creative flexibility to directly solder structural hookup wires or custom header combinations.
Expanded Data Capture: Breaks out 8 full analog inputs (A0 to A7) compared to the standard 6 inputs found on larger form factor boards.
Off-Board USB Interfacing: Built with a standard 6-pin interface socket ready to bridge directly to external FTDI or CH340 USB-to-TTL breakout boards for lightning-fast code uploads.
Technical Specifications
Feature | Specification |
Microcontroller | ATmega328P (8-bit AVR architecture) |
Circuit Operating Voltage | 5V |
Input Voltage Range (RAW Pin) | 5V – 12V DC |
Digital I/O Pins | 14 (of which 6 provide hardware PWM output) |
Analog Input Pins | 8 Channels (10-bit resolution) |
DC Current per I/O Pin | 40 mA (Max limit per pin) |
Flash Memory | 32 KB (of which 0.5 KB is utilized by the bootloader) |
SRAM / EEPROM | 2 KB / 1 KB |
Clock Speed | 16 MHz (driven by external onboard resonator) |
Board Dimensions | 33 mm x 18 mm x 3.5 mm |
Board Hardware Mapping & Pinout
The Pro Mini provides standard 0.1-inch spacing layout pins for flawless integration into high-density prototype projects:
Power Pin Routing: VCC delivers the regulated 5V internal rail. RAW handles unregulated external battery inputs (up to 12V), dropping the incoming voltage clean down to 5V via the internal regulator.
Dedicated Interrupts: Pins D2 and D3 support hardware external interrupt commands for time-critical, sensor-driven events.
Pulse Width Modulation (PWM): Pins D3, D5, D6, D9, D10, and D11 provide native 8-bit analog write functionality for motors and dimming arrays.
Communication Interfaces: Built-in hardware links support UART Serial (D0-RX, D1-TX), I2C communication (A4-SDA, A5-SCL), and dedicated SPI buses (D10-SS, D11-MOSI, D12-MISO, D13-SCK).
Common Applications
Aerospace & Drone Building: Ideal micro-controller for flight telemetry trackers, custom gimbal stabilizing platforms, and compact multi-rotor accessories.
Wearable Hardware Devices: Fits cleanly inside miniature enclosures for smart health arrays or custom wrist-wearable indicators.
Low-Power Smart Grid Tech: Deployable inside battery-operated smart irrigation meters or remote data collecting nodes that enter sleep cycles.
Developer Selection Tip: The Pro Mini requires an external USB-to-TTL adapter to upload code sketches from your PC via the Arduino IDE. Select "Arduino Pro or Pro Mini" under the Board Manager menu and verify your operating processor settings match the 5V / 16MHz configuration prior to flashing.
Package Includes:
1 x Pro Mini ATmega328P 5V/16MHz Development Board
1 x Set of Unsoldered Male Berg Header Connector Strips