Pro Mini ATMEGA328P 5V/16MHz & 3.3V/8MHz Arduino Board
Pro Mini ATMEGA328P 5V/16MHz & 3.3V/8MHz Arduino Board
Pro Mini ATMEGA328P Development Board for Arduino Projects
The Pro Mini ATMEGA328P is a compact, versatile microcontroller development board designed for makers, hobbyists, and engineers building Arduino-compatible projects. Available in two configurations — 5V/16MHz and 3.3V/8MHz — this board delivers reliable performance in a space-saving SMD package, making it ideal for embedded systems, prototyping, and DIY electronics builds.
Key Features
- Dual Voltage Options: Choose between 5V at 16MHz for full-speed operation or 3.3V at 8MHz for low-power and 3.3V-logic projects
- ATMEGA328P Microcontroller: The same trusted chip at the core of the standard Arduino Uno, offering broad community support and library compatibility
- Supply Voltage Range: Accepts 3.3V to 12V input for flexible power sourcing
- Analog Inputs: A0–A7 analog input pins for sensor integration and data acquisition
- Compact SMD Package: Minimal footprint, perfect for space-constrained enclosures and wearable electronics
- No High-Concern Chemicals: Built without flagged hazardous substances for safer handling
- Arduino IDE Compatible: Program directly via the Arduino IDE using a standard FTDI/USB-to-serial adapter
- Condition: Brand new
Specifications
- Microcontroller: ATmega328P
- Operating Voltage Options: 5V (16MHz) / 3.3V (8MHz)
- Supply Voltage: 3.3V – 12V
- Analog Pins: A0 – A7
- Package Type: SMD
- Quantity: 1 board per order
Made in Mainland China.
What Can You Build With It?
This board is perfect for a huge range of Arduino-compatible DIY builds: sensor nodes, robotics controllers, home automation modules, data loggers, LED projects, and more. Its ultra-compact form factor makes it especially popular for wearable tech and tight-space installations where a full-sized Arduino would not fit.
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Frequently Asked Questions
Q: What is the difference between the 5V/16MHz and 3.3V/8MHz versions of the Pro Mini ATMEGA328P?
A: The 5V/16MHz version runs at full speed and is compatible with standard 5V Arduino shields and sensors. The 3.3V/8MHz version operates at a lower voltage and clock speed, making it ideal for interfacing with 3.3V peripherals (such as certain GPS, Bluetooth, or Wi-Fi modules) and for power-sensitive or battery-operated applications.
Q: Do I need a special programmer or adapter to upload sketches to the Pro Mini ATMEGA328P?
A: Yes. Unlike Arduino boards with a built-in USB chip, the Pro Mini requires an external USB-to-serial (FTDI) adapter or a USB-TTL converter to upload code via the Arduino IDE. Simply connect the adapter to the board's serial pins (TX, RX, GND, VCC, and DTR/RST) and select "Arduino Pro or Pro Mini" in the IDE.
Q: Is the Pro Mini ATMEGA328P fully compatible with the Arduino IDE and standard libraries?
A: Yes. The board uses the same ATmega328P chip as the Arduino Uno and is fully compatible with the Arduino IDE. Simply select "Arduino Pro or Pro Mini" with the correct processor (ATmega328P) and matching voltage/speed configuration when uploading your sketches.
Q: How many analog input pins does this board have?
A: The Pro Mini ATMEGA328P features analog input pins A0 through A7 (8 analog inputs), giving you plenty of connections for sensors, potentiometers, and other analog devices.