Pro Mini ATMEGA328P 3.3V/8MHz Development Board - Arduino Compatible
Pro Mini ATMEGA328P 3.3V/8MHz Development Board
The Pro Mini ATMEGA328P 3.3V/8MHz Development Board is a compact, breadboard-friendly Arduino‑compatible board designed for low‑power and space‑constrained projects. Based on the ATmega328P microcontroller, it operates at 3.3V logic, making it ideal for battery‑operated gadgets and wearables. Its tiny footprint lets you embed it directly into your final prototype.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ATmega328P |
| Clock Speed | 8 MHz |
| Operating Voltage | 3.3V |
| Memory | 32 KB Flash (0.5 KB bootloader), 2 KB SRAM, 1 KB EEPROM |
| I/O Pins | 14 digital (6 PWM), 6 analog |
| Dimensions | 33 mm x 18 mm |
What You Can Build With This
- Battery‑powered weather station with wireless data upload
- Wearable fitness tracker collecting motion and heart‑rate data
- Wireless sensor network node using nRF24L01 for home automation
- Autonomous mini robot with obstacle avoidance and Bluetooth control
Compatibility
This board works perfectly with the Arduino IDE. Select Tools > Board > Arduino Pro or Pro Mini, then choose the ‘ATmega328P (3.3V, 8 MHz)’ variant. It pairs seamlessly with 3.3V sensors and modules such as HC‑05 Bluetooth, nRF24L01 radios, and 0.96″ OLED displays. You’ll need an external USB‑to‑serial converter (like an FTDI breakout) to upload sketches.
Wiring Notes
Connect your FTDI programmer: VCC to VCC, GND to GND, TX to RX, RX to TX, and DTR to the RST pin via a 0.1 µF capacitor for auto‑reset. The onboard 3.3V regulator accepts 3.35–12V on the RAW pin. Never exceed 3.3V on any I/O pin; use level shifters if you must interface 5V logic.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with the Arduino Uno?
Yes, the ATmega328P is the same microcontroller used on the Uno. In the Arduino IDE, select “Arduino Pro or Pro Mini (3.3V, 8 MHz)” and all standard functions will work. The only difference is the lower operating voltage and absence of a USB port.
Does it have a built‑in USB port?
No, the Pro Mini omits the USB‑to‑serial circuitry to save space. You’ll need an external FTDI‑based USB‑to‑TTL adapter to upload your code.
Can I use 5V sensors with this board?
Direct connection to 5V sensors is not recommended. Use a 4‑channel logic level converter or choose sensors designed for 3.3V operation to avoid damaging the board.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items