Development Boards

Microcontrollers and development boards are the core brains behind any IoT innovation, robotics, and STEM project. Whether you need a classic Arduino Uno R3 for educational prototyping or a dual-core ESP32 for smart home connectivity, we have the right hardware for your build. Backed by 20 years of electronic retail experience in Sham Shui Po, our technical team provides on-site component matching and ready-stock availability to keep your engineering projects moving without delay.

How to Choose the Right Microcontroller Board

Selecting the correct development board depends heavily on your project's processing needs, power constraints, and connectivity requirements. Here is a technical breakdown of our core offerings:

Board Series Core Processor & Logic Voltage Best Use Case Wireless Connectivity
Arduino Uno R3 8-bit AVR (5V Logic) Beginner STEM education, basic motor control, and sensor reading. None (Requires external shield)
Arduino Uno R4 WiFi 32-bit ARM Cortex-M4 (5V Logic) Advanced hardware processing, LED matrix displays, and fast calculations. Built-in Wi-Fi & Bluetooth
ESP32 Series 32-bit Dual-Core (3.3V Logic) IoT applications, smart home integration, and low-power sensor nodes. Built-in Wi-Fi & BLE

Important Note (Hardware Limitation & Burn Hazard): Pay strict attention to the logic voltage levels. The classic Arduino Uno operates on 5V logic, whereas the ESP32 is strictly a 3.3V device. Sending a 5V sensor signal directly into an ESP32 GPIO pin will instantly fry the microcontroller. Always use a Logic Level Converter when interfacing 5V peripherals with 3.3V boards.

Frequently Asked Questions (FAQ)

Q: Can I run my existing Arduino code (sketches) on an ESP32 board?
A: Yes, you can program the ESP32 using the Arduino IDE by installing the ESP32 board manager. However, because the hardware architecture and GPIO pinouts are completely different, you must remap the pin numbers in your code. Some hardware-specific Arduino libraries may also require ESP32-compatible alternatives.

Q: Which board is best for a battery-powered outdoor IoT project?
A: The ESP32 or ESP8266 is highly recommended due to their "Deep Sleep" modes, which consume only microamps (µA) of power, allowing a battery to last for months. Standard Arduino Uno boards are terrible for battery projects because their always-on power LEDs and inefficient linear voltage regulators will drain a battery in days.