OSOYOO Universal IO Breakout Board – GPIO Expansion & Debugging Platform for Arduino Nano, ESP32, ESP8266 NodeMCU, Raspberry Pi

The OSOYOO Universal IO Breakout Board is a versatile GPIO expansion and debugging platform compatible with Arduino Nano, 30pin or 38 pin ESP32, ESP8266 NodeMCU, Raspberry Pi Pico, and other MCUs (0.6–1.2 inch pin spacing, 2.54 mm pitch). Every GPIO has a dedicated LED driven by a 74LVC14AD inverter — no load on MCU pins, no interference with ADC or I²C. Two independent VA/VB rails (JW5357 DC-DC, 3 A each, 3.3/5 V selectable) with reverse polarity protection, power switch, barrel jack, and screw terminals provide a complete power solution.

🔌 Universal MCU Compatibility

Supports virtually all development boards with 2.54mm pin pitch and 0.6–1.2 inch row spacing, including Arduino Nano, 30p or 38p ESP32, ESP8266 NodeMCU, Raspberry Pi Pico, and more. Two 2×24P female sockets accept up to 48 pins.

💡 Real-Time Per-Pin LED Indicators

Each GPIO has a dedicated LED that lights up when the pin is HIGH and turns off when LOW. Ideal for visual debugging without a logic analyzer. Floating pins may dimly light the LED to help identify unconfigured IOs.

⚡ Dual Independent Power Rails (VA & VB)

Two JW5357 step-down DC-DC converters deliver up to 3A per rail, independently selectable for 3.3V or 5V. Perfect for powering sensors, servos, and actuators separately from the MCU.

🛡️ Non-Intrusive LED Drive Circuit

LEDs are driven by a 74LVC14AD Schmitt-trigger inverter, not directly from GPIO. This means zero load on MCU pins, no interference with ADC accuracy, I²C/SPI buses, or ESP32 strapping pins during boot.

🔧 Dual Connection Options + Protection

Each signal row provides both 2.54mm pin headers and screw terminals (S/V/G) for easy, tool-free wiring. Built-in SI2302 reverse polarity protection, on/off switch, and 7–18V DC input (barrel jack or terminal) ensure safe and flexible operation.