Keyes 5.1 Arduino Prototype Expansion Shield (Proto Shield Board)

An electronics hobbyist prototyping shield expansion board designed specifically for Arduino ecosystem microcontrollers (compatible with Arduino UNO R3, Duemilanove, and Leonardo form factors). This board allows makers and developers to build clean, custom circuits, test sensors, or solder permanent miniature hardware layouts right on top of their microcontrollers without dealing with loose jumper wires. Brand: Keyes Model/Revision: 5.1 Form Factor: Standard Arduino Shield layout (2.54mm pin pitch) Integrated Support Interfaces: Features pre-configured printed solder pads matching common legacy displays including the Nokia 5110 screen interface and LCM 1602 LCD modules, alongside a dedicated SPI breakout section. Onboard Components: * Dual tactile push-buttons (including a hardware Reset button and a programmable Test button). Built-in prototyping through-hole grid matrix for custom component placement. Integrated placement zones for capacitors, resistors, a 10K potentiometer layout, and status LEDs. Condition: Pre-owned, clean board face. Features stackable header pins already soldered along the edges for easy plug-and-play stacking.