RAMPS 1.5 control panel — a stackable driver/expansion board for 3D printers and CNC machines that connects directly to an Arduino MEGA 2560. Key benefits and problem solving Reliable, stackable connection: designed to stack onto the MEGA 2560 control board for a simple, compact integration with existing systems. Improved MOSFET reliability: replaces the problematic plug-in MOS tube design with a fixed/patch MOSFET arrangement to eliminate loose connections and reduce failure risk. Modular upgrade path: functions as a Ramps 1.5 base while remaining compatible with Ramps 1.4 control modules, enabling straightforward upgrades or expansions without a full controller replacement. Easy maintenance and modification: the plate pin base is designed to be easily removed or replaced, simplifying repairs and future design changes. What it does (function) Serves as the primary driver/expansion board for 3D printers and small CNC machines, providing the interface and connections needed to control motors, heaters, and peripherals when paired with the MEGA 2560. Compatibility Directly compatible with Arduino MEGA 2560 (stacks onto the MEGA board). Works with Ramps 1.4 control modules and serves as an upgrade base to Ramps 1.4 systems. Suitable for typical 3D printer setups and light CNC machine control applications. Design and practical attributes PCB-based control/expansion board designed for stacking and compact assembly. Plate pin base designed for quick removal or replacement to support redesigns and repairs. Uses fixed/patched MOSFETs instead of plug-in MOS tubes to improve electrical contact stability and long-term reliability. Typical use scenarios Upgrading an older Ramps 1.4-based 3D printer to the Ramps 1.5 layout while keeping the MEGA 2560 controller. Building or repairing a DIY 3D printer where a stackable, modular driver board is required for compact assembly. Expanding control for a small CNC machine that uses Arduino-compatible electronics and needs a reliable MOSFET implementation. Why choose this board Straightforward physical compatibility with MEGA 2560 and Ramps 1.4 modules makes integration and upgrades quick. The revised MOSFET approach addresses a common failure point in plug-in designs, improving durability. Modular plate pin base supports future modifications and easier servicing. Includes RAMPS 1.5 control/expansion board configured for stacking on MEGA 2560 and compatible with Ramps 1.4 modules. Note: Functions and compatibility are based on the RAMPS 1.5 design for use with MEGA 2560 and Ramps 1.4 control modules as described.