Big Clive bridges solar light corrosion with custom OpenSCAD adapters

Prerequisites and Hardware Tools

To follow this build, you should be comfortable with basic soldering and have access to a 3D printer. You will need a soldering iron, leaded solder, desoldering wick, and liquid flux. For the 3D printing portion, familiarity with OpenSCAD is helpful but not mandatory, as we will use the Customizer feature to adjust parameters without rewriting the core logic.

Key Libraries and Tools

• OpenSCAD: A script-based 3D modeler that uses code to define geometry.
• Slicer Software: (e.g., Cura or PrusaSlicer) to convert STL files into G-code for your printer.
• Digital Calipers: Essential for measuring the diameter of your solar light posts.

Code Walkthrough: The Vertical Mounting Script

This OpenSCAD script generates a custom adapter base. The logic uses difference() to subtract hollow areas and screw holes from a solid union() of the base and collar.

// Solar light post top base
dia=18; // diameter of solar insert
depth=16; // depth of collar
screw=3.5; // screw hole diameter
$fn=100; // circle facets for smoothness

difference(){ union(){ cylinder(h=2,d=dia+22); // The flat base plate cylinder(h=depth,d=dia+2); // The vertical collar translate([0,0,2]) // Adds a reinforcing fillet cylinder(h=2,d1=dia+6,d2=dia+2); } translate([0,0,-1]) cylinder(h=depth+2,d=dia); // Hollows the center

// Screw hole subtraction translate([-((dia /2)+7),0,-1]) cylinder(h=4,d=screw); translate([(dia/2)+7,0,-1]) cylinder(h=4,d=screw); }

## Syntax Notes and Practical Examples
The `$fn` variable controls the resolution of your cylinders; 100 is a sweet spot for smooth curves without slowing down the render. The `difference()` function is the workhorse here—it takes the first object and subtracts all subsequent objects from it. This is perfect for creating precisely sized screw holes and hollow inserts. Beyond garden lights, you can scale the `dia` and `depth` variables to create custom pen holders or tool mounts.

## Tips and Hardware Gotchas
When modifying the electronics, the internal switch is your biggest enemy. It will inevitably rust. Bridge the contacts with solder to keep the light permanently "on." To prevent corrosion on the circuit board, apply a layer of [Vaseline](entity://products/Vaseline) or spray-on lacquer. When 3D printing the bases, measure your light's diameter twice; 18mm is standard, but some variations exist. If your light is too loose, use a decimal like 18.5 in the script for a snugger fit.