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Hardware & CAD Suite

3D Printing, Electronics & Hardware Maker Hub

Watertight STL repair, G-code path diagnostics, battery pack sizing, and e-paper dithering.

100% In-Browser Execution Zero Cloud Storage / Private

Included In-Browser Utilities (8)

No Install Required

3D STL Mesh Non-Manifold Hole Closer & Watertight Cap Repairer

Inspect 3D STL triangle meshes, detect open boundary edges and non-manifold holes, and auto-cap missing face triangles client-side to generate verified watertight binary STL files for Cura, PrusaSlicer, or Bambu Studio.

#stl hole closer online#repair broken stl mesh#watertight stl fixer

3D Printer G-Code Layer & Retraction Travel Path Analyzer

Inspect raw 3D printer .gcode files directly in your browser. Highlights filament retractions, unretractions, and fast non-print travel moves (G0) to diagnose stringing, oozing, and seam defects without heavy desktop slicers.

#gcode visualizer online#3d printer travel move analyzer#gcode retraction viewer

3D Printable Photo-to-Lithophane Relief STL Generator

Convert photos into 3D printable binary .stl lithophanes for Bambu Lab, Creality, and Prusa 3D printers. Dark areas print thick and light areas print thin so the photo magically appears when backlit by a lamp.

#lithophane stl generator free#3d print photo lithophane#bambu lab lithophane maker

Lithium 18650 / 21700 S/P Battery Pack Balancer & Busbar Sizer

Design custom Series-Parallel (S/P) battery packs for DIY e-bikes, robotics, and solar storage. Computes nominal and peak pack voltages, total Watt-hours, continuous discharge ampacity, and pure nickel strip vs copper busbar gauge.

#18650 battery pack calculator#21700 series parallel calculator#battery busbar ampacity calculator

Eurorack 1V/Octave CV Voltage Divider & Attenuator

Calculate exact resistor voltage divider networks (E24 1% tolerance) to step down modular synthesizer control voltages (10V to 3.3V/5V) with 1V/Octave semitone quantization and real-time Web Audio pitch synthesis.

#eurorack cv voltage divider calculator#1v per octave note voltage chart#modular synth attenuator e24

Multi-Color E-Paper 7-Color Dither & Byte Array Engine

Convert color photos for Waveshare 7-Color ACeP (Spectra 6) and 3-color BWR e-Paper displays using custom Floyd-Steinberg and Atkinson error diffusion. Exports ready-to-flash C hex byte arrays for Arduino and ESP32 display drivers.

#epaper 7 color dithering online#waveshare acep spectra 6 dither#e ink 7 color image converter

Photovoltaic Solar Panel Angle & Inter-Row Shading Obstruction Simulator

Calculate exact minimum row-to-row spacing distance (D) to prevent front solar panel rows from casting shadows onto back rows during the critical winter solstice at 9 AM – 3 PM.

#solar panel row spacing calculator#photovoltaic inter row shading#winter solstice shadow length solar

Lens Depth of Field & Bokeh Blur Circle Simulator

Simulate optical Depth of Field (DoF), near and far sharp limits, hyperfocal distance, and background bokeh circle-of-confusion diameter across Full Frame, APS-C, Super 35, and Medium Format camera sensors with real-time ray diagrams.

#depth of field calculator online#bokeh blur circle diameter simulator#hyperfocal distance lens calculator

The Complete 3D Printing & Embedded Electronics Workflow

3D slicers like Cura, PrusaSlicer, and Bambu Studio require strictly manifold geometry. Missing polygons cause infill voids. Our STL Mesh Hole Closer scans and fan-caps open boundary loops client-side.

For battery builders, connecting cylindrical 18650 or 21700 cells requires calculating busbar ampacity to prevent thermal fires. Our pack balancer sizes pure nickel strip layers for your target load.

For embedded displays, multi-color e-Paper screens lack true color rendering. Our dithering engine produces optimal Atkinson and Floyd-Steinberg diffusion maps with ready-to-flash C hex byte arrays.

Frequently Asked Questions

Why should I repair non-manifold STL meshes before slicing?▼

When an STL file contains unclosed boundary holes, slicing engines cannot reliably distinguish inside volume from outside space, leading to missing layers, stringing, or slicer crashes.

How many nickel strip layers do I need for my battery pack?▼

Standard 0.15mm × 8mm pure nickel strips safely carry 5A continuous. For a 30A pack, you should spot-weld at least 6 parallel layers or switch to a copper-nickel sandwich busbar.