Sam M

ElectroMag Nodes now available on BlenderMarket and Gumroad! Give it a go! I would appreciate any comments/feedback. Keep in mind that this is a first attempt at creating a basic electromagnetics solver in Blender, expect more features and nodes to be added blendermarket.com/products/elect… highvoltage.gumroad.com/l/electromagno… #geometrynodes #simulationnodes #b3d #blender3d #electromagnetics #engineers #engineering #electronics #science #physics #educational

@Jay966591328971 yes I'm using Coilcraft 2929SQ air core inductors to compare, inductance result is close enough within 10% the resistance calculation begins to diverge and become unstable at frequencies above 1MHz.

@samerps Has any of the data been cross referenced/checked to actual inductors for accuracy?

continuing with my PEEC solver in Blender for inductors. Now I have a basic Python/Numba code that can calculate skin and proximity. You can see as the frequency increases the current shifts towards to the outer surface and also gets affected by adjacent turns #b3d #geometrynodes #electronics #Technology #science

@KritischerP Thank you

@samerps I'll be looking forward to that Sam.

working on creating a PEEC (partial element equivalent circuit) solver, instant calculation of inductance. Geometry nodes are becoming more and more powerful. This will be included in Electromag Nodes. #b3d #geometrynodes #electronics #technology #Science

@Jay966591328971 Through Blender

@samerps Pretty cool. Is/will this be a stand alone or only through that 3D engine?

@seekage_ solving Neumanns Integrals, also compared result with FastHenry

@samerps This does not look accurate, are you using a lot of approximations?

@jaisoddj cool!

In the initial video, we see the effects of high frequency motion of electrical charges on electric and magnetic fields. Here, the particles is moving up and down at 1THz. The consequence is high derivatives of electric fields with respect to time, thereby generating proportionate magnetic fields whose fluctuations feedback into those electric fields. This is called back EMF. I ran it through a sim, and found something interesting. What happens when I lower the relative permeability of free space to 1e-7? We can see the effect in the video. As you can see, back emf is obsoleted! This is to be expected for two reasons. Absolute permeability multiplies by current density and changing E fields in maxwells equation for the curl of the resultant B field, from changing charge position and magnitude of charge, and changing electric field magnitude with respect to time. So, lower absolute permeabilities imply lower B curls, and lower B curls with respect to time, imply lower feedback into the electric fields. So, let it be known, to get rid of back EMF, all we need is an environment of low permeability, permittivity or both. In the image below, in the first example, I provide a current pointing away from the viewer(X circle) and the resultant B field. In the second example, I provide the same setup, except I add a mu Near zero (MNZ) meta material which effectuates a space with 0 permeability at the right frequency. We see the effect on the magnetic field here. The meta material pushes the magnetic field further away from the current. There is a second block, closer to the current. This may represent bismuth, or any material with lower permeability than the surrounding material, such as air. The meta material and bismuth make sure that the magnetic field pushes away, rather than closer to the current. Now, the change of this curl of this B field with respect to time is proportionate to the back EMF. Keep in mind, the B field is now, partially, further away. So, I end up reducing the back EMF, to the extent I move the B field away from the central current. Ideally, wide surface area meta materials, for maximum B field displacement, will lead to the greatest reduction in back EMF.

@O34760958 Check ElectroMag Nodes

@samerps Never thought Blender could calculate inductance...

@0xLangleySoryu native geometry nodes

@samerps wtf is this blender geometry nodes natively or an extension?

@KritischerP it will be able to calculate coupling between arbitrary coils, will be a free update to Electromag Nodes superhivemarket.com/products/elect…

@samerps You just popped up on my feed. The algorithm is getting better, but I lack some prior context. Does it compute coupling between arbitrary coil geometries? Will there be a GitHub repo? Cost? Patreon? I am compelled to

@Jay966591328971 for now air core, but will be including magnetic materials

@samerps Is this just for open core, or can this do others?

@Marc_Compere Yes, will be a free update toElectromag Nodes, superhivemarket.com/products/elect…

@samerps are magnetic fields included in this? there aren’t many B-field solvers and visualization tools 🤔

@deeperflows @TheAmpHour @Blender @eevblog Thanks!

I finally made on it on the @TheAmpHour podcast! Many thanks to Chris Gammell for having me on podcast, please check it out if you want to learn about all things @Blender and how I use it for modelling and visualisations in engineering. @eevblog #b3d #blender3d #engineering #science #3dart #3danimations

bending tall electrolytic capacitors to reduce total thickness and creating a compact design #b3d #geometrynodes #kicad #3dart

Kicad can export layout and individual nets as STL files, which can then be imported in #b3d with the new Import STL node. You can either import the entire geometry or selected specific nets by typing their name. The imported geometry can then be scaled up to view a net of interest in more details like this pcb planar transformer design #geometrynodes #electronics #Engineering #3dart #3DModel #kicad

I'm experimenting with the new features in both #kicad and Blender for exporting and importing geometry. KiCAD now allows you to filter and export selected nets from the PCB as STL or STEP files, and Blender now has new import STL nodes in geometry nodes, which means you can select the nets that you want to visualise with having to import the entire geometry. #b3d #geometrynodes #electronics #Engineering

back to rendering PCBs and playing with geometry nodes! I'm using the the new import STL nodes to quick export selected nets from kicad into blender #b3d #kicad #pcbdesign #electronics #engineering

Blender 5.0 will come with support for volume grids in #GeometryNodes. There is a new blog post about it: code.blender.org/2025/10/volume… #b3d #devfund

@xenosagaX2 demo file now updated

@samerps Thanks! Looking forward to it💪

simulating layouts with Blender FastHenry! you can now export spice netlist of your Blender scene and run a layout spice simulation. Here I am using kiCAD Ngspice to see study the switch node voltage ringing of NMOS half-bridge with TO-220 packages. You can see how moving DC link capacitors closer, and shortening leads reduces the amount of ringing and overshoot. @Blender @kicad_pcb @DanielBogdanoff @eevblog

@xenosagaX2 Hi, thanks for testing, the demo file is out of date, I will create a new one and upload it soon

@samerps Hey Sam! Nice video and great enhancement. I tried running one of the demo file included in your repo but when I tried to 'Run All' following the sample video mentioned in github, I experienced a unique id error not found? I'm running on Blender 4.4.1. What's causing this?