Tried to visualise EM simulation output in 2D using BVTK nodes. I've simulated the voltage step using openEMS

The software to create the black hole in the movie 'Interstellar' is a full implementation of Einstein's equations in 40,000 lines of C++, and rendered thousands of 23-megapixel IMAX frames on a 32,000-core render farm at about 20 core-hours per frame: arxiv.org/pdf/1502.03808…

Made a square version of the 902-928 MHz antenna. The square patch is smaller than the round one for the same frequency. After optimizing the match the BW seems larger on the square patch.

It works😁

I'm working, I'm working! Writing a bazillion unit tests for our new standalone HW accelerated linear algebra library for the Sega Dreamcast's SH4 based on the work I've done optimizing the physics, collision, and rendering math for our Grand Theft Auto 3 and Vice City DC ports.

working on a quick spectrum analyzer that runs on a nRF62840/SX1262 board.

New video: Iron nitride permanent magnets made with DIY ball mill and tested with DIY magnetometer youtube.com/watch?v=M6XIgd…

🚀 Major openFPGALoader update: SpiOverJTAG rewritten for AMD Embedded FPGAs: now supports Flash programming in large JTAG chains. Next: testing with all Xilinx FPGAs + adding support for EfinixInc & Altera! Big thanks to Enjoy Digital & amarisoft for funding! 🥂

Another MZI with a ring on each arm, this time for decoupling amplitude and phase modulation

I substantially improved my kicad buck converter generator. It now also searches over parallel resistors for the feedback divider, and has way more features and warnings about potentially dubious configurations. As always, just hit "copy to clipboard" then paste right into kicad!

みんな大好き CISCO GLC-SX-MM （850 nm）でも動いた。ホイップアンテナで受けたFM電波をそのままSFPに突っ込むという乱暴な構成でも動くんやな..... #kingyolab

GPSアンテナからの信号をSFPに突っ込んでみた。問題なく伝送できてるな・・・

Predicted Sun noise = 6.35dB Measured Sun noise = 6.4dB

Design of this food box and eating aid

The single most undervalued fact of linear algebra: matrices are graphs, and graphs are matrices. Encoding matrices as graphs is a cheat code, making complex behavior simple to study. Let me show you how!

Another RF demonstration board: Siglent SNA-TB01

本日発売のトラ技8月号の連載記事でいよいよ位相差測定器の作り方を解説します。読者プレゼントとして基板を4名様に頒布します。専門性の高い用途ではありますが、90°移相回路の製作や調整に役に立ちますので是非ご応募ください。リサージュ図形では難しい1°以下の位相差を測定できます。

Anyone else store PCBs like this? Using a credit card booklet

A fun afternoon looking at the Exostiv Labs high speed probe, it uses the Gigabit Transceivers to provide a ILA type debugging only at up to 65 Gbps. I decided to invest in one after seeing them at DAC, it will be very useful for image processing applications.