Tag: kicad

4 articles tagged kicad. See all tags or all posts.

A Naive Comparator: Two NPNs, One PNP, and a SPICE Simulation to Prove It

electronics analog transistors comparator differential-pair adc spice ngspice kicad skidl simulation

A follow-up to my flash-ADC Instagram video: how NPN and PNP transistors work, how a differential pair built from two 2N3904 and a 2N3906 output stage turns into a comparator, and what the ngspice simulation in the accompanying repo shows plot by plot.

open.cob.json: One File Between the Chip Designer and the PCB Designer

electronics asic kicad open-source engineering chip-on-board

For years I kept my chip-on-board bonding notes in private JSON files. A conversation with wafer.space made me publish them as a format. This is the story of the decisions that were hardest to make: none versus unspecified, why pad shapes are their own files, and what a real padframe taught the parser.

KiCon Europe 2026: Trip Report without the Trip

kicad conferences open-source pcb bochum skunkforce

Three days of KiCon Europe 2026 at Gleis 9 in Bochum from the organiser's chair: KiCad 11 previews from Wayne Stambaugh, ngspice 47, open source test rigs, rigid-flex in space, a browser KiCad I am not sold on, and Seth Hillbrand's eight-hour training. Plus what changes for 2027.

KiCon 2019: A Brief Trip Report

kicad conferences open-source pcb chicago

Chicago, April 2019: the first KiCon ever, organised by Chris Gammell at mHub. A week of hackerspaces, breakfast burritos, KiCad workshops and the moment the idea of a KiCon in Germany was born. Republished unchanged from my old Blogspot.

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