https://vivaanshah.tech/blog The personal technology brand of Vivaan Shah — software, electronics, embedded systems, robotics and AI. Explore projects, products and engineering logs. en https://vivaanshah.tech/blog/building-vivaanshah-tech https://vivaanshah.tech/blog/building-vivaanshah-tech How vivaanshah.tech is built: Astro 5 static output on Cloudflare Pages, a dependency-free motion engine, seeded generative circuit art, and a CSP with no unsafe-inline. Devlog Mon, 08 Jun 2026 00:00:00 GMT https://vivaanshah.tech/blog/taming-stepper-resonance https://vivaanshah.tech/blog/taming-stepper-resonance Why my robotic arm sang like a violin at 400 mm/min, and how StealthChop, microstepping and a firmware notch filter fixed it. Engineering Sat, 14 Mar 2026 00:00:00 GMT https://vivaanshah.tech/blog/esp32-realtime-web-ui https://vivaanshah.tech/blog/esp32-realtime-web-ui WebSockets over LittleFS with gzip-baked assets: how Helios pushes LED state to four browsers at once with ~11 ms median latency on a $4 microcontroller. Tutorial Mon, 09 Feb 2026 00:00:00 GMT https://vivaanshah.tech/blog/atlas-devlog-cycloidal https://vivaanshah.tech/blog/atlas-devlog-cycloidal Replacing the shoulder joint's printed spur gearbox with a printed cycloidal drive: eccentric bearing, BB-loaded race, torque tests, and a 10x backlash improvement measured with a dial indicator. Devlog Sun, 18 Jan 2026 00:00:00 GMT https://vivaanshah.tech/blog/oled-ui-patterns https://vivaanshah.tech/blog/oled-ui-patterns The five interface patterns I keep reusing on SSD1306 displays: status bars, rotary menus with inertia, toasts, sparklines, and transitions — all inside 8KB of flash. Tutorial Tue, 09 Dec 2025 00:00:00 GMT https://vivaanshah.tech/blog/first-pcb-lessons https://vivaanshah.tech/blog/first-pcb-lessons What two respins of my macropad board taught me about footprints, decoupling, USB routing, and why 0402 passives were a mistake I made on purpose and regretted. Engineering Tue, 18 Nov 2025 00:00:00 GMT