# schmitt trigger > Personal site of TA2PIL — aerospace, robotics, Unity3D, FPV and embedded electronics projects, with write-ups. Public Ghost content for AI and LLM tooling. This file includes a bounded export of public pages first, then recent public posts. Append `.md` to any post or page URL to get the content in Markdown (for example, `/example-post.md`). ## Pages ### About URL: https://hayri.me/about/ Last updated: 2026-07-25T19:10:02.000Z **TA2PIL.** Amateur radio operator based in Turkey. I build things that fly, roll, transmit and render — and this is where I write them down. ## What I work on - **Aerospace** — airframes, avionics, and the software that keeps them pointed the right way. - **Robotics** — actuators, sensing, and the control loops in between. - **Unity3D** — simulation, tooling and games. - **FPV** — building and flying. Mostly flying. - **Embedded & RF** — microcontrollers, radios, and the callsign that goes with them. ## Why “schmitt trigger” A Schmitt trigger is a comparator with hysteresis. Feed it a noisy, wandering signal and it hands back a clean edge — because it refuses to change its mind until the input has properly committed. Good circuit. Better habit. ## Get in touch Easiest route is [@vaizaragorn](https://x.com/vaizaragorn?ref=hayri.me) on X. --- *This page was scaffolded when the site was built — edit it in Ghost admin to make it properly yours.* ## Posts ### Example project — replace this with your first build URL: https://hayri.me/projects/example-project/ Last updated: 2026-07-25T19:09:39.000Z *This is a placeholder so you can see how a project entry looks. Replace the text, add a feature image, and it becomes a real portfolio entry. Delete it once you have a few of your own.* ## The problem What were you trying to do, and why was it not straightforward? One or two paragraphs is plenty. ## Approach The interesting decisions — what you picked, what you rejected, and why. ## Hardware / stack - Airframe / chassis / platform - Controller and firmware - Sensors, radios, link budget - Anything you would call out to someone rebuilding it ## What broke The most valuable section. Failures are the part nobody else writes up. ## What I would change Close it out with the honest retrospective. --- ### How to add your own Write a normal post in Ghost admin and give it the internal tag `#project`. That single tag moves it out of the blog feed and into [/projects/](https://hayri.me/projects/) automatically — no code or config changes needed. ### Starting a build log URL: https://hayri.me/starting-a-build-log/ Last updated: 2026-07-25T19:09:38.000Z New site, new habit: writing things down while I build them instead of afterwards. Most of what I do happens in short bursts and then evaporates. The wiring diagram lives on the back of an envelope, the fix lives in my head, and six months later I am solving the same problem from scratch. This is the fix for that. ## What goes here - **Build logs** — what I made, what broke, and what I would do differently. - **Notes** — short findings that do not deserve a full write-up but should not be lost either. - **Projects** — the finished-enough things, collected on the [projects page](https://hayri.me/projects/). No schedule. It gets written when there is something worth writing about.