https://isaklab.com/en/enNotes on cryptography, radio, and embedded systems.Sun, 14 Jun 2026 01:44:06 +0000https://isaklab.com/en/posts/avr-firmware-without-hardware/https://isaklab.com/en/posts/avr-firmware-without-hardware/Sun, 14 Jun 2026 12:00:00 +0000Two problems on the AVR toolchain — simulating peripherals to develop without a board, and emitting correct code per core.https://isaklab.com/en/posts/tern/https://isaklab.com/en/posts/tern/Sat, 13 Jun 2026 12:00:00 +0000An HF weak-signal mode with a channel-aware receiver — what it has to model to decode a signal buried in a fading shortwave path.https://isaklab.com/en/posts/colophon/https://isaklab.com/en/posts/colophon/Sat, 13 Jun 2026 12:00:00 +0000Why this site is a few hundred lines of Python that emit plain HTML, and nothing else.https://isaklab.com/en/posts/avr-compiler-from-scratch/https://isaklab.com/en/posts/avr-compiler-from-scratch/Sun, 07 Jun 2026 12:00:00 +0000The first decisions in ik8b — explicit storage, register allocation, and a standard library with no C runtime.https://isaklab.com/en/posts/cdss-receiver/https://isaklab.com/en/posts/cdss-receiver/Fri, 15 May 2026 12:00:00 +0000Building the receiver side of a DSSS modem — timing recovery, carrier-frequency offset, and phase tracking that holds across a frame.https://isaklab.com/en/posts/iklab/https://isaklab.com/en/posts/iklab/Fri, 03 Apr 2026 12:00:00 +0000A planning-first command-line coding agent on Granite 4.0 — tools, user-defined skills, and the machinery a long session needs.https://isaklab.com/en/posts/e2hat/https://isaklab.com/en/posts/e2hat/Mon, 23 Mar 2026 12:00:00 +0000An end-to-end encrypted chat on elliptic curves, and the security work the first release didn't cover.https://isaklab.com/en/posts/ecutils-v2/https://isaklab.com/en/posts/ecutils-v2/Sat, 21 Mar 2026 12:00:00 +0000Turning an elliptic-curve library into something verifiable — a new Point API, curve validation, and cross-checks against reference implementations.https://isaklab.com/en/posts/radioplanbr/https://isaklab.com/en/posts/radioplanbr/Fri, 13 Mar 2026 12:00:00 +0000A browser tool for amateur RF planning — propagation models, real-time ionospheric data, and antenna patterns on a map.https://isaklab.com/en/posts/sdrconnect/https://isaklab.com/en/posts/sdrconnect/Thu, 07 Aug 2025 12:00:00 +0000A small library for SDR connectivity and raw IQ capture, with analysis to see what was actually received.https://isaklab.com/en/posts/avr-modular-system/https://isaklab.com/en/posts/avr-modular-system/Wed, 29 May 2024 12:00:00 +0000A C library of AVR peripheral drivers — I2C, SPI, and displays, with modules and protocols kept separate.