Welcome to SolderBit
An independent engineering blog covering embedded systems, PCB design, RF communications, and semiconductor physics — built on real projects, not theory alone.
Every article comes from something that was actually built, debugged, and shipped. No filler, no padding.
📢 Site News
Jun 14, 2026 Engineering Tools page launched — 8 free calculators for LoRa link budget, PCB trace width, SysTick, PWM, RC filter, LED resistor, voltage divider, and resistor color code.
Jun 13, 2026 Related articles now appear at the bottom of every post — find more content on the same topic without going back to the blog listing.
Jun 12, 2026 Search powered by Pagefind added — find any article instantly.
Jun 11, 2026 Comments now available on all articles via Giscus — sign in with GitHub to join the discussion.
🔌 Electronics News
Jul 4, 2026 Microdistillery for Microchemistry
Jul 3, 2026 A New Twist on the To Do List
Jul 3, 2026 This KVM runs a P4 instead of a Pi.
Latest Articles
(5 most recent — view all)
— A first-principles look at how SPR biosensors detect molecules by watching a resonance dip move, and what it would actually take to build one on a bench.
— What metamaterials actually are, why they break normal electromagnetic rules, and how engineers simulate and design them in practice.
— Step by step guide to designing a custom PCB for the ESP-12F WiFi module in KiCad. Covers schematic, footprint, layout, and common mistakes.
— A practical explanation of PID control using a self-balancing robot as the example. Covers proportional, integral, and derivative terms with real tuning experience.
— A practical guide to running FreeRTOS on the TM4C123 microcontroller. Covers task creation, queues for inter-task communication, and semaphores for synchronization.
Topics Covered
- Embedded firmware — FreeRTOS, bare-metal, communication protocols
- PCB design and layout walkthroughs in KiCad
- LoRa and RF communication systems
- Semiconductor device simulation
- Electronics theory with practical context