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LKLindy kellamsinembedded-engineering-toolkit.hashnode.dev·1d ago · 4 min read

STM32 Timer Frequency: Choosing PSC and ARR Without Guesswork

Why can a PWM output still be at the wrong frequency after you set both PSC and ARR? Usually the problem is an incorrect timer input clock or a missing “+1” in the register math—not a mysterious timer

YAYash Akbariincode-on-chip.hashnode.dev·Aug 25, 2025 · 37 min read

What Is Embedded C? And How It Differs from Desktop C

Chapter Outline Embarking on Your Embedded C Journey: Welcome! Why are we here? You’re ready to talk to tiny computers. What is "embedded" anyway? Think "hidden brains" inside things. Examples: washing machines, cars, fitness trackers, and...your...

ANAdithya ninrfid-tag.hashnode.dev·Aug 4, 2025 · 5 min read

Part 3 of my RFID system has got some cool features

Hello,If you’re new here, maybe look at Part 1 and Part 2 first, context matters. TL;DR — I built an RFID-based access system with NodeMCU + FastAPI. First it logged card taps. Then I added admin-only registration with JWT. And now? Now… I made it ...