Feeding a board clean, stable power.

Good power and grounding quietly decide whether a design is reliable. Most flaky boards trace back to these basics.

1. 1Linear vs switching regulatorsAn LDO burns the difference as heat; a switcher chops and stores it. Efficiency, noise, and how to decide which one a rail should use.1 min read·3 questions
2. 2Decoupling & bypass capacitorsWhy every IC needs a capacitor next to it, how placement and loop area decide whether it works, and what the 0.1 µF rule of thumb really means.1 min read·3 questions
3. 3Batteries, rails & power budgetsChemistry, capacity and discharge curves, plus how to build a power budget that survives peak current rather than only the average.1 min read·3 questions
4. 4Grounding, noise & EMIGround bounce, return paths and coupling. Why the return current matters as much as the signal, and how ground planes fix most of it.1 min read·2 questions