Circuits & Electronics
DC analysis, AC theory, op-amp design, filter synthesis, SPICE simulation, and PCB bring-up notes from real lab benches.
Open categoryThe Elektro Krishna Knowledge Map
A categorized index of every subject we publish on — from Ohm's law and three-phase networks to STM32 registers and Python test harnesses. Pick a thread, follow it end to end.
Four Pillars
Browse by Engineering Domain
Each domain collects foundational theory, hands-on projects, and reference notes — written for working engineers and serious students, not content farms. Hover any card to peek inside.
Power Systems
Three-phase fundamentals, transformer vector groups, protection relays, load flow, and renewable integration for the modern grid.
Open categoryEmbedded & Firmware
STM32, ESP32, AVR register deep-dives, peripheral drivers, FreeRTOS patterns, and reproducible build pipelines for serious firmware.
Open categoryCode & Tooling
Python for test automation, C idioms for hardware, CMake, Git workflows, and the small CLI utilities that keep an engineering day sane.
Open categoryMeasurement & Instrumentation
How to trust your oscilloscope, current shunt math, probe compensation, and writing measurement procedures that pass review.
Open categoryControl & Signal Processing
PID tuning without tears, Bode plots by hand, FFT pitfalls, state-space intuition, and motor control loops on real hardware.
Open categoryTrending This Quarter
Most-Read Topics
The threads our readers keep coming back to. Sorted by unique visits, not vanity metrics.
STM32 clock tree configuration
· 18.4k reads
Op-amp stability & compensation
· 14.1k reads
Transformer vector groups explained
· 12.7k reads
Python + PyVISA for instrument control
· 11.3k reads
FreeRTOS task priorities done right
· 10.9k reads
Oscilloscope probe compensation
· 9.6k reads
PID tuning without the guesswork
· 9.2k reads
RC filter design in 10 minutes
· 8.8k reads
ESP32 low-power Wi-Fi patterns
· 8.1k reads
Suggested Pathways
Where to Start, Depending on Your Goal
No single reading order fits everyone. These three curated threads take you from wherever you are to a working outcome — and tell you which articles to skip if time is short.
PATHWAY 01
First-Year EE, Done Properly
For students who want intuition before notation. Builds a working mental model of voltage, current, and impedance without the usual hand-waving.
- What voltage actually is
- Ohm's law as a tool, not a fact
- Phasors, the friendly version
- Your first SPICE simulation
PATHWAY 02
Embedded Engineer in 90 Days
For software engineers crossing into firmware — or students who learned Arduino and want the register-level version. Assumes basic C, no hardware background.
- GPIO, but really
- UART without a library
- Timers, interrupts, and you
- FreeRTOS when you outgrow super-loop
PATHWAY 03
Power Systems, Practiced
For utility engineers, plant electricians, and renewables folks. Practical reading that pairs textbook diagrams with what you actually see in a substation.
- Reading a single-line diagram
- Protection relay coordination
- Power factor correction by hand
- Solar inverter anti-islanding
Keep Mapping the Territory
The topic index grows roughly every fortnight. The fastest way to stay current is the article feed — short, technical, no fluff — plus the resources shelf for long-form reference material.
Read the Article Feed