Notes
Research, learning and technical notes.
Button Input — Debounce & Pull-Up/Down Resistors
A complete guide to button input circuit design — pull-up and pull-down resistor principles, floating pin hazards, mechanical bounce, software and hardware debounce techniques, and fail-safe design practices for industrial products.
Isolation & GPIO Driver — MOSFET, BJT, Relay, Optocoupler
A complete guide to driving high-power loads from an MCU — MOSFET voltage-controlled switching, BJT vs MOSFET comparison, relay isolation, optocoupler safety isolation, and PWM dimming practice.
Power Supply — LDO, Buck & Boost Converters
A designer's guide to power supply topologies — LDO linear regulators, Buck/Boost switching converters, battery charging, protection circuits, and practical selection criteria.
Signal Amplification — Op-Amp & Voltage Comparator
Core principles, classic circuit analysis, and industrial applications of operational amplifiers and voltage comparators — non-inverting/inverting amps, adder, subtractor, integrator, differentiator, differential amplifier, and sensor interface circuits.
Signal Filtering — RC High-Pass & Low-Pass
A designer's guide to passive RC filter circuits — cutoff frequency calculation, frequency response characteristics, and practical applications in signal conditioning.
Electronics Fundamentals — Self-Study Notes
A structured study log covering voltage and current theory, Kirchhoff's laws, and the principles of basic electronic components including resistors, capacitors, diodes, and power supplies.