Featured Projects

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Amplifier

Class-AB 2SC5200/2SA1943

Robust hi-fi build with A1837/C4793 drivers and thermally-stable bias.
Mixer

4-Chan Op-Amp Mixer

Low-noise summing with 4558/5532, proper grounding and headroom.
Mixer

Passive Tone Control

Uses only resistors, capacitors, and potentiometers to adjust bass and treble.
Power

±24V Linear PSU

TIP41C pre-reg + LM317/337 rails, soft-start and relay delay.

Projects

All projects →

Amplifiers

Class-AB, Class-D, preamps, speaker protection.

Analog Audio

Mixers

Summing amps, tone control, mic preamps.

Studio Op-amp

Power Supplies

Linear ± rails, regulators, soft-start, protection.

LM317/337 TIP41C

Radio / Bluetooth

Modules, filters, low-noise power for RF audio.

Wireless

Microcontrollers

Arduino, STM32, Teensy projects & utilities.

Firmware

Measurement

DIY tools: signal probe, audio tracer, meters.

Tools

Enclosures

Front panels, cooling, wiring, safety.

Build

Other

Misc circuits, experiments, notes.

Lab

Tutorials

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Op-Amp Basics

Gain, biasing, stability, decoupling done right.

Analog

BJT / MOSFET

When to use each, bias points & safe area.

Semiconductors

PCB Design

Grounding, star returns, trace widths, loops.

Layout

Audio Basics

dB, SNR, THD, headroom with practical tips.

Audio

Calculators

All calculators →

Ohm’s Law

V-I-R-P relations at a glance.

Resistor Divider

Pick values, see output & power.

RC Filter

Cutoff & time constant.

Power Supply

Rectifier, ripple, capacitor size.

Simulations

All simulations →

Op-Amp Stability

Phase margin demos in LTspice / Falstad.

Class-AB Bias

Thermal tracking & crossover behavior.

RC Time Constant

Charge/discharge visualizations.

Shop

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PCBs

Boards for featured builds.

Kits

All parts included, ready to solder.

Front Panels

Laser/UV printed panels.

Tools

Helpful build aids & jigs.

Downloads

All downloads →

Schematics

PDFs & source files.

PCB Files

Gerbers & KiCad projects.

Datasheets

Common parts used here.

Site Tools

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Search

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Tags

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News & Updates

All posts →
Site refresh & structure
New navigation, sections, calculators
A cleaner layout with clear categories and fewer clicks.
Class-AB prototype update
Lab • Measurements
Thermal tests done, next is PCB rev B.

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