AUM010
Audio
TDA2030 audio amplifier
Build a class-AB mono amplifier around the classic TDA2030.
Original schematic↗
A PLAYGROUND FOR PRACTICAL MINDSSmall parts.
Small parts.
Big possibilities.
A little inspiration for your next bright idea.
Discover circuits, build your understanding, and make room for a little experimentation.
THE FEATURED CIRCUIT01 ↗
Listencloser.
AUDIO / AUM002Big ideas.
Big ideas.
Small signals.
Meet the electret microphone preamplifier.
THE READING ROOM↗
Get to the
“aha!”
Understand what happens
between input and output.
A HAND ON THE BENCH↗
Less guesswork.
More making.
Keep the handy calculations close.
CURIOUS SINCE 2001✳54 ORIGINAL CIRCUITS✳10 AREAS TO EXPLORE✳ONE IDEA AT A TIME
PICK YOUR NEXT LITTLE OBSESSION
Explore everything ↗Where will curiosity take you?
FROM OUR NOTEBOOK TO YOUR WORKBENCH
Browse all circuits ↗Some bright ideas to start with.
MSR003
Test & measurement
LM3914 battery voltage monitor
See a battery’s terminal voltage on a ten-LED display.
Original schematic↗
SEC001
Security & sensing
Capacitive proximity alarm
Detect a nearby hand by disturbing a sensitive RC oscillator.
Original schematic↗
MADE OF PARTS. FULL OF POSSIBILITY.THE PROJECT SPOTLIGHTIt started with
It started with
“what if?”
A toy chassis. Two motors. One curious mind. Explore a radio-controlled robot that brings a handful of familiar building blocks to life.
Meet the robot ↗More projects to explore →GOOD QUESTIONS. CLEARER ANSWERS.
Visit the reading room ↗Feed your curiosity.
BENCH NOTES / 01
↗Understanding air-core inductors
How coil geometry, turns, and the absence of a magnetic core affect an inductor.
BENCH NOTES / 02
↗dBm to watts, explained
Move between logarithmic RF power levels and ordinary power units.
BENCH NOTES / 03
↗Wire gauge without the guesswork
Read wire dimensions correctly before winding an RF coil.
Same curiosity. A new chapter.
Born in 2001. Back for the next bright idea.