Circuits

It is surprising and confusing how good people get at electronics without persay being very mathemtical about it. Some of it is pattern recognition

Circuits are not functions. They are relations The delusion of perfect sources

Analog

https://en.wikipedia.org/wiki/Category:Analog_circuits

Voltage Divider

https://en.wikipedia.org/wiki/Voltage_divider

Current divider

https://en.wikipedia.org/wiki/Current_divider

Bridges

Low pass

High Pass

Op Amps

The golden rule.

Integrators Differentiators

Transistors

BJT MOSFET

biasing

Golden rules

Current mirror

Transformers

555 Timer chips

Analyses

Node and mesh

Laplace transform. Because we care about impulse response

Circuit duality

Lanzcos matrices

Oscillators

Filter Networks

Matrices connecting ports to each other. Some compose nice

Polynomal designs

Iterated filters and brillouin book.

Transmission Lines

Line imppeance

Radio

Models of antenna

Circuits aren’t the circuits you think they are. Shit gets messy

Waveguides

Modulation Multipliers

Complex signals smith charts

SDR

https://nostarch.com/field-expedient-sdr-volume-one sdr book

RTL-SDR https://en.wikipedia.org/wiki/In-phase_and_quadrature_components IQ quadrature lime gnuradio hackrf one

Debugging / Measuring

Multimeter Oscilloscope scope tutorial

Simulation

Qucs

https://lushprojects.com/circuitjs/ https://www.falstad.com/circuit/

PCBs

KiCAD DIY

https://github.com/atopile/atopile

Digital

Discrete Chips 7400

https://en.wikipedia.org/wiki/List_of_7400-series_integrated_circuits A little bit this kind of thing is just for fun. You can get insanely powerful micorcontrollers for cheap. You could argue maybe for simplicity or speed or parallelism. Serial latch

Microcontrollers

Misc

Art of electronics - didn’t really like this one. ARRL handbook is really good actually https://www.youtube.com/@w2aew

https://github.com/paulhdietz/LEDSensors?tab=readme-ov-file led as sensor