guides
a growing notebook of electronics basicssoldering
tools, tips, joints, and care
tools
what to buy first (and what can wait)
books
forrest mims & friends — a soft syllabus
circuit symbols
read schematics like a map
breadboard
wiring patterns, rails, and common gotchas
power & protection
keep your projects happypower basics
voltage, current, polarity, fusing
batteries
alkaline vs li-ion, charging, safety
regulators
ldo vs buck, dropout, layout tips
polarity protection
schottky, ideal-diode mosfet tricks
core parts
the everyday toolkitresistors
values, bands, dividers, pull-ups
capacitors
decoupling, electrolytic vs ceramic
diodes
signal, schottky, tvs, flyback
transistors
bjt & mosfet switching basics
op-amps
buffers, gain, filters
leds
current limit, series/parallel, rgb
switches
spst, dpdt, debouncing
cables
gauge, strain relief, power delivery
connectors
dupont, jst, barrel, usb-c
sensors
analog vs i²c/spi, calibration
motors
dc, servo, stepper, drivers
relays
coil drive, flyback, solid-state
brains & comms
make things talkmicrocontrollers
arduino, rp2040, basics of pins & timing
comms
uart, i²c, spi — when to use what
ic basics
packages, pinouts, reading datasheets
4000 series
cmos logic building blocks
7400 series
ttl classics for glue logic
555 timer
astable, monostable, pwm tricks
op-amp playground
comparators, oscillators, filters
build & debug
from idea to sturdy thingbuild workflow
prototyping → testing → enclosure
pcbs
kicad basics, fabrication, assembly
enclosures
laser-cut, 3d print, hardware choices
simulate
falstad, ltspice, testing ideas fast
troubleshooting
debug flow, common failure modes
safety
esd, mains, batteries, safe labs
study notes
formulas, reference tables, cheats