components

identify parts, read values, and learn what each one does.

cables & wire

solid vs stranded, gauge

diodes

direction, drop, protection

variable resistors

pots: divider & rheostat

resistors

values & color codes

capacitors

store & smooth energy

leds

blink, dim, and color

switches

spst, dpdt, click!

relays

electrically operated switches

transistors

tiny current magicians

connectors

plugs, sockets, headers

555 timer IC

classic timers & fun circuits

4000 series ICs

cmos logic basics

74 series ICs

ttl logic basics