Nowadays, mail-order printed circuit boards (PCBs) cost as little as $2 a piece. Using surface-mount parts (SMD) tend to be compact, abundant, and about as easy to use as through hole parts.
lcamtuf’s thing takes a look at using surface mount parts to include the dizzying variety of surface-mount package sizes. In the world of through-hole components, almost every part has a familiar footprint. When it comes to SMD, DigiKey stocks about 100 different form factors for resistors alone.
https://fr.wikipedia.org/wiki/Composant_mont%C3%A9_en_surface
https://lcamtuf.substack.com/p/making-sense-of-surface-mount-components
https://lcamtuf.substack.com/p/setting-up-an-electronics-workshop