transistor-dat

types

• ref - https://www.censtry.com/blog/transistor-npn-vs-pnp-difference-between-pnp-and-npn-transistor.html

common used

S8050

• relay-dat drive

• S8050 SOT-23 footprint = BC817

pin	name	common
1	base	io input
2	emittor	gnd
3	collector	output

ref

• kicad-dat

• transistor