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