high

Rele DC+ → 12+
Rele DC- → 12-
Rele IN → Rpi 5.5+
Rpi GPIO → 27K → Tranz Baze
Rpi GND → Tranz Emiteris
Tranz kolektorius → 12-

low

Rele DC+ → 12+
Rele DC- → 12-
Rele IN → Tranz colektorius
Rpi GND → 12-
Tranz emiteris → 12-
Baze → 27K→ Rpi GPIO