use an relay here , no, never" but for signaling the level to some transistors in between - you may use lots of relays, but not directly! the 3.3 Voltage is only for signaling - never use it for power delivering, it only an little poor chip there. realys need an amplifie aka transistor and mostly use 12 v to react.
try an little googleing on interfaces for relays.
holgefr
try an little googleing on interfaces for relays.
holgefr