image/svg+xml LPC-H1114 ~BC337 relay, ~5 V AC ~220 V → DC ~5-7 V AC ~220 V thermo actuator(Herz 1 7710 00) PWR GND P3.0 ~1 kOhm SHT1x +3.3 V GND P2.4 P2.5 SCK DATA P1.6 P1.7 P0.1 GND RSTN Thermo regulator PC interface GND DC ~5-7 V