NE555 12V Modulo Interruttore Timer Relè Ritardo Tempo di Disconnessione/Connessione Regolabile
Main chip: NE555. Delayed Disconnect disconnection. Relay closure indicator. With relay current protection. 1, turn on the power relay delayed suction. For example: capacitor 47uf resistance 500K T = 1.1 500000 0.000047 = 25.85 seconds.