Turn Onoff A Bulb At A Specific Time Using 1 Channel 5v Relay And Ds3231 Rtc Module Interfacing With Arduino Uno Kt866turn Onoff A Bulb At A Specific Time Using 1 Channel 5v Relay And Ds3231 Rtc Module Interfacing With Arduino Uno Kt866 67f417a63520019a097e91b5