Universal rotary dimmer with on/off button for resistive, inductive or capacitive loads. The dimmer is equipped with automatic load detection, i.e. the dimmer adjusts the operating mode when the load is first connected. The memory function turns on the lamp (by pressing the knob) with the brightness it had before the last switch-off. For completion the dimmer cover EV102013--, EV112013-- or EV122013-- must be used. No neutral conductor is required for the connection.