The invention relates to a circuit arrangement, for switching a laser diode (10) on and off, with control of the illumination power in the switched-on state for the laser diode (10).

It prevents an LED lamp from shutting off and lighting up repeatedly when the ambient noise and/or lighting level is close to the acoustic and/or optical shut-off or light-up threshold of the lamp.

The driver exhibits inherent soft start and soft shutdown characteristics to eliminate high voltage spikes on power up or power down.

In particular, activation and deactivation, respectively, are to be made possible with one motion.

The switch on and off time is controlled to regulate the output power, either the voltage or the current output being a function of the switch off time divided by the switch on time.

An output of the super capacitor is connected to an on-off circuit (13), and an output of the on-off circuit is connected to an electronic lock (14).

behaviour during power-on and power-off transients

And a switching on method and a switching off method are also provided.

switching cycle means the sequence of switching the lamp on and off at set intervals

Therefore, the switching on/off of the headset is controlled intelligently.

Switching cycle is the sequence of switching on and switching off the lamp with defined intervals

To this end, a smart adapter which is connected between the power supply and the household appliance is provided to carry out intelligent switching on and off.

In each switching cycle, each LED is first switched ON (61) and then switched OFF (62).

Each relay (16-1, 16-2) is used to switch the current flowing in the respective quick-charging line on and off, the current being switched on during quick-charge and being switched off during normal charging.

Signal attributes in accordance with the instant invention include the carrier frequency, spurious emissions, and power-on and power-down transients.