Scheme Series Car Alarm Siren Police

Scheme Series Car Alarm Siren Police | siren circuit in the figure is a series of the police car siren alarm. Consists of 2 pieces of IC TL 555 as astable multivibrator, VR1 and VR2 will set the alarm sound output so you will be able to set / adjust the tones produced are similar to real police car alarm.
Schematic circuit Police Car Alarm Siren
If the dihasikan otput sound speakers less than the maximum, you please add such mini power amplifier 8 watt amplifier (LM383 Or TDA2002) or can use other amplifer fit your needs. You can cut the siren output circuit above and used as the input of the amplifier. Have a try!!!