police siren circuit | Projects › Projects › police siren circuit This topic has 1 reply, 2 voices, and was last updated 7 years ago by Ashutosh Bhatt. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts August 16, 2017 at 9:08 am #4689 NirajParticipant can anyone tell how to design police siren circuit? circuit diagram? how circuit works? August 27, 2017 at 12:26 pm #14655 Ashutosh BhattParticipant its preety simple circuit it can be designed using IC NE555 in astable mode Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In