Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Police alarm
1. ABSTRACT
POLICE SIREN CIRCUIT
A police siren is a loud electronics device that produces sound similar to police siren. police
siren is used to get other road users or drivers on the road out of their way. Electronic sirens
incorporate circuits such as oscillators, modulators ,and amplifiers to synthesize a selected
siren tone (wail, yelp, pierce/priority/ phaser, hi-lo, scan, air horn, manual, and a few more)
which is played through external speakers. It is not unusual, especially in the case of modern
fire engines, to see an emergency vehicle equipped with both types of sirens. Often, police
sirens also use the interval of a tri-tone to help draw attention.This police siren simulated
electronic project uses two 555 timers IC to generate a sound similar to the police siren. A
single 556 timer IC which consists of two 555 timers can also be used. In this circuit, both of
the timers are configured as astable circuit.
GROUPMEMBERS-
ANOOPKUMAR K V
NITHIN PP
JEFFRIN JOSE
VISHNUC S
AKHILKUMAR M