Kindly give me a documentation of fire alarm circuit using LDR for class 12 cbse physics project
Posts: 14,118
Threads: 61
Joined: Oct 2014
A fire alarm is an electronic probe or a bell. The probe emits a loud and loud sound to alert people that there is a fire in the building. The sirens can be programmed to sound different tones. Most fire alarm probes in Europe sound like a siren. The bell makes a continuous ringing sound. Some companies that make fire alarms are Whee-lock and Simplex. There are also Fulleon which are best known for their electronic resonator Roshni. These sirens are often used around Europe and have 32 tones selectable by the user. Sometimes, old-fashioned fire alarms are metal bells. Many fire alarm systems also have flashing lights. These are important for deaf people who can not hear the fire alarm.