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Home :: ic audio :: Voice Alarm EN54-24 :: 100V Audio …
https://www.ic-audio.com/
ic audio - the voice alarm experts. Certified manufacturer with more than 200 EN 54-24 certified loudspeakers in our catalog. Innovative products "Made in Germany", individual OEM solutions and custom-made designs are developed in the company …
More about the ICs in Snap Circuits Music IC Alarm IC
https://www.elenco.com/wp-content/uploads/2017/10/ic_info.pdf
The alarm ICmodule contains a sound-genera-tion IC and supporting components. It can make several siren sounds. Its actual schematic looks like this: This module has three control inputs, and can make five siren sounds. The OUT connection pulls current into the module (not out of it), usual-ly from a speaker. This current is adjusted to
Voice Alarm :: ic audio :: Voice Alarm EN54-24 :: 100V ...
https://www.ic-audio.com/en/en54/voice-alarm.php
Fire detection and fire alarm systems - Part 4: Power supply equipment. For a manufacturer of EN54 voice alarm loudspeakers all requirements, test methods and performance criteria are defined in the EN54-24 directive. The directive covers every aspect of communication between a fire alarm system and people in the building in case of an emergency.
5 circuits of 555 Alarm sound and tone generator ...
https://www.eleccircuit.com/voice-warming-by-ic-555/
26 Best Alarm Circuits Explained
https://makingcircuits.com/blog/best-alarm-circuits/
Audio Alarm Circuit. In the circuit, U1 amplifies the sound located through the condenser microphone. Resistor R1 restricts current, Whilst R2 and R3 center the output of the amplifier to 1/2 B+ to permit a single power supply to be employed. Diodes D1 and D2 correct the output of U1, and G3 filters the producing pulsating dc.
IC 555 Siren and Alarm Circuits - Homemade Circuit …
https://www.homemade-circuits.com/ic-555-siren-and-alarm-circuits/
The versatile astable multivbrator configuration of IC 555 allows us to implement it for making various types of sirens and alarm circuits. This becomes possible because an astable is basically a waveform generator, and can be customized for generating different types of sound waveforms, resembling alarm and sirens sounds.
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