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Electronic Siren using Timer ICs with Power Supply (C.R.) Manufacturer,Supplier and Exporter in India

Product Code : SCL-EELE-12295

Indian Lab Suppliers supplies the Electronic Siren using Timer ICs with Power Supply (C.R.) (Product ID: 12295) as part of its electronics engineering lab equipment range. It builds an electronic siren from two timer ICs, one frequency-modulating the other.

Quick Answer

The first timer runs as a slow astable multivibrator, and the sawtooth voltage across its timing capacitor is fed to the second timer, an audio-frequency astable, so its pitch rises and falls like a siren. The tone drives an 8 Ω speaker on the panel. Two potentiometers adjust the timing, and a push-to-ON switch sounds the siren. Test points allow waveforms to be observed, and the board runs from an internal 5 V DC, 100 mA IC-regulated supply with no other apparatus needed.

Key Specifications

Parameter	Detail
Experiment	Electronic siren: astable timers and frequency modulation by a sawtooth
Timer ICs	Two
Output	8 Ω speaker
Controls	Two potentiometers; push-to-ON switch
Supply	5 V DC at 100 mA, IC regulated, internal
Mains	230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and indicator lamp
Other apparatus	None required