Electronic Siren using Timer ICs with Power Supply (C.R.) Manufacturer,Supplier and Exporter in India
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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 |
Where This Is Used
Used in timer-IC and audio-circuit practicals. Related: Burglar Alarm using 555 Timer & LDR with Power Supply (C.R.) (Product ID: 12297) and Frequency Multiplier Using IC-555 and OP AMP IC-741 (Product ID: 12096). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
How is the rising and falling tone produced?
A sawtooth from the first timer modulates the frequency of the second.
How is the siren sounded?
With the push-to-ON switch.
Does it need extra equipment?
No, the supply and speaker are built in.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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