Versatile Audio-Visual Alarm

The versatile audio-visual alarm circuitThis circuit uses a NE555 timer IC, some LEDs, a couple of piezo buzzers and a few other components to produce audio-visual effects as per your requirement. The timer NE555 and its equivalents are widely used for all sorts of audio and visual indications, such as door alarms. But the sound produced by these circuits […]

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Electronics, Electrical

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