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The add-on circuit presented here is useful for stereo systems. This circuit has provision for connecting ster......
The circuit comprises a 3-stage resistor-capacitor coupled amplifier. When ring button S2 is pressed, the ampl......
This circuit produces the famous Big Ben sound. It produces the ding dong sound when switched ON. Basically th......
This circuit produces the sound of a beeper like the one in pagers which produces a beep-beep sound. Basically......
This circuit produces a sound similar to a factory siren. It makes use of a 555 timer Ic used as an astable mu......
This circuit produces a sound similar to the police siren. It makes use of two 555 timer ICs used as astable ......
The circuit presented here wakes you up with a loud alarm at the break of the daylight. Once again the 555 tim......
This circuit not only indicates the amount of water present in the overhead tank but also gives an alarm when ......
This is basically a flasher circuit modified to turn on and off a bulb instead of a LED. It uses a 555 timer I......
Most of the power supply failure indicator circuits need a separate power supply for themselves. But the alarm......