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Parrot Sounding AC door Bell
Posted on Monday, October 18, 2010   •   Category: Miscellaneous

Parrot Sounding AC door Bell

Here is a mains-operated doorbell that produces parrot-like sweet voice without requiring any musical IC. The circuit is cheap and easy to construct. The AC mains is fed to the circuit without using any step-down transformer.

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     12V Fluorescent Light Inverter
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     5 - 30 Minute Timer
     Sound Operated Switch
     Simple 300W Lamp Dimmer
     Animated Christmas Star
     Alarm Sounds When Refrigerator Door Remains Open Too Long
Parrot Sounding AC door Bell

 

Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]



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