| 摘要 |
An ornament light chain circuit comprising a plurality of LEDs, a switch circuit, a pressure sensor, a signal amplification circuit connecting to the said pressure sensor, a chip including a switch terminal, a light signal terminal and a signal input terminal with the said switch terminal connecting to the switch circuit, the said light signal terminal connecting to the said LEDs, and the signal input terminal connecting to the signal amplification circuit so as when its user blows air to the pressure sensor, the sensor detects a pressure signal, the pressure signal is amplified by the signal amplification circuit and then transmitted to the signal input terminal, and then the chip turns off the LEDs via the light signal terminal. The present light chain can be served as an electronic candle. Such an ornament light chain circuit can be applied in greeting cards, birthday cakes, dolls and the like.
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