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华丽牌KC-14、KC-16、KC-18，KC-23窗式空调器电路如下图： ......
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Normally the base of a cordless phone has an adaptor and the handset has Ni-Cd cells for its operation. The ba......
The circuit shown here is used to switch on a lamp when the tele- phone rings, if the ambient light is insuffi......
Here is a simple yet very useful circuit which can be used to eavesdrop on a telephone conversation. The circu......
dolphin 2009-08-25
dolphin 2009-08-25
dolphin 2009-08-25
