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声级计电路 Sound Level MeterThis nifty sound level meter is a perfect one chip replacement for the standard analog ......
音量指示器--Sound Level IndicatorThis project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB r......
escribed here is a very inexpensive solution to many phono-controlled applications like remote switching on, f......
This circuit produces the famous Big Ben sound. It produces the ding dong sound when switched ON. Basically th......
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dolphin 2011-07-29
dolphin 2009-08-25
dolphin 2009-08-25
dolphin 2009-08-25
