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Archives for May, 2012

Earthquake Detector

Earthquake Detector Biased photodiode, Earthquake Circuit Diagram, earthquake detector, frequency counter, optical receiver, Oscilloscope, plane miror, two frequency laser  

Audio Amplifier Circuit using STK459

Audio Amplifier Circuit using STK459

Creating 125KHZ oscillator

Creating 125KHZ oscillator This circuit is similar to CMOS INVERTERS FORM 125KHZ oscillator but adds more invertors in parallel to provide greater power.

Circuit diagram DTMF Decoder using HT9032A MT88L70 HT9202H

Circuit diagram DTMF Decoder using HT9032A MT88L70 HT9202H This exciting project and something that many have been developed, but always remains to add some improvements. The DTMF decoder circuit for distinguishing some separate external components to produce devices capable of sending binary code from a button on the multi-tone phone. This circuit, in addition to […]

Driver LED circuit for Indicator

Driver LED circuit for Indicator using NE555, 4027, 1N4148

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