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Archives for June, 2010

Audio Filter Circuit without voltage

Audio Filter Circuit without voltage Audio Filter Circuit without voltage

Rf Preamplifier

Rf Preamplifier using dual gate mosfet BF990A Rf Preamplifier using dual gate mosfet BF990A

wiper motor control circuit

wiper motor control circuit using NE555, CD4017 wiper motor control circuit using NE555, CD4017

sensor circuit

Alarm music for sensor circuit using UM3483 R1,3,4 ……….. 100K R2 …………… 56K R5 …………… 330K VR …………… trimport 100K C1 …………… 33pF C2 …………… 22uF/10V C3 …………… 100nF C4 …………… 4,7uF/10V C5,6 …………. 20nF C7 …………… 100uF/10V Q1 …………… 9012 Q2 …………… 9013 IC1 ………….. UM3483, MB683 S1 …………… Push on Sw SP …………… […]

Audio Oscillator Schematic diagram

Audio Oscillator Schematic diagram using BC549, BC559

STK461 Class D Modules

STK461 Class D Modules STK461 Class D Modules Circuit Diagram STK461 Class D Modules STK461 Class D Modules

USB to Serial Converter

Making USB to Serial Converter using  Tr BC557 and BC547

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