雙線燈閃光燈電路
雙線燈閃光燈電路--Two-wireLampFlasherIdealtooperate3to24VDCexistingon-circuitlampsLEDoperationisalsopossible
Parts:R1______________6K81/4WResistorR2____________270K1/4WResistorR3_____________22K1/4WResistorC1____________220΅F25VElectrolyticCapacitorC2_____________10΅F25VElectrolyticCapacitorD1___________1N4002100V1ADiodeQ1____________BC55745V100mAPNPTransistorQ2____________BD13980V1.5ANPNTransistorLP1___________ExistingfilamentLamp:anytypeintherange3-24V10Wmax.SW1___________ExistingOn-OffswitchB1____________ExistingVDCsource:anytypeintherange3-24VsuitedtothelampadoptedDevicepurpose:Thiscircuithasbeendesignedtoprovidethatcontinuouslightlampsalreadywiredintoacircuit,becomeflashing.Simplyinsertthecircuitbetweenexistinglampandnegativesupply.Especiallysuitedforcarorpanelpilotlights,thisdevicecandrivelampsupto10W.Notes:Breaklamp(s)tonegativesupplyconnection(s),theninsertthecircuitbetweenexistinglamp(s)connection(s)andnegativesupply(respectingpolarities!).C1valuecanbevariedfrom100to1000΅Forhigher,inordertochangeflashingfrequency.Althoughratheroversized,thiscircuitcanalsodriveanyLED,providingasuitableresistorisfittedinserieswiththelightemittingdevice.Theresistorshouldbeintherange47Rto2K2,dependingonsupplyvoltage.
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