Sense Multiple Pushbuttons Using Only Two Wires

Abstract:Forapplicationsthatrequirelessthanakeyboardornumerickeypad,thissimplecircuitmonitorsmultiplepushbuttonswitchesusingasinglemulti-channel1-Wire®addressableswitch(DS2408),andafewexternalcomponents.Maxim>Designsupport>Appnotes>1-WireDevices>APP4849Maxim>Designsupport>Appnotes>InterfaceCircuits>APP4849Keywords:1-Wireswitches,pushbuttonswitches,microcontrollersFeb10,2011APPLICATIONNOTE4849SenseMultiplePushbuttonsUsingOnlyTwoWiresBy:BernhardLinkeAbstract:Forapplicationsthatrequirelessthanakeyboardornumerickeypad,thissimplecircuitmonitorsmultiplepushbuttonswitchesusingasinglemulti-channel1-wireaddressableswitch(DS2408),andafewexternalcomponents.AsimilarversionofthisarticleappearedintheSeptember9,2010issueofEDNmagazine.Keyboardsandnumerickeypadsoftenprovidetheuser