NOKIA1208ALARMMODULEDIYRevAugust2011.ThankyouforbuyingaNokia1208alarmmodule.ThemoduleisoutasALLPICasofJanuary‘10.Thismoduleisnowconsideredasthe‘final’version!Withallpreviousmodulesnowobsolete.TherevisedPCBalsohas3ofthekeypadbuttonsONBOARDtheseoperatethemobilephoneanda‘test’buttonallmarkedlegendsonthemodulealongtheedge,.Powerisfromabatterypack,orfromthephoneitself.,youcan’tuseboth!Otherwiseitwill‘fry’Inaddition,youdon’thavetouseallthefunctionsavailablePLEASEAQUAINTYOURSELFWITHBUTTONSSWITCHESASBELOWPCBMK509OverviewTestbutton.Thisisto‘test’themoduleandtriggerit.LNR.Thisbuttonreplacestheoneonyourphoneandisusedaslastnumberre-dialcheckordialwhenpressedtwice.Menu.Thisbuttonreplacesyour‘menu’selectbuttononthephone.On/off/cancel.Thisbuttonreplacesyouron/off/cancelbuttononthephone.PWRon/offswitch.Controlsmodule.AUTO-ON/OFFControlswhetherthephoneisautomaticallyswitchedon/offornot,ifyouwanttosendasavedwrittentext.(seelater)Generallyleftinthe‘on’position.O/Sswitch.Youcanusethisifyoudon’twantthemodulegoingoffallthetimeateachtriggering!And‘Onceonly’isinthe‘on’position.TXTVOX.Choosewhethertomakeacallorsendatext.Atswitchon,anindicatorLEDfor‘exit’delaywillflashfor15seconds.WhentriggeredtheLEDwillremainonforapprox10secondsasanentrancedelayThesedelaysarefixed.Aftertheentrancedelaythephonewillpowerupandonceinitialisedwillmakeacallorsendatext.Afterapprox45secondsthephonewillpowerdownandthemodulewillrevertbacktostandby.n.b.thewhitegoestotherearofthephoneconnectedtothepositivesupplypadIntroductionThemodulecontrolsthemobilephoneinawaythatconservesthebatterypowerbyturningthephoneonandoff,inadditionthemoduleelectronicsareallturnedtoadormantstate.Allthepowerneededtoboththephoneandmoduleisprovidedbyeitherabatterypackorthephoneitself.ForthetechnicallymindedthePICchipisin‘sleep’modeafterpoweron,untiltriggered.WhentriggeredthePICmicrocontrollerhandlesthevariouspowersignals/timingsetctotheOpto-isolatorsthatoperatethekeypads-thereafterthePICrevertsto‘sleep’mod