MOBILE_RADIO_ON_ALARM_TIMER

Published:2009/6/18 3:33:00 Author:May | From:SeekIC

This system will prevent you from accidentally leaving your mobile radio on, draining the battery.LED1 will light when the vehicle's ignition is on, or while the car is running. Switch S1 in the ON po-sition will close relay K1, completing the power circuit to the equipment. If the ignition switch is shut off, and switch S1 is still in the ON position, an alarm (piezo) will begin to beep and LED2 will flash.Returning S1 to the center position will shut everything off. If equipment operation is desired after shutting off the vehicle, you can place switch S1 in the AUT0 position and momentarily press S2, a normally open push-button switch. Depressing this switch begins a timing cycle. The length of time that the Mobile-ON alarm/timer operates before shutting everything off can be prograrrtmed by se-lecting R6. The approximate time delays are provided in the chart with the schematic. Or, you could change the value of C6. These components control the holding time of relay K1. LED3 will light while the circuit is in AUT0 status. Incidentally, you can also cartcel the time delay at any time during the delay period by simply switching it off.



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