Miles McKinnon wrote:
>
> Hi,
>
> I am building a project to display some data on a couple LCD's in a automotive system.  The PIC also monitors wheather the ingnition is on or off.  I want to flash an LED when the ignition is off.  My question is, would I be better leaving the PIC running 24/7, or I was thinking I could use a 555 to flash the LED and have an I/O pin holding the 555 RESET low untill right before I put it to sleep, make it high and let the 555 run.  Will a uC last for years if it is running all the time or is it best to turn off the oscillator with SLEEP?
>
> Thanks for you help.


Most newer car radios have flashing LEDs in them that operate when the
ignition is off and also LEDs for alarms etc. I wouldn't expect the PIC
drawing a few 10's of mA to cause much trouble.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads