On Tue, 19 Aug 2003 11:22:16 -0400, you wrote: >I'd definitely choose an LED. >Reducing the power consumption is all about the on time. If you set up = the >limiting resistor to provide ~20ma (yes a huge amount for a battery = device) >but only have the LED on half the time, instantly your power consumption= is >cut in half. Yes that's still to much, but consider a much more extreme >example -- 10ms every 2sec, that drops your average current to 0.1ma. = Quite >acceptable for most battery powered devices. You can stretch this = further, >but there is a minimum on time that is reasonably viewable, as well as a= max >off time before it annoys users. ..and use a low-current LED, which provides good brightness at a couple = of mA. >-Denny >----- Original Message ----- >From: "John Pearson" >To: >Sent: Tuesday, August 19, 2003 10:48 AM >Subject: [EE] low power on/off indicators > > >I need to include an on/off indicator to my project. It is battery = operated >so it needs to be low power consumption. > >Some ideas I had were an led that blinked every second or so. > >Or maybe something that beeped or clicked every few seconds. > >This is an industrial environment. > >Any ideas or thoughts? > >Thanks > >John > >-- >http://www.piclist.com hint: To leave the PICList >mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu