using a 555 timer to suspend
this will only apply to ATX boards with APCI (or is it ACPI?) compatible power buttons.
ok, so i remember somewhere seeing an option--either in windows or in my BIOS--to have the computer go to SUSPEND when the power button is pushed breifly (less than 5 sec.)
maybe I could set up a 555 timer IC so that when the ignition is turned off, the power button is "pressed" for about 1 sec, thus putting the computer in suspend mode. can we say instant boot?
ok, now i know ive made it sound a whole lot simpler than it actually is, but this could work. it could also work to shutdown, too. basically the idea is that the "trigger" on the 555 is held (by a relay) until the car turns off, at which point the trigger is released and the 555 oscillates--with the correct values for R and C--for about 1 second. as long as the button isnt held down for more than 5 sec the power will stay on, but in suspend. this really isnt a question, but more of a "hey, what if.."