Simply put, this device will indicate, via lamps and/or alarm, if the reset button has NOT been pressed within the required time limit; essentially a "Dead-Man" switch. If someone does NOT press the button, that would indicate a problem of some sort, whether the person fell asleep, got kidnapped, or is in some way incapacitated and CANNOT press the button. The other lamps and indicators are to alert the "button-pusher" that his/her time is nearing zero hour. Any more information than that and NDA's and/or Confidentiality Agreements will be required.
Can anyone point me toward a decent, low-cost circuit design simulation program/software that I could use to help me design this thing?
Other than Eraldo and barshatriplee (thanks!

), I'm beginning to get the feeling that I'm not going to receive much help from here…
