Calculator Alarm

The Calculator alarm looks like a standard desk calculator, with an AC power cord and internal battery backup. The calculator is fully functional, and quite accurate.

By entering a special sequence of codes, the calculator goes into alarm mode. In this mode, there are the following functions:

  • Print out of any alarm events, with date and time stamps
  • Activation code to enter when enabling or disabling the alarm
  • Programming mode, to enter alarm delays, access codes, enable/disable codes, etc.

    The calculator LED display shows prompts and data entry values. All data entry, and current settings, can be printed out on the calculator tape for verification.

    Here's a block diagram of the Calculator Alarm.

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