Letter Box Monitoring and Alerting System

Discussion in 'The Projects Forum' started by Raghuvir_G, Nov 3, 2014.

  1. Raghuvir_G

    Thread Starter New Member

    Oct 27, 2014
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  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Have the micro sleep most of the time and only wake up occasionally to power-up the IR Tx for a very brief period. OR...... discard everything except the battery and buzzer and use a micro-switch to activate the buzzer ;).
     
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    Eliminate the linear regulators.
    Run the entire circuit on the same Vdd.
    Reduce the number of LEDs.
    Use an ultra low-power uC.
     
    Raghuvir_G likes this.
  4. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    Alec has the correct solution. Turn on the transmitter only when a mechanical switch changes state. I would use a mercury switch taped to the inside of the mail box door.
     
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  5. Raghuvir_G

    Thread Starter New Member

    Oct 27, 2014
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    that is a good idea, will do this
     
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