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Need help understanding what this circuit does (urgent)

Discussion in 'General Electronics Discussion' started by James.Slats, Oct 19, 2016.

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  1. James.Slats

    James.Slats

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    Oct 19, 2016
    upload_2016-10-19_11-25-10.png
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    There is no way to tell.

    I suspect that pressing of the keys is associated with solenoid activation and possibly changes in the LED display.
     
  3. James.Slats

    James.Slats

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    Oct 19, 2016
    As far as i know it is a security alarm circuit diagram it is off the picaxe website - CHI008. I just need help understanding what the circuit does
     
  4. R0und_R0bin

    R0und_R0bin

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    Oct 14, 2016
    This makes me think of an electromagnetic door lock with keypad activation. But it is more a synoptical schematic than a true electronic one
     
    davenn likes this.
  5. ramussons

    ramussons

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    Jun 10, 2014
    The Relay operates when a particular sequence of the Keyboard is operated; though I see that the IC will never get V+ to operate.
     
  6. Pieter Kralt

    Pieter Kralt

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    Oct 19, 2016
    As drawn it will do about nothing. Where did you get this schematic? What's the type of the IC?
     
    davenn likes this.
  7. AnalogKid

    AnalogKid

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    Jun 10, 2015
  8. davenn

    davenn Moderator

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    thread closed

    to the OP .... do your homework, and next time post all the info


    Dave
     
    R0und_R0bin likes this.
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