Quick Question about a Circuit

Discussion in 'General Electronics Chat' started by Calcifer, Aug 2, 2014.

  1. Calcifer

    Thread Starter New Member

    Jun 19, 2013
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  2. shteii01

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    Feb 19, 2010
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    It looks like 0 volts (ground) is connected to Pin 7. 12 volts is connected to Pin 14.

    Those are usually Vcc and Ground pins on most chips in DIP package. The bottom left pin and the top right pin.

    I take it they are using quad AND logic gate chip?
     
  3. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    Yep. Here you go:
    Pin 7 is Ground (0 volts).
    Pin 14 is Vcc (12 volts in your case).


    [​IMG]
     
  4. MrChips

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  5. bertus

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    Hello,

    @ shteii01,
    The TTL chip you show will blow at 12 Volts.
    MrChips has shown the correct pinout.

    Bertus
     
  6. shteii01

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    It is not my intention to tell OP which part/model number to use.

    My intention is to show OP the function of certain pins. Pins 7 and 14 to be precise.
     
  7. bertus

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    Hello,

    There are also TTL chips with the power on the pins 5 and 10.
    Have a look at some of the counterchips.

    Bertus
     
  8. shteii01

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    The OP schematic does not have power and ground on pins 5 and 10. Why should I waste my time on things that OP is not asking about.
     
  9. bertus

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  10. atferrari

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    The link shows "Cmos = 4081".

    Able to work with up to 15 (or it is 18?) V.
     
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