5v pulse to volt free contacts

Discussion in 'General Electronics Chat' started by gibzy.85, Jun 1, 2016.

  1. gibzy.85

    Thread Starter New Member

    Jun 1, 2016
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    Hi Guys,

    I don't know if any of you able to give me advise but I have a problem and need help.

    Basically I have a credit card machine the gives out a 5no. 5v pulse, all lasting 10ms with a 10ms gap in between each one, I some how need to make it then give 5no. volt free pulses which switch a 24v ac machine.

    Is there an easy way of doing this, such as use a relay (or are the pulses to quick to energise the coil) or is there something special I need to buy to be able to do this?

    Thanks in advance.

    Matt
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    What does that mean? Not a voltage reference I've ever heard of.
     
  3. BobTPH

    Active Member

    Jun 5, 2013
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    Volt free pulses?

    Bob
     
  4. gibzy.85

    Thread Starter New Member

    Jun 1, 2016
    3
    0
    Yes, volt free pulses that switches a 24v ac machine

    Matt
     
  5. crutschow

    Expert

    Mar 14, 2008
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    If it's a pulse it has volts, so you need to tell us what you mean by "volt free"? :confused:
     
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  6. gibzy.85

    Thread Starter New Member

    Jun 1, 2016
    3
    0
    As I said the credit card machine gives out 5no. pulses at 5v but to activate the machine it needs 5no volt free contacts to be made.

    Basically they have given us two cores off there machine controls that when touched together 5 times activates and starts the machine for a set period of time.

    Hope this is of more help.
     
  7. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Why does the AC machine need five pulses to get it started?
    How long must it run for once started?
     
  8. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Try using a CD4016 quad switch, 10mSec is too fast for a relay, if you need five gates you will need two chips.
     
  9. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    Nope, not helpful. Repeating the same thing adds no clarity. Pedantically defining each piece of information however is helpful, as is avoiding any and all acronyms.

    I have no idea what 5no means, or free contacts, nor what touching something called a core means.
     
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  10. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    I assume 5no means "five in number".
     
  11. ScottWang

    Moderator

    Aug 23, 2012
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    Please post the links of credit card machine, if you have the datasheet also upload or post the links.
     
  12. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Maybe if he posted in all caps, we could understand.
     
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  13. KMoffett

    AAC Fanatic!

    Dec 19, 2007
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    I think that Dodgydave is on the right track. OP is saying the 24Vac machine requires 5 sequential closures of a "dry contact" switch. The credit card machine puts out five sequential 0-5V pulses. The question is, is there really 24VAC at the input of the 24Vac machine?

    Then I could be completely wrong. ;)

    Ken
     
  14. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    When you want to switch AC with an optocoupler have a look at the AQV21.

    Bertus
     
  15. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    I think the op means "5 normally open contacts" and he wants to make them to pulsed ones.
     
  16. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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    "The credit card machine has a normally open output. It is closed and opened five times to supply 5v to the machine in order to activate it. "

    Is this close?
     
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