Latched relay circuit

Discussion in 'General Electronics Chat' started by robbar891, Jul 15, 2012.

  1. robbar891

    Thread Starter New Member

    Mar 22, 2011
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    looking for a circuit that has an input of 6v - 24v 0.5sec to latch a relay for 2sec then release. I have 10 different inputs & 10 outputs, could i use some of the same circuitry.:rolleyes:

    many thanks
     
  2. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    You're going to have to help a bit more. 6 to 24 volts at what current capabilty? Microamps, whole amps?
    It's present for 1/2 second and then gone so it won't retrigger the timer?
    Same circuitry as what?
     
  3. robbar891

    Thread Starter New Member

    Mar 22, 2011
    13
    0
    sorry new here!
    It is about 1A & is gone (not triggered again)
    Do i have to have 10 lots of the same circuit or can i use some of the same componentry?
     
  4. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    Do you want all ten circuits to go on and off at the same time or is each triggered individually at different times?
     
  5. kam-22

    New Member

    Nov 21, 2011
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    I'm working on the same idea for a project at the moment...

    the circuit needs to turn on/off every 9 seconds plus activate 3 12 relays with 4 contact's each and in turn this will latch/switch different circuits at once and also have a counter added to show how many times the circuits are being activated.

    so far,i've built the timer switcher and now need to work on the relay circuits..

    this is on going..
     
  6. robbar891

    Thread Starter New Member

    Mar 22, 2011
    13
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    All ten circuits are triggered manually. (at different intervals)
     
  7. robbar891

    Thread Starter New Member

    Mar 22, 2011
    13
    0
    Is that enough info?
     
  8. robbar891

    Thread Starter New Member

    Mar 22, 2011
    13
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    Can someone point me in the right direction?please
     
  9. absf

    Senior Member

    Dec 29, 2010
    1,493
    372
    I think so unless you use a mcu. You have to make one input and one output work first before you attempt to tackle 10 inputs and 10 outputs problems. For me I would just duplicate the circuits and make one PCB out of them.

    The complicated part about your circuit is the wide input level of 6-24V. If you can bring the range to a fixed level (e.g. 5V), it would be easy to trigger a non-retrigerable monostable like 555 or a TTL or CMOS monos. The output of the monostable would then be connected to a relay where you derive you 2S pulse.
     
    Last edited: Jul 21, 2012
  10. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    If you have 10 circuits to be triggered manually, and there is a possibility that two or more will be active a the same time, you will need 10 individual timing circuits. Look into using NE555 or NE556 timers with transistor drivers for the relays.


    I type too slow, ABSF!!
     
  11. robbar891

    Thread Starter New Member

    Mar 22, 2011
    13
    0
    thanks for advice bill
     
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