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Member's Forum Bistable/latching solenoid valve control circuit. Please help!
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  • change polarity
  • solenoid valve
Related

Bistable/latching solenoid valve control circuit. Please help!

sim.parkin
sim.parkin over 7 years ago

Hi there.

 

This is my first time posting and it's about my first electronics project since school image. So no need to say that i apologise if what I am asking is very simple but still I hope some one can help me.

 

So here's the situ... I want to be able to remotely switch a hose pipe on, but the thing is, the system is fixed into my vehicle so the whole thing has to be portable and run off batteries. I have a remote switch that at the press of a button (on the remote) can momentarily (or it can be set to self lock also) connect the battery to the solenoid valve and switch it on but the valve needs the polarity to be reversed and pulsed to switch it off again. For love nor money can I figure out a way of doing this? My head is in a whirl from all the h-bridge... dpdt relays... flipflops... etc.... every time I research something it seems I need something else to make it work. (if that makes sense) I am lost.

 

In short what I want to do is: Press the button on the remote control once and it turn the water flow on, and press it again and the water turn off. Basically its a momentary push button input that alternates between a +6v output and a -6v output. If that is possible.

 

I want to use this latching type relay because you can get low power ones of this type, but they also save battery power by only requiring a pulse of electricity to change state, rather than energising a coil for longer periods of time. Oh and I also want to avoid using microcontrollers if possible because I can't code.

 

Really hope someone out there can help. I also hope I remembered everything, if I missed something just let me know.

 

Thanks for reading.

 

 

Simon.

 

p.s. I found one other post like this with a guy with my exact problem but he gave up and used a non-latching type. image

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Top Replies

  • jw0752
    jw0752 over 7 years ago in reply to sim.parkin +4 suggested
    Hi Simon, The additional information was helpful and from this information in the data sheet: I have a little more confidence that my circuit can be made to work. Keep in mind you may have to experiment…
  • sim.parkin
    sim.parkin over 7 years ago +3 suggested
    Hi there Guys. Wowsers!! That was both quick and excellent!! Thanks so much for your help with this! Sorry for not being able to reply until now... life . I knew it was possible but couldn't get there…
  • jw0752
    jw0752 over 7 years ago +2 suggested
    Hi Simon, I may have a possible solution for you. This is a bistable or Flip flop that I was playing with the other day. This one is triggered by sound but it could just as easily be triggered with a momentary…
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  • jw0752
    0 jw0752 over 7 years ago

    Hi Simon,

    I may have a possible solution for you. This is a bistable or Flip flop that I was playing with the other day. This one is triggered by sound but it could just as easily be triggered with a momentary push button. Each time the bistable switches I am using it to control a couple of MOSFET which also switch to match the bistable. I take the output of the MOSFETs and feed them to a couple of small LEDs that are parallel but reversed polarity from one another. The LEDs simulate your solenoid. When one lights up you are seeing a + / - polarity and when the other lights up you are seeing a - / + polarity.

     

    image

     

    I have inserted a brief demo of the circuit so you can see how it works. If you would like a schematic and some suggestions for building your own let me know and I will put some more work into it. I will also need to know the voltage of your solenoid as well as the current necessary to switch it from open to closed and closed to open if they are different.

     

    You don't have permission to edit metadata of this video.
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    John

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  • jw0752
    0 jw0752 over 7 years ago

    Hi Simon,

    I may have a possible solution for you. This is a bistable or Flip flop that I was playing with the other day. This one is triggered by sound but it could just as easily be triggered with a momentary push button. Each time the bistable switches I am using it to control a couple of MOSFET which also switch to match the bistable. I take the output of the MOSFETs and feed them to a couple of small LEDs that are parallel but reversed polarity from one another. The LEDs simulate your solenoid. When one lights up you are seeing a + / - polarity and when the other lights up you are seeing a - / + polarity.

     

    image

     

    I have inserted a brief demo of the circuit so you can see how it works. If you would like a schematic and some suggestions for building your own let me know and I will put some more work into it. I will also need to know the voltage of your solenoid as well as the current necessary to switch it from open to closed and closed to open if they are different.

     

    You don't have permission to edit metadata of this video.
    Edit media
    x
    image
    Upload Preview
    image

     

    John

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  • yoyozhou
    0 yoyozhou over 4 years ago in reply to jw0752

    Hi John ,

     

    You are very kind .Your video looks good .

     

    We are a professional manufacture of latching water solenoid valve ,and our water solenoid valves commonly used in intelligent sanitary ware ,intelligent water irrigation timer etc.

     

    If any need i will be so glad to work for you ,thanks

     

    yoyo@hbcsn.com

     

     

    image

     

    Best Regards

    Yoyo

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