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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 see that you already told me that the solenoid is 6 volts. This will work with the circuit above but knowing the current will still be needed so that the proper pull up resistors can be put on the drains of the MOSFETs

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  • jw0752
    0 jw0752 over 7 years ago

    Hi Simon,

    I see that you already told me that the solenoid is 6 volts. This will work with the circuit above but knowing the current will still be needed so that the proper pull up resistors can be put on the drains of the MOSFETs

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  • jw0752
    0 jw0752 over 7 years ago in reply to jw0752

    Note to jc2048 ,

     

    You may note that I learned from your suggestion on the other thread and I used both sides of the bi-stable.

     

    John

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