Lowest possible voltage to operate sprinker valve

[Orpackrat]

I am starting to make plans for paint sprayer that is electronicaly operated with a sprinkler valve. The valve does not have to open fast, but it can't be to slow either. I won't be modding the valve for a blowgun or anything since it needs to be electonically operated.

What is the lowest possible voltage that would be needed to operate the soliniod on the sprinkler valve?

[dongfang]

Hi,

You can get sprinkler valves with 5 volt solenoids, but they cost more..

Regards
Soren

[Orpackrat]

Is there a specific name for the lower voltage sprinkler valve or would if be something like "Low voltage Sprinkler valve".

[darkmilk]

why? just use regular voltage

[Orpackrat]

why? just use regular voltage

Because that is not an option from the power source. If I could use regular voltage, I would.

[Redcoat]

Well, the sprinkler valve i have I think is about 14v or 16v I haven't checked in ages but a 9 volt battery worked it well enough.

[Orpackrat]

The voltage is only going to be 3-5 volts.

[trae08]

you can also get solenoids that plug into the wall outlet if im not mistaken...

[darkmilk]

whats ur power source, is it a keychain remote, then just hook it up to a relay and then use higher voltage batteries

[Orpackrat]

My power source is a battery operated alarm clock.

[jimmy101]

I don't think you'll be able to get enough ooomph from 3~5volts.

Like darkmilk suggested, run the low voltage from the clock to a 3~5V relay. Then have the relay switch a 9V, or two 9v's in series, to operate the solenoid.

Of, replace the solenoid with a power transistor or SCR.

[Orpackrat]

Thanks for everyones help.

[iPaintball]

Solid state switching, FTW!

[dongfang]

Hi,

As for the types of those low voltage valves, I suggest you check the web catalogs of the manufacturers - I only know Rain Bird here, but other places have many more. I think they are listed as "5 volt version".

Alternatives:

- Wind your own coil, but that needs some engineering and is boring to do.
- Add a higher voltage supply, and have a transistor switch it
- Use a step-up converter

Regards
Soren

[jackssmirkingrevenge]

a small solenoid from a washing machine or dishwasher perhaps?