Thanks for the reply. Only one fan needed.
Rick

if your using 2 fans then wire them in series and power both from the 24 volts supply.
Each will only get 12 volts and be fine.

Thanks Martin will post picture when ready.
Rick

Hi Rick,
Good to hear you are starting to get this project underway.
I would like to see some photos of this Sonic mister as you progress.

Martin555.

Received the fans for the project.Set up and powered the fan on 12 v to test them.Then used a 9 v supply that worked well.The fan will now have on-off switch have a separate power source from the ultra sonic mister.
Will now work on the 24v power for the mister.
Rick

If you use 24 volts to power a 12 volt fan it will burn out and possibly catch fire.
Use 12 volt power supply.

Thank you ToraDog this helps now.
Rick

Rick,
I am sorry if was not clear. I often use sealed lead acid (sla) batteries in my builds. I usually use a 12 volt/7 amp hour for my motors and electronics. In order to get the 24 volts require by the misters, I wire a small, 12 volt/1.2 amp hour battery in series with the drive battery. The power leads to the ESC and other 12 volt needs are connected to the 12 volt battery in the regular manner. You would hook up the mister to the available 24 volts by connecting to the + (positive) of one battery, and the other lead to the - (negative) of the second battery. In technical terms you are creating series parallel circuits. Remember that the mister uses very little amperge, but it needs the "push" of the increased voltage. That said the extra push does not need a lot capacity, it can come from a very small battery, say 4 AA size. Like the battery packs that come with radio receivers.

Thank you all for the help will need to re read the posts to make sure I understand all that is said.I get the step up converter as that is what is in the write up for the build.
ToraDog sorry but what is 1.2 a battery.Could you draw out or write up how you make the connections and batteries used.
Rick

Rick,

I’d suggest the best solution would be to use one 12v battery and a step up buck converter to give you 24v for the mist generator. There are plenty of buck converters available on line. Something like this one.

Graham93

There is a very easy solution to your problem. I have used the 24v ultrasonic misters and run my main power off a 12v power source. For the misters I simple wire a very small, 1.2 a battery in series with the main 7a 12v drive battery. The power to the boat is taken off the 12 source, while the mister draws off the 24v created by series wiring the to batteries.
You do not need two 12v batteries of the same size for the misters.
I hope this makes sense.

Hi Rick,
It sounds to me that Graham93 has given you the best solution.

That way you have both 12 Volts and 24Volts.

Martin555.

Hi Martin and Graham. Unfortunately the ultra sonic mist generator is 24 v thous the need for two batteries in series for 24v. Question? Would a step down converter from 24v to 6v if used would it slow the fan down.
Rick
Rick

Hi Rick,

Yes, 24v will be too much for a 12v fan. I would expect the fan to be happy with somewhere in the range 9v to 13v, preferably 12v! You could consider running it off one of the two batteries, but would need to work out how to switch it on/off.

I’m with Martin though, why do you need 24v?

Graham93

Hi Rick,
Why are you thinking of using 24 Volts ?

Martin555.

Hi Martin. That's were I'm in trouble if not stepped down the power would be 24v to the fan.I need the fan to move mist from the ultra sonic mister up the stack.
Rick

Hi Rick,

Sorry if i am getting this wrong but are you saying that you are thinking of powering a 12Volt fan with 24Volts ?

Martin555.