I have a 12v Rovin Ceiling Fan the only issue a single speed.
Is there a way to to replace the on /off switch with a speed regulator so slow the fan down ?
Whenarewethere said
09:27 PM Apr 10, 2023
If you know how many amps, get a resistor from Jaycar, put in a 3 way switch also from Jaycar, high > low (resistor) > off.
Gundog said
09:41 PM Apr 10, 2023
Whenarewethere wrote:
If you know how many amps, get a resistor from Jaycar, put in a 3 way switch also from Jaycar, high > low (resistor) > off.
I cannot find the amps this from rovin web page
Specifications:
Power: 12VDC @ 10W
Speed: 272RPM
BarneyBDB said
10:32 PM Apr 10, 2023
I use the dimmer that came with one of my led light sets, works well. I have a spare 1 or 2, if you can send me an address I can post you one, or collect if you are near Adelaide.
Gundog said
10:37 PM Apr 10, 2023
BarneyBDB wrote:
I use the dimmer that came with one of my led light sets, works well. I have a spare 1 or 2, if you can send me an address I can post you one, or collect if you are near Adelaide.
Thanks for the offer, but I think I've got somewhere in my electrical bits box
BarneyBDB said
11:04 PM Apr 10, 2023
OK mate, the fan pulls less than 1 amp and is definitely more comfortable when slowed down.
Mike Harding said
12:59 PM Apr 11, 2023
Gundog wrote:
I have a 12v Rovin Ceiling Fan the only issue a single speed.
Is there a way to to replace the on /off switch with a speed regulator so slow the fan down ?
Maybe: the correct way to do it is by driving the motor with a variable width 12V square wave and I'm sure you can buy simple circuit boards from eBay for a few dollars to do this and they will work and you will have less breeze and all will be lovely... unless it catches fire!
The problem is that some motors have an internal fan blade attached to the main rotor, this fan provides cooling air for the motor and if you reduce its speed it may not drive enough air through the motor to cool it, hence the fire risk. Without knowing more about the motor I cannot assess that risk.
I would probably do it but I would run a series of tests first to produce a record of how hot the motor becomes:
Let the fan run for one hour then record ambient temperature and motor temperature.
Apply the new controller and repeat the above test twice:
1 - with the controller set to 50%
2 - with the controller set to 10%
Use your judgement to decide whether all is OK.
Ensure all caravan doors and windows are closed for all tests as that is probably a worse case for the fan.
----
Edit:
WhenAreWeThere: a resistor!
You should know better, go and stand in the naughty corner for 10 minutes!
-- Edited by Mike Harding on Tuesday 11th of April 2023 01:01:21 PM
Cupie said
04:56 PM Apr 11, 2023
When I installed two bed head Camfro 12v fans several years ago, I added a motor speed control to each.
Although the fan came with 3 position speed selector I wanted to be able to adjust the speed to a very slow & quiet speed.
The speed controllers did this very well giving me infinite adjustments.
They cost <$10 for 3 from China of course. The mounting boxes cost more than the devices.
I tested them for noise & heating of both the controllers & fans. All OK.
I had a quick look at my records & couldn't find the details, but if you are interested give me a PM & I will look more deeply.
I have a 12v Rovin Ceiling Fan the only issue a single speed.
Is there a way to to replace the on /off switch with a speed regulator so slow the fan down ?
If you know how many amps, get a resistor from Jaycar, put in a 3 way switch also from Jaycar, high > low (resistor) > off.
I cannot find the amps this from rovin web page
Specifications:
Thanks for the offer, but I think I've got somewhere in my electrical bits box
Maybe: the correct way to do it is by driving the motor with a variable width 12V square wave and I'm sure you can buy simple circuit boards from eBay for a few dollars to do this and they will work and you will have less breeze and all will be lovely... unless it catches fire!
The problem is that some motors have an internal fan blade attached to the main rotor, this fan provides cooling air for the motor and if you reduce its speed it may not drive enough air through the motor to cool it, hence the fire risk. Without knowing more about the motor I cannot assess that risk.
I would probably do it but I would run a series of tests first to produce a record of how hot the motor becomes:
Let the fan run for one hour then record ambient temperature and motor temperature.
Apply the new controller and repeat the above test twice:
1 - with the controller set to 50%
2 - with the controller set to 10%
Use your judgement to decide whether all is OK.
Ensure all caravan doors and windows are closed for all tests as that is probably a worse case for the fan.
----
Edit:
WhenAreWeThere: a resistor!
You should know better, go and stand in the naughty corner for 10 minutes!
-- Edited by Mike Harding on Tuesday 11th of April 2023 01:01:21 PM
When I installed two bed head Camfro 12v fans several years ago, I added a motor speed control to each.
Although the fan came with 3 position speed selector I wanted to be able to adjust the speed to a very slow & quiet speed.
The speed controllers did this very well giving me infinite adjustments.
They cost <$10 for 3 from China of course. The mounting boxes cost more than the devices.
I tested them for noise & heating of both the controllers & fans. All OK.
I had a quick look at my records & couldn't find the details, but if you are interested give me a PM & I will look more deeply.
Or you could just do a google search.