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Re: What rheostat do I need? [message #370075 is a reply to message #370074] |
Thu, 07 July 2022 10:00 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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You do not want a rheostat. That is very old inefficient technology. A Pulse Width Modulator is the current best practice. (Google "pulse width modulator" on wiki for technical and operational information.)
EBay "12V pulse width modulator" to find appropriate devices. For your use most any one will work. There are two basic types you will be interested in. One has the potentiometer mounted on the circuit board, the other has the potentiometer on wire leads so the control can be mounted remotely to the device. Which one you want will be determined on the mounting method.
On eBay you can also search for "12v pwm controller". That should provide the same results.
The "rheostat" listed will not handle the current needed. I haven't done the math but I believe none of those listed would be the correct ohm value.
Please ask more questions if needed. I have 5+ of these installed on mine for various purposes.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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[GMCnet] Re: What rheostat do I need? [message #370078 is a reply to message #370074] |
Thu, 07 July 2022 12:44 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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Yes that device will easily operate your fan. The only consideration is the mounting. Some of these are not suitable for a thicker panel.
Larry wrote on Thu, 07 July 2022 10:22
> midlf wrote on Thu, 07 July 2022 10:00
>> You do not want a rheostat. That is very old inefficient technology. A Pulse Width Modulator is the current best practice. (Google "pulse
>> width modulator" on wiki for technical and operational information.)
>>
>> EBay "12V pulse width modulator" to find appropriate devices. For your use most any one will work. There are two basic types you will be
>> interested in. One has the potentiometer mounted on the circuit board, the other has the potentiometer on wire leads so the control can be
>> mounted remotely to the device. Which one you want will be determined on the mounting method.
>>
>> On eBay you can also search for "12v pwm controller". That should provide the same results.
>>
>> The "rheostat" listed will not handle the current needed. I haven't done the math but I believe none of those listed would be the correct ohm
>> value.
>>
>> Please ask more questions if needed. I have 5+ of these installed on mine for various purposes.
>
> Thanks Steve, How about this?
>
> https://www.amazon.com/BOJACK-Controller-Dimmer-Control-Switch/dp/B09P6CMRC9/ref=sr_1_45?gclid=CjwKCAjwiJqWBhBdEiwAtESPaIB_9v-ssgpi_3tx76fHnZVGWA-a8-X
> SsVYQUD1hig57HMAKLVPlzRoCu6QQAvD_BwE&hvadid=409997657456&hvdev=c&hvlocphy=9019332&hvnetw=g&hvqmt=e&hvrand=6712530865257829960& amp; amp;
> amp;hvtargid=kwd-320046497276&hydadcr=24630_11410023&keywords=12v+pwm+speed+controller&qid=1657206905&sr=8-45
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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Re: What rheostat do I need? [message #370088 is a reply to message #370074] |
Fri, 08 July 2022 07:12 |
jhbridges
Messages: 8412 Registered: May 2011 Location: Braselton ga
Karma: -74
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Senior Member |
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You might also consider a single fixed resistor to get a lower fixed speed.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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[GMCnet] Re: What rheostat do I need? [message #370089 is a reply to message #370074] |
Fri, 08 July 2022 07:12 |
gmc-email-list
Messages: 124 Registered: February 2019
Karma: 2
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Senior Member |
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You might also consider a single fixed resistor to get a lower fixed speed.
--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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