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Fan voltage question

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#1 Alvin435

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Posted 18 January 2020 - 02:01 PM

Hi, I have a Orion fan that runs on 8 D batteries. Can it run off 12 volts and if it can is there potentially anything I need to be aware of. Thanks Alvin



#2 scadvice

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Posted 18 January 2020 - 02:07 PM

DC 12 volts will work fine as long as the D cells were in series which is very likely. Look on the fan housing as it should tell the voltage requirement.



#3 SteveG

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Posted 18 January 2020 - 02:28 PM

Hi, I have a Orion fan that runs on 8 D batteries. Can it run off 12 volts and if it can is there potentially anything I need to be aware of. Thanks Alvin

8 x 1.5 = 12, so yes. Most of those fans will work with between 6-12v DC.



#4 Bob4BVM

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Posted 18 January 2020 - 02:30 PM

Not critical.

These DC fans will usually start reliably at around 5V, and are certainly OK to 15V at least. So you can use on a car-powered setup as well.  

Fan speed will vary with voltage. I run mine at 12V for pre-cooling, then I step down to 8V during observing for less noise & no vibration.  Simple LM7808 circuit will accomplish that trick.

 

CS

Bob


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#5 Alvin435

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Posted 18 January 2020 - 02:36 PM

Thanks greatly appreciated 




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