#1 
Posted 08 May 2022 - 09:44 AM
I'm planning happening investing in a fan for the back of my Meade 12.5" Starfinder in the near term. Clearly I need a mode to power it. My budget is very stiff.
I induce a boxwood of 'unneeded' 9v batteries at the firm (we replaced the dope detectors, and the fres ones don't use 9v batteries), and at to the lowest degree initially it would be nice if I could use something like a 9v battery instead of having to buy up a rechargeable power pack of some sort. The specs for the fan say that the operating voltage is 6v-14v at 0.05A.
Can I get away with just attaching the battery to the leads from the fan?
#2
Posted 08 Crataegus laevigata 2022 - 10:38 AM
Yes. They spin a little slower but that International Relations and Security Network't needfully a bad thing. (They'll spin slower if they'rhenium adaptable speed fans).
#3
Posted 08 May 2022 - 10:56 AM
Paul,
Give thanks you.
That's what I expected, but I just wished-for to make convinced.
#4
Posted 08 May 2022 - 10:59 AM
An alkalescent 9V battery has a capacity of about 560 milliamp-hours. A fan drawing 50 milliamps will therefore run for some 11 hours.
#5
Posted 08 English hawthorn 2022 - 11:05 AM
I accustomed power the fan on my XT10 with a 9v battery. I switched to using AA batteries instead because of how fast I was going through 9v batteries.
#6
Posted 08 May 2022 - 12:41 P.m.
<<snip off>>
Can I catch away with just attaching the battery to the leads from the fan?
Sure you can, but for the sake of the children, don't rent it just hang out at that place for completely the World to see.
http://www.alliedele...CFQZbfgodx3QAZg
#7
Posted 08 May 2022 - 01:15 PM
When you run through the batteries you take over, you may want to do something like this. In the weeklong runnel the cost will equal out and the you'll never bear to worry about flying tabu of power during a session. The red/black pair can center of the pic powers the fan. The connected leads connected the OTA at top proper of the pic powers the subaltern dew smoke. The 12v 5aH rechargable deep cycle battery's fixtured onto the lowborn skirt. The encoders are battery-powered past the Nexus DSC battery.
Emended past havasman, 08 May 2022 - 01:16 PM.
#8
Posted 08 May 2022 - 03:19 PM
My plan down the road is something a little more upmarket, but right now sixpenny and light are priorities.
Thanks for the suggestions. I will probably look into A battery holder (whitethorn even check Radio Shack (if I can find one) for the take off if information technology works out to be cheaper than adding cargo ships to a $2 item.
#9
Posted 09 May 2022 - 12:10 PM
I definitely engender going cheap so I would suggest to just make started and you'll learn what works and what will need improvement or tweaking. I'm not predestinate if you also need to tycoo dew heaters but that is a vast priority here in the south. Once I invested in a dew heater, I used the dew heater auxiliary power port to power my fan. I also purchased a cheap voltage regulator and made-up it into a project box. In reality, I run the rooter on full power most of the night anyway so I could possess just run the top executive directly but information technology's a nice option to have nevertheless.
Lastly, like in past threads about wiring, ability, etc., I would highly recommend switching to anderson powerpoles as soon as you can to provide the most flexibility and the easiest connections. Just this past weekend, I severed all fag plugs and sockets and wired in the powerpoles.
Edited by Quest, 09 May 2022 - 12:15 PM.
#10
Posted 10 English hawthorn 2022 - 06:14 AM
The battery issues undergo been covered
I didn't see much about the particular fan... Arm armorial bearing fans are more likely to have vibration issues than ball bearing or magnetic bearing fans...
Jon
#11
Posted 10 May 2022 - 10:38 AM
With regards to fans, which specific fans would the great unwashe suggest? That specific fan was mentioned by someone on this site as what they used.
I would prefer to mount a single winnow (preferably under $10) behindhand the mirror. I know Rob Teeter suggests a twain of side-by-side boundary level fans for scopes my size, but I'm non sure how I could mount them to the present tube without seriously compromising the tube integrity.
#12
Posted 10 May 2022 - 03:52 PM
I'm planning on investment in a fan for the back of my Meade 12.5" Starfinder in the near term. Clearly I need a way to power it. My budget is same tight.
I have a box seat of 'spare' 9v batteries at the house (we replaced the smoke detectors, and the new ones don't use 9v batteries), and at least at the start it would equal nice if I could use something like a 9v battery instead of having to buy a rechargeable power bundle of some sort. The specs for the fan say that the operative voltage is 6v-14v at 0.05A.
Can I incur away with just attaching the battery to the leads from the fan?
I took my spread out of a computer tower. it has a three speed switch, (which is great to throw). The fan needs 12 volts. I used to run the fan with four AA batteries @ 1.5v each for a total of 12 volts, but found over clock they only last trinity or four Roger Sessions. I was told Here happening CN that "D" Mobile phone batteries last some longer, (and they do).....prob like a few months!
So, I made a bearer that holds 8 D-Electric cell batteries and I only have to buy 8 of them every few months, (at the dollar store), and I am good to go.
An perceptive brother of mine uses those really big batteries with the palm on information technology and he says he recharges it and it lasts rattling really long.
#13
Posted 12 May 2022 - 03:50 PM
I had a scope with a single 80mm 12V sports fan on the spinal column, and ran it with a 9V battery.
It wouldn't fifty-fifty escape one night for a couple reasons:
--the battery lost office when it got cold, and summer temps are in the 40s where i honor.
--the fan drew sufficiency power to flummox the battery beneath minimum voltage too rapidly.
In the heat of the good afternoon, the close day, the fan would return on as the shelling warm up.
So, if you can, set out a small battery pack at a hobby store like Frye's Electronics or similar and power the buff with
6 to 8 "D" Cells.
Interestingly, you can get a secure 7ah rechargeable battery for <$15, That may be cheaper than "D" cells.
Run 12v Dc Fan on 9 Volt Battery
Source: https://www.cloudynights.com/topic/499650-can-i-power-a-fan-with-a-9v-battery/
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