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IGnosticAbhorI
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Registered: 11/06/04
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Ghettofied
#5588807 - 05/04/06 01:26 AM (17 years, 8 months ago) |
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Trying to make a stir plate, had a few questions.
Red = + Black = -
Correct?
I've got a computer fan, says DC 12V on it...The charged I found (got like 3), one says it has....
Input = 120V ; 60hz ; 6W Output = 4.5 DC450mA
I think that's the one NOT to use 
NEXT
Input = 120V ; 60hz ; 5.3W Output = DC 4.5V=600mA
Not really sure what ALL of it means...
Going to do some more reading and look for some other adaptors and such.
Any input would be much appreaciated...
I won't be plugging anything in or anything like that, not until I know exactly what i'm doing....
-Gnostic
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IGnosticAbhorI
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Registered: 11/06/04
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Hmmmmmmmmm......
Got kind of creative and used a 9v battery instead...works great 
If I can't find an adaptor or anything then i'll just go with the battery...Maybe put an lc on it once a day, just long enough to break up the mycelium really well...
Either way, 
-Gnostic
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DIRTYMAN
Jesusdon'tcomethrough thecotton.

Registered: 11/18/05
Posts: 18,558
Loc: CZ NIGGUH
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I got someone else to do it for me because I'm in the same boat as you. No clue about the electronic stuff, sorry 
Make sure you get a really strong magnet, cheapo radioshack ones won't cut it (believe me). I don't think it has to be exactly centered either, but the more it is the faster the fan goes.
-------------------- I'm racist. http://k-k-k.com/
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IGnosticAbhorI
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Re: Ghettofied [Re: DIRTYMAN]
#5588845 - 05/04/06 01:38 AM (17 years, 8 months ago) |
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I was going to use something from work to help me center it...
As for the adaptor part ...no idea what to do yet...
I was going to use the magnet from my old hard-drive...but...I don't know what it looks like ...So it's kind of difficult...hahah...All I know is what shape the magnet is...No idea which part it is, hahah 
-Gnostic
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DIRTYMAN
Jesusdon'tcomethrough thecotton.

Registered: 11/18/05
Posts: 18,558
Loc: CZ NIGGUH
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My buddy who made the stirrer also builds computers, and he had no clue that hard drives have magnets. He did however know that there are extremely tiny yet powerful magnets in some CD players, but even these with the cheap radioshack magnets don't do the trick. Anyone know a good magnet connect (no pun intended)?
-------------------- I'm racist. http://k-k-k.com/
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IGnosticAbhorI
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Re: Ghettofied [Re: DIRTYMAN]
#5588865 - 05/04/06 01:46 AM (17 years, 8 months ago) |
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Lol ...
Hmm...Do speakers have magnets?... ...
-Gnostic
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dysphoria
lost soul


Registered: 06/04/03
Posts: 1,651
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speakers do have magnets. in fact ive even attempted to harvest them from two aiwa subs that have gone out, but yet i was too lazy to throw out.
the problem is, i cant separate the two circular magnets from the metal base without crushing/destroying the intact magnet. =/
oh, and i tried harvesting a magnet out of my old hard drive, but it turns out that its a really weak magnet. western digital...of all things. i kinda expected a decent magnet out of a decent hdd maker.
-jb
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Akamatsu
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Registered: 01/29/06 
Posts: 285
Loc: Australia
Last seen: 2 years, 1 month
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Quote:
IGnosticAbhorI said: Input = 120V ; 60hz ; 6W Output = 4.5 DC450mA
Look for a transformer with a 12V DC (Direct Current as opposed to AC, Alternating Current) output, current (450mA in the one quoted) needs to be at least around 200mA.
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IGnosticAbhorI
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Re: Ghettofied [Re: Akamatsu]
#5589126 - 05/04/06 05:41 AM (17 years, 8 months ago) |
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Quote:
needs to be at least around 200mA.
What does the mA stand for?...
Thanks for that info. btw...Now I know what Ac/Dc meant on the bottom of that sewing machine 
-Gnostic
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purokogi
Don Pachi
Registered: 03/18/06
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Last seen: 17 years, 8 months
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Re: Ghettofied [Re: DIRTYMAN]
#5589130 - 05/04/06 05:46 AM (17 years, 8 months ago) |
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Quote:
DIRTYMAN said: My buddy who made the stirrer also builds computers, and he had no clue that hard drives have magnets. He did however know that there are extremely tiny yet powerful magnets in some CD players, but even these with the cheap radioshack magnets don't do the trick. Anyone know a good magnet connect (no pun intended)?
your friend who "builds" computers didnt know this? lol
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Akamatsu
Seeker

Registered: 01/29/06 
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Quote:
IGnosticAbhorI said: What does the mA stand for?...
Milliamps
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IGnosticAbhorI
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Re: Ghettofied [Re: Akamatsu]
#5589140 - 05/04/06 05:55 AM (17 years, 8 months ago) |
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Quote:
needs to be at least around 200mA.
What would be considered to much(mA)?....lol
-Gnostic
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Akamatsu
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Registered: 01/29/06 
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Quote:
IGnosticAbhorI said: What would be considered to much(mA)?....lol
The fan will only draw as much as it needs. So as long as there is enough, the current rating doesn't really matter.
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IGnosticAbhorI
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Re: Ghettofied [Re: Akamatsu]
#5589149 - 05/04/06 06:06 AM (17 years, 8 months ago) |
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*Begins the hunt*
Thanks for the help man!
-Gnostic
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IGnosticAbhorI
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So i'm basically looking around for....
Input = 120V ; 60hz ; 6W Output = 12V DC DC200mA (or lower)
Correct?
-Gnostic
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thenewguy05
The Mushroom Man


Registered: 02/11/05
Posts: 2,123
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exactly. input doesn't matter because you are in the US and all the input is going to be the same. output is what you will need to look at.
if you have a 12v DC fan you need a 12 volt DC output power source. 9 volt batterie works because it is a DC power and isn't 12 volts but will provide enough to spin the fan.
see what is in your wall is a alternating current or AC power, and what the ac addaptor is doing is transfering the ac power into dc.
sorry if i got to in depth but i'm an electrician at heart.
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Akamatsu
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Registered: 01/29/06 
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Quote:
IGnosticAbhorI said: Output = 12V DC DC200mA (or lower)
Correct?
Getting there. The DC only applies to the voltage (i.e. no DC before current rating), and I would recommend 200mA or higher, not lower. Most adaptors will have at lease that, so all you really need to look for is one with an output of 12 V.
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Atemi
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Registered: 05/01/06
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Last seen: 17 years, 7 months
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Re: Ghettofied [Re: Akamatsu]
#5589204 - 05/04/06 07:21 AM (17 years, 8 months ago) |
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Deleted: reason - need to get used to these forums lol
Edited by Atemi (05/04/06 07:21 AM)
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splifner180
Student


Registered: 03/24/06
Posts: 1,288
Loc: USA, East Coast
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Gnostic: First, your'e correct on the wiring but really, since it's DC, don't worry about it. If you hook it up backward it's roughly the same as putting batteries into a radio in the wrong direction. It won't work but it won't really hurt anything, either.
If your fan is 12VDC then you'll need a transformer with an output of 12VDC. You might be able to get it to spin with something lower but I wouldn't even bother if it was under 9VDC.
Stop by your local Rat Shack and ask if they have any spare adapters kicking around out back they'd be willing to give to you. Every store has a pile of them.
And don't worry about waiting until you know "exactly what you're doing." We're talking about low DC voltage and really low amperage. Just don't lick the contacts while it's plugged in. =)
Now on to the battery idea.
Each battery provides 1.5VDC so you'd need 9 batteries to make 12VDC. Figure that batteries cost roughly $0.50 each, give or take, so that's about $4.50 in batteries to provide 12VDC of power.
IIRC, your average battery offers something like 2000mah which is way of saying that it'll provide 2 amps of power for an hour. If your fan is sucking down, say, 200ma, then your batteries will provide about ten hours of power at 12VDC. Blowing about ten bucks for power for every day of service is ridiculous. Spend $15 if you absolutely must and get yourself an adapter. Again, Radio Shack.
And with all due respect to InvisibleAkamatsu, you want to find a supply with amperage equal or higher. Amperage is just the capacity to draw. So if you have a power supply that gives out 3 amps of power and your device only needs 1 amp, no problem at all. The three amp supply will only "give out" one amp. But if you need three amps of power and your supply only gives one amp, then you're screwed because the device will try to "pull down" more load than the supply can provide.
Again, you can ALWAYS go higher on amperage when it comes to power supply. The opposite is true for voltage -- never go higher, always try to match the correct number.
splif
-------------------- First Grow: Ecuador -> LC -> HPoo/Straw -> Monotub Build a Do-It-Yourself Magnetic Stirrer in thirty minutes with no money.
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skeletor
the dude
Registered: 09/06/05
Posts: 1,235
Loc: heaven on earth
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HAHAH i was going over all this electronic crap with splif last night on pm's. i was also wondering about the adapters. so far i found my way up to this old phone one 9 V 210 mA. i figure this is do the trick im going to try later today when i go grab the fan and magnet off someone. i also have a nokia cell charger output 3,7V / 340 mA. this one has less Volts but more mA... for the little i think i know the first one will work better. guess i'll tell you how it works later haha.
-------------------- im sorry about your mother. She was a terrible attrative woman. Get back to nature; hunting burgers and gathering fries.
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