DiY 2 Fan with 1 adptor

[sunny03]

Hi guys

i have 2 fans and a adptor

fan spec : DC 12v 0.90A

Adptor : DC 12v 1.5A

Here is the question .

Can i connect 2 fan to this adptor ?? If possible how to connect it ???

series or paraller?? 2 fan added up will be 1.8A will my adptor burn out

or i have to get a DC 12V .090A adptor ??

[Clownfish]

u will need a adapter that can support more than 1.8A as u will be connecting the fans in parallel

otherwise, the fans wont get enuff current to turn at their max speed which defeat the purpose

[rockfish]

yah!! if u have tried it, u will realised that the fan will be turning too slowly as the current is not enough. paralle connection is rite ..

[sunny03]

wat about series ???

[yus75]

total amp wil be 1.8A.....imo better get someting higher than 1.8......perhaps 50% more....

[reeflobang]

Better get those rated as high as possible as you are going to turn them on 24x7 right? Mine is rated 1000mA and has been running for a year, 24x7. Only S$10 from SL basement.

Serial / parallel? I just join red to red, black to black (fan wires) for the two fans I have and connect direct to the adaptor.

[sunny03]

if i use 1.8A for 1 fan do you think my fan will burn out ???

i guess will

[Clownfish]

if i use 1.8A for 1 fan do you think my fan will burn out ???

i guess will

nope it wont

the fan onli draws the current it needs... not the adapter drive the current to the fan

[acedophin]

Hi,

No problem to join it parallel, your fan will still have 12V supply to each fan. Dun join in series because each fan will have only 6V with current being 1.5A. If you want to use 1 fan only, to counter the current, just put a resistor will solve the problem. After your DIY fan, I am pretty sure you will ask for DIY water top up because your tank water will evaporate much faster with the 2 fans blowing.

[neokn]

Hi,

No problem to join it parallel, your fan will still have 12V supply to each fan. Dun join in series because each fan will have only 6V with current being 1.5A. If you want to use 1 fan only, to counter the current, just put a resistor will solve the problem. After your DIY fan, I am pretty sure you will ask for DIY water top up because your tank water will evaporate much faster with the 2 fans blowing.

Definitely, he will be doing a DIY topup system. Just image on a fine day and 1 fan blowing with only 3.5' x 1' surface, I need to top up 1 x 1.5L bottle and on a hot day I'll need to top up 2 x 1.5L. Damn the water vapories too fast.

[sunny03]

hahah i top up every night

and till now i only use one fan cant seem to find 2A adoptor

[RockyBoy]

if i use 1.8A for 1 fan do you think my fan will burn out ???

i guess will

Your fan won't burn out. Adaptor current rating should be higher than the actual load requirement.

If the load requires 2.0amps, and your adaptor can deliver up to 1.8amps, your adaptor will heat up.

Also, always connect loads in parallel.

[neokn]

hahah i top up every night

and till now i only use one fan cant seem to find 2A adoptor

You can get 2A adaptor easily from SLS computer accessories shop. Last I check, the price is around $30/-.

[schema]

Your fan won't burn out. Adaptor current rating should be higher than the actual load requirement.

If the load requires 2.0amps, and your adaptor can deliver up to 1.8amps, your adaptor will heat up.

Also, always connect loads in parallel.

Agree!

Get a higer rated unit else risk meltdown of adapter or worse fire hazard.

Mike