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Dean
30th November 2005, 04:39 PM
Just requiring a confirmation on this from anyone in the know.

I have a small electrical unit from the USA (not woodworking related) that has a power input stating it requires "9vDC 300mA".

I have an aussie power supply (one of those multi-voltage ones from Dick Smith) that says it delivers 600mA at 9v setting. I am assuming this will work ok for my U.S. electrical device. mA is basically the max current draw available isn't it? So if unit only needs 300mA, it will only draw 300 from the power supply correct?

Thanks.

echnidna
30th November 2005, 04:47 PM
yes

Dean
30th November 2005, 04:51 PM
awesome thanks

Termite
30th November 2005, 04:53 PM
Bugger, An eight minute instant fix, we didnt even get a chance for a hijack or a fight. :D

echnidna
30th November 2005, 05:07 PM
sorry but that:p :p :p :p

Dean
30th November 2005, 05:24 PM
Lol ;)

Wood Borer
30th November 2005, 05:25 PM
You should be OK unless in the unlikely event the device requires a regulated and filtered power supply. Usually the regulation and filtering is done in devices using Plug Packs.

Make sure the polarity is correct too Dean, again often there is protection in the appliance against wrong polarity but check anyway.

Dean
30th November 2005, 05:29 PM
You should be OK unless in the unlikely event the device requires a regulated and filtered power supply. Usually the regulation and filtering is done in devices using Plug Packs.

Make sure the polarity is correct too Dean, again often there is protection in the appliance against wrong polarity but check anyway.

Speak english :)

Ivan in Oz
30th November 2005, 05:32 PM
What WB might be saying is that there could be a 100Hz ripple on the DC Output
where the Septics are used to a 120Hz ripple.....:D ......:eek: ......:p

echnidna
30th November 2005, 05:35 PM
You need to hook the postive wires together and the negative wires together not positive to negative or you will let all the smoke out!

Wood Borer
30th November 2005, 05:35 PM
Sorry mate, time to go home.

Polarity - make sure the positive and negative are on the correct pins.

Regulation - most plug packs have a higher voltage than the nominated voltage when there is no load applied. When a typical load is applied in your case 300 mA then the voltage will drop to around 9 Volts.

A regulated plug pack will have a terminal voltage of 9V no matter what load you are drawing (within limits of course).

No real threat of me taking over your great reviews in AWR eh:D Well done, I'll read your latest review tonight in the shed. I finished reading Zed's article at 1AM this morning.

Dean
30th November 2005, 05:44 PM
the finer technicalities of electrical supply have never been my strong point, but thanks for the info :)

outback
30th November 2005, 07:41 PM
Electricity is dangerous. Get an electrician to do all this for you. Never attempt to do anything without consulting a fully overpaid professional.


Let the smoke out, thats funny. :D

Dean
30th November 2005, 07:49 PM
Never attempt to do anything without consulting a fully overpaid professional.

LOL

Dean
30th November 2005, 07:54 PM
Actually I just found out it also takes 6xAA batteries as an alternative :rolleyes:

Wood Borer
1st December 2005, 10:54 AM
Dean,

You have been secretive about the equipment you are powering. Any reason?:D

The only danger with what Dean is attempting is damaging his equipment (electrical equipment). It is all low voltage and low current so there is unlikely to be any risk of shocks or fire.

Termite
1st December 2005, 11:03 AM
Actually I just found out it also takes 6xAA batteries as an alternative :rolleyes:

What's that in metric? :rolleyes:

Dean
1st December 2005, 12:28 PM
Dean,

You have been secretive about the equipment you are powering. Any reason?:D

The only danger with what Dean is attempting is damaging his equipment (electrical equipment). It is all low voltage and low current so there is unlikely to be any risk of shocks or fire.

No reason. It's a guitar effects pedal unit :)

Dean
1st December 2005, 12:31 PM
What's that in metric? :rolleyes:

Beats me! :p :p :p

savage
1st December 2005, 02:08 PM
6.0 x AA.0:D

Termite
1st December 2005, 03:04 PM
6.0 x AA.0:D
:D :D :D :D :D :D

Iain
2nd December 2005, 09:23 AM
If the AA's are from the US make sure they are DC and not AC:p
Of course you could always use NiMH AA's which are fairly cheap now, I've seen 2300mah for $15 a set of 4, cheaper on ebay.

Dean
2nd December 2005, 11:41 AM
Yep I have about 20 NiMH AA's :)

outback
2nd December 2005, 05:53 PM
If the AA's are from the US make sure they are DC and not AC:p
Of course you could always use NiMH AA's which are fairly cheap now, I've seen 2300mah for $15 a set of 4, cheaper on ebay.


DOn't be silly, all you have to do is put them in upside down rouind the wrong way.

MathewA
2nd December 2005, 11:26 PM
Bugger, An eight minute instant fix, we didnt even get a chance for a hijack or a fight. :D



Oh what the heck lets start a fight anyways. Termite - YOU CALL YOURSELF A WOODWORKER!:eek:

Termite
3rd December 2005, 06:46 AM
Oh what the heck lets start a fight anyways. Termite - YOU CALL YOURSELF A WOODWORKER!:eek:

Do I! :eek: I'm more of a potter about in the shed making stuff ups type of person. :D
On second thoughts, there's a few of us like that here, so maybe I am after all. :o