Masterplug MVA1200 1200mA Mains Multi-Voltage Adaptor £5 @ Amazon  (free delivery £10 spend/prime)
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Masterplug MVA1200 1200mA Mains Multi-Voltage Adaptor £5 @ Amazon (free delivery £10 spend/prime)

27
Found 29th Nov 2014
I as looking for a decent multi-voltage adapter to run some 3v battery operated led lights. I saw a Masterplug one in Argos for £10.99. So I had another look around for the same model and its £5.00 in Amazon.

It outputs 3, 4.5, 5, 6, 9 + 12V and has a set of tips to suit most devices.This is a 1.2a/1200ma output so more than enough juice to run just about anything the kids get for Christmas.

Sold and fulfilled by Amazon so p&p applies if not bringing your order up to £10 or more but qualifies for prime next day delivery )free trial for a month if you haven't had it in the last year) or you could do what I did and throw in an 8 pack of Digimax 1100mah AAA rechargeable batteries for £8 (mostly 5* rating, some 4* but nothing below that)..

27 Comments

hot

These are regulated, so give out the voltage they state, some cheaper universal psu's are not regulated and the voltage can go up wildly..

Looks great! Thanks

Hot!

I'm sure that the 1200ma is only available at the lower voltages and the higher the voltage the less current is available.

Original Poster

worthinger

I'm sure that the 1200ma is only available at the lower voltages and the … I'm sure that the 1200ma is only available at the lower voltages and the higher the voltage the less current is available.



Its usually the other way round and the lower voltages output a lower current (not voltage) like this one from Maplin.

I need a replacement power cord got my baby monitor. the original outputs 9v at 600mA

Will this work? don't want to buy if it'll break the monitor. Cheers.

Dam, price has just increased to £9.99

Bit of an idiot, I have a DNS320 NAS that I need a replacement power supply for. Label on the back states 12V, 4A, so this wouldn't work would it?

Qman

Dam, price has just increased to £9.99



Still £5, you just need to click on "Other buying options" and choose "Amazon"

morpheus

Still £5, you just need to click on "Other buying options" and choose … Still £5, you just need to click on "Other buying options" and choose "Amazon"



Thanks, the price went up to £10.99 after I posted but now back to £5. Got two

Bought this last few days.. So far so good

Handy item, thanks OP

Comment

dirtyfrog

Bit of an idiot, I have a DNS320 NAS that I need a replacement power … Bit of an idiot, I have a DNS320 NAS that I need a replacement power supply for. Label on the back states 12V, 4A, so this wouldn't work would it?



No it wouldn't. Your NAS would try and grab more power than this gives out, and you'd end up ruining the power pack. In fact, I doubt it would even power it at all

Comment

morpheus

I need a replacement power cord got my baby monitor. the original outputs … I need a replacement power cord got my baby monitor. the original outputs 9v at 600mAWill this work? don't want to buy if it'll break the monitor. Cheers.



Im pretty certain you'd be fine, the monitor wouldn't only pull as much currant as it needs. Can someone 100% confirm?

meathane

CommentIm pretty certain you'd be fine, the monitor wouldn't only pull as … CommentIm pretty certain you'd be fine, the monitor wouldn't only pull as much currant as it needs. Can someone 100% confirm?



It'll be fine. Monitor will pull 600mA. The supply can handle 1200mA.

p.s Great find. Have some heat.

meathane

CommentNo it wouldn't. Your NAS would try and grab more power than this … CommentNo it wouldn't. Your NAS would try and grab more power than this gives out, and you'd end up ruining the power pack. In fact, I doubt it would even power it at all



Indeed, the 12v would significantly drop as the load tries to demand more current than the PSU can supply (V is inversely proportional to I)

Cheers methane and Rab88

Original Poster

The higher the current the better. As Rabb88 and meathane have said, the device will only pull as much current as it needs from the adapter. Its when you use a lower current than required that you start to have problems. Some devices won't even turn on if the current isn't high enough.

V=IR

Regarding the amperage, someone listed them under the 'Questions & answers' section of the item:

The 3.0 Volt / 4.5 Volt and the 5.0 Volt, are rated at 1.2 Amps. The 6.0 … The 3.0 Volt / 4.5 Volt and the 5.0 Volt, are rated at 1.2 Amps. The 6.0 Volt and the 9.2 Volt are rated at 1.0 Amp. The 12.0 Volt is rated at 0.9 Amp.

Also worth noting that a few devices use AC power so check if you're replacing a faulty transformer with another. If using this make sure the device is dc (nearly all are but don't assume). I had a netgear router that used AC 12v and I failed to notice and plugged in another very similar Netgear powersupply from a nearly identical router and blew the router up.I should have known better



Edited by: "spannerzone" 30th Nov 2014

Whilst on this subject.... for the 2nd time now I've had another Chinese PSU almost come a cropper, both PSU's shipped with cheap Chinese products (the products themselves are absolutely fine), the 1st 12v 1Amp psu set on fire whilst we where out, but put itself out inside the case, took out a row of ganged sockets and the 13amp fuse..... just checked another recent Chinese PSU 5v 500ma, using it as I don't have and alternative, been fine for a week but unplugged to check, casing had cracked and some sticky goo was leaking out plus one pin was loose.... Very weary of using the Chinese supplied stuff, these Masterplug jobbies for a fiver will give a little piece of mind!

mickrick

Its usually the other way round and the lower voltages output a lower … Its usually the other way round and the lower voltages output a lower current (not voltage) like this one from Maplin.



No. you're not correct: 900mA available at 12v with this object.

Original Poster

These are "temporarily out of stock" but amazon are still taking orders. I've just ordered another 2. They're excellent value for money.

Plugged mine into (previously mentioned) baby monitor and got a puff of smoke and a burning smell our of it....

Fortunately the baby monitor is still working with another power cable but not sure why the above would happen. Now scared to use it with anything else in case it wrecks it so tempted to send mine back.
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