240v AV to 12v AC 3amp Power Supply - unicorn?

[DSLiverpool]

Guys I have looked to no avail, can any PH tech gurus advise where to buy one from - the output plug doesn't matter

[jesusbuiltmycar]

Is for a Nest doorbell?

[DSLiverpool]

Sorry Toxic I did search CPC must’ve missed it.

It’s for the massage function on a la z boy chair

Replacing

[TonyRPH]

anonymous said:

[redacted]

These are all 240vAC to 12vDC although I didn't go past page 1.

The OP is wanting 240vAC to 12vAC

They are difficult to find - I've had a similar requirement myself (for a 12vAC 1A unit) - I did eventually find one on Amazon.

OP I found this one on Ebay it's 12vAC 5A which will be fine.

Edited by TonyRPH on Saturday 22 January 20:42

[DSLiverpool]

anonymous said:

[redacted]

Possibly - iscitv3 amp?

Cheers

I’ll run it past my spark, I’ve now seen an opportunity for la - z - boy power supplier sales

[colin79666]

Tried asking the retailer you got the chair from? La-z-boy point you there but if they are bust you can contact them direct: https://www.la-z-boy.co.uk/contact/spares/

[DSLiverpool]

colin79666 said:

Tried asking the retailer you got the chair from? La-z-boy point you there but if they are bust you can contact them direct: https://www.la-z-boy.co.uk/contact/spares/

I’ve spent ages looking at the maker / the states / online - it’s over 20 years old and they went DC about 15 years ago.

It’s a la z boy Oasis if you fancy a challenge.
The psu company doesn’t seem to exist now

[Neddy Sea Goon]

Have a look at door entry direct

Loads of intercom systems use 12v ac power, just use one of them , 3amp or higher will be fine

[DSLiverpool]

Neddy Sea Goon said:

Have a look at door entry direct

Loads of intercom systems use 12v ac power, just use one of them , 3amp or higher will be fine

Cheers 👍

[TonyRPH]

DSLiverpool said:

anonymous said:

[redacted]

Possibly - iscitv3 amp?

Cheers

I’ll run it past my spark, I’ve now seen an opportunity for la - z - boy power supplier sales

That's no good - it's only 3va(3w)

V*A=W - so 12v * 250mA = 3W

Therefore at 250mA it falls far short of the 3A rating the OP requires.

[eliot]

are you sure it’s faulty or non repairable? An an ac to ac adapter is going to be a simple transformer which never fail. I would be checking the continuity of the high and low voltage sides and if there’s a glass fuse inside it (which would only blow of there’s a downstream fault)

Doesn’t say it’s AC, but if it’s a transformer alone it would be (or cut the rectifier out)

https://www.wickes.co.uk/ELLUMIERE-Low-Voltage-Out...

Edited by eliot on Sunday 23 January 09:29

[DSLiverpool]

eliot said:

are you sure it’s faulty or non repairable? An an ac to ac adapter is going to be a simple transformer which never fail. I would be checking the continuity of the high and low voltage sides and if there’s a glass fuse inside it (which would only blow of there’s a downstream fault)

It’s knocking out 2.3v not 12v and getting too warm. It’s a sealed unit (I think) I’ll recheck

[eliot]

is 2.3v when it’s not plugged in? (no load) - does sound knackered.
i edited my post with a suggested psu

[DSLiverpool]

It’s 2.3v and too warm when not plugged into the chair. I got a good spark to confirm I hadn’t set the meter wrong!

[Tymb]

Quite a lot of lighting is 12vac,

https://www.tlc-direct.co.uk/Products/TLT50slash1....

https://www.lumenalights.com/shop/product/12v-wate...

[DSLiverpool]

Tymb said:

Quite a lot of lighting is 12vac,

https://www.tlc-direct.co.uk/Products/TLT50slash1....

https://www.lumenalights.com/shop/product/12v-wate...

Cheers guys - as long as it has 3amps welly ?

[Captain_Morgan]

Op I think you are searching for the wrong thing, 12v ac transformer gives a number of options

This in 50w guise should do the trick
https://www.lumenalights.com/shop/product/12v-wate...

Or these chassis mount transformers though you might want to budget for a case depending how it mounts to the chair 50 va’s is the minimum if you want a 3a output

https://uk.rs-online.com/web/c/power-supplies-tran...

[Captain_Morgan]

Just to add I might have overspec’d the va’s / w needed to get your output it’s been many years since I had to design ac psus

Whatever you choose use a 3a inline fuse on the output just in case…

[DSLiverpool]

I’ll post up more pics for context

[TonyRPH]

eliot said:

are you sure it’s faulty or non repairable? An an ac to ac adapter is going to be a simple transformer which never fail. I would be checking the continuity of the high and low voltage sides and if there’s a glass fuse inside it (which would only blow of there’s a downstream fault)

Doesn’t say it’s AC, but if it’s a transformer alone it would be (or cut the rectifier out)

https://www.wickes.co.uk/ELLUMIERE-Low-Voltage-Out...

Edited by eliot on Sunday 23 January 09:29

It is AC, you can see it printed on the transformer housing in the pictures. Also, at 12V 6A (72Va) output, that's damn good value for £24 !