neilpercy
Posts: 14
Joined: Mon May 28, 2012 11:37 am

230V>5V power module

Thu Jan 04, 2018 3:43 pm

Hello All,

I've looked into this before but never found with (I think?) I am looking for....

I would like to use a mains voltage converter, 230V UK, to 5V (or 5.2V) to use inside an enclosure to power a Pi Zero W, ultimately to use for a remote access central haeting controller project, a bi like this https://www.youtube.com/watch?v=Guhf7eohl98 , or this https://www.element14.com/community/com ... er-project

Ideally I would like to buy a module rather than take a Plug adaptor apart, ideally with screw terminals for the 230V (fused) input (I don't want to have to install a plug socket just for the Pi (there's power for the controller there already)).

I have found some modules at RS/Farnell etc but they all seem quite pricey compared to a Plug style PSU - https://uk.rs-online.com/web/p/products ... lsrc=aw.ds
and some at stupid money(>£400).

I'm just not sure that I'm looking for the right thing....?

Any pointers much appreciated.

Cheers, neil

gordon77
Posts: 4244
Joined: Sun Aug 05, 2012 3:12 pm

Re: 230V>5V power module

Thu Jan 04, 2018 5:47 pm

The RS psu says £20.78 not £400.

Maybe this one, although maybe larger than you want..

https://uk.rs-online.com/web/p/embedded ... s/7703248/

neilpercy
Posts: 14
Joined: Mon May 28, 2012 11:37 am

Re: 230V>5V power module

Thu Jan 04, 2018 8:22 pm

gordon77 wrote:
Thu Jan 04, 2018 5:47 pm
The RS psu says £20.78 not £400.
no, but this one is !! - https://www.tu-eshop.com/230VAC-to-5V-1 ... ply-Module - Actually, I'm not sure what currency that is, I had presumed Euros but my browser doesn't display whatever it is properly.

(sorry, didn't express myself very well in the first post).

Thanks fort the input gordon, I was hoping to find something like 'base' board that they use in a regular plug PSU.

cheers, neil

pcmanbob
Posts: 7150
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Location: Mansfield UK

Re: 230V>5V power module

Thu Jan 04, 2018 8:54 pm

You could always buy a plug type psu and simply take it apart you often find there are wires connecting the PCB to the plug part so you can simply un-solder them. just be aware of the dangers of running an un-cased psu as the PCB will have mains on the tracks.
if you have the room you could always re-case the PCB in a small plastic project case.
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HermannSW
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Re: 230V>5V power module

Thu Jan 04, 2018 9:02 pm

neilpercy wrote:
Thu Jan 04, 2018 8:22 pm
... Actually, I'm not sure what currency that is, I had presumed Euros but my browser doesn't display whatever it is properly. ...
I just pasted "₹450.00 in $" into google and got this:
450 Indian Rupee converts to 7.10 US dollar
⇨https://stamm-wilbrandt.de/en/Raspberry_camera.html

https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/github_repo_i420toh264
https://github.com/Hermann-SW/fork-raspiraw
https://twitter.com/HermannSW

mattmiller
Posts: 2115
Joined: Thu Feb 05, 2015 11:25 pm

Re: 230V>5V power module

Thu Jan 04, 2018 11:33 pm

In the interests of your safety - you really don't want to be mixing mains voltages inside the same enclosure as a Pi

neilpercy
Posts: 14
Joined: Mon May 28, 2012 11:37 am

Re: 230V>5V power module

Fri Jan 05, 2018 3:26 pm

mattmiller wrote:
Thu Jan 04, 2018 11:33 pm
In the interests of your safety - you really don't want to be mixing mains voltages inside the same enclosure as a Pi
Hi Matt, I don't mean to be flippant but could you explain why ? I respect mains electricty and fully understand the dangers when mishandled but I cannot understand why a PSU board properly wired would cause an increased risk inside an enclosure with a Rasp Pi ??

neil

mattmiller
Posts: 2115
Joined: Thu Feb 05, 2015 11:25 pm

Re: 230V>5V power module

Fri Jan 05, 2018 3:43 pm

Because you would have mains components next to the RaspPi - its really not that hard for a small error to cause fatal results.

in most countries - such a device would require certification and testing (for good reasons)

Much (by many orders of magnitude) safer to use a certified mains PSU and connect at the 5V DC level

Note

This is a recurring request on this forum and almost all the "old-timers" take it in turns to warn people from doing it :)

Imagine someone helped you with your quest and then things went very badly wrong....... :)

sparkie777
Posts: 121
Joined: Tue Nov 27, 2012 4:37 am

Re: 230V>5V power module

Fri Jan 05, 2018 4:15 pm

what speaks against:
pcmanbob wrote:
Thu Jan 04, 2018 8:54 pm
You could always buy a plug type psu and simply take it apart you often find there are wires connecting the PCB to the plug part so you can simply un-solder them.
?

- it's cheap
- it's secure
- needs no plug socket
- it's tiny size

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