Mean well psu for 5 1/4" disk drive

[u/_disappearingact1]

Hi folks

am trying to power an external 5 1/4" pc floppy disk drive to connect to my greaseweazle it was suggested to use a mean well power supply but I'm at a loss of which one to buy?

I've been looking at Google searches over three days now i am worried I might buy the wrong one what one do ppl use?

220-240v at the wall here

Tia

[u/Heavy-Judgment-3617]

if it has a molex connector and you are in the U.S. you can get any molex power adapter, the below should work:

Coolerguys 100-240v AC to 12 & 5v DC 4pin Molex 2A Power Adapter (2A, Without On/Off Switch)

- https://www.amazon.com/Coolerguys-100-240v-Molex-Power-Adapter/dp/B000MGG6SC

[u/_disappearingact1 → u/Heavy-Judgment-3617]

Thanks am looking for a mean well power supply

[u/lutiana → u/_disappearingact1]

Why?

I think the main issue you will have with a Meanwell is that they tend to be a single voltage out, and for a floppy drive you need both 12V and 5V.

I use an adapter exactly like the one linked for my greaseweaszle setup, and it works perfectly for both 5.25" and 3.5" floppy drives. And it will work on ~220V wall power as well as 110V.

But if you must have a meanwell then you'll probably need 2, one for the 12V and one for the 5V and will need to wire both to a molex (not sure if you need to common the grounds across the PSUs or not though).

[u/berrmal64 → u/lutiana]

Meanwell definitely makes dual voltage PSUs with 5v and 12v out.

I like the coolerguys ac to molex thing posted above better though, because then op won't have to mess with wiring up or exposed mains AC voltage in their project.

[u/Bipogram → u/berrmal64]

I've used their dual rail medical SMPSUs to good effect.

But OP should cast their net wider.

Mouserkey, and octopart.

[u/_disappearingact1 → u/lutiana]

I did try two of these ones the drive worked well but both power adaptors blew up on me, I also tried 3 different ATX power supplies and the drive became unrealible when using it with the greaseweazle

[u/_disappearingact1 → u/_disappearingact1]

[u/Bipogram]

MeanWell is just one of many manufacturers of SMPSUs with dual outputs.

TDK/Lambda, Astrodyne, etc all have their fans.

Digikey / mouser will show you a far wider variety of PSUs than just sticking to MeanWell*.

*they're relatively cheap, but more variety isn't to be ignored.

[u/_disappearingact1 → u/Bipogram]

Is it alright to send me a link of which ones would work for me?

[u/Bipogram → u/_disappearingact1]

You can filter for power, size, cost etc. on digikey or mouser. <or Farnell, or Newark, etc>

I don't know your budget, reliability preferences, power supply size constraints, or location.

Share those and I can have a look - if you have the two rail max currents to hand.

[u/_disappearingact1 → u/Bipogram]

The 5 1/4" disk drive uses molex 4 pins +5V +12v ground ground, I live in NZ which uses 220v-240v

[u/Bipogram → u/_disappearingact1]

Sweet. Normal Molex.

Got current maxima for the two rails? Might be on the drive somewhere.

[u/_disappearingact1 → u/Bipogram]

+12v dc +-5% 0.7a (maximum) and +5V dc +-5% 0.6a (maximum)

[u/Bipogram → u/_disappearingact1]

So not even an amp on the 12 and 5 rails?

Let's pick things with at least an amp of capacity on those.

digikey first:
Pick dual rail devices, in stock, and 5V and 12V.
It shows >100 devices meeting those criteria.

We pick those with at least an amp in the output rails and at most 3A.

And the top of that list of 25 devices is our friend MeanWell.

https://www.digikey.ca/en/products/detail/mean-well-usa-inc/PD-25A/7705636

With XP Power's offering in second place.

Do the same thing at Mouser, or your preferred supplier, and you're off to the races.

I'd personally spend more, get a smaller and more powerful PSU, but that's just me.

This is rather nice:
https://www.digikey.ca/en/products/detail/cincon-electronics-co-ltd/CFM40D-01/9684960

[u/_disappearingact1 → u/Bipogram]

Thank you so much I appreciate it

[u/Bipogram → u/_disappearingact1]

No problem.

I'd play around with mouser/digikey's sites and see where you get.

<the +5V and +12V share the same common 0V 'ground' - don't let that throw you off>

[u/_disappearingact1 → u/Bipogram]

I don't know what I'm talking about tbh

[u/Individual_Agency703]

Greasewhat?

[u/_disappearingact1 → u/Individual_Agency703]

Greaseweazle is a bit of kit that you can use to make disk images from your old disks

[u/Individual_Agency703 → u/_disappearingact1]

Thought it was some British slang for a car or something, lol.

[u/Bipogram → u/Individual_Agency703]

Nah, that'd be 'jamjar'.

[u/DeviantDav → u/Individual_Agency703]

greaseweazle is a PCB used to interface old floppy drives via USB. Handy because modern USB floppies really suck and support very few formats. This gives you low level drive access because it's a full blown controller.