29 Mar
2017
29 Mar
'17
8 a.m.
Hi folks,
The PSU for my Executel 8085 system is an Astec AC8151-01 40W 5A unit that
puts out +5/+12/-12V. A while back somone suggested using an ATX PSU in its
place which TBH I'd forgotten about untl I saw a breakout board that you
plug a 20 or 24 pin ATX supply into and it terminates each rail in whatever
you choose to solder in. ukp8, rude not to :)
My only worry is an ATX PSU is capable of putting out a lot more than 5A if
it goes wrong so I'd like to protect each rail with an appropriate fuse.
Any downsides to resettable polyfuses?
Cheers,
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
www.binarydinosaurs.co.uk
8:36 a.m.
On 29 March 2017 at 16:24, Systems Glitch <systems.glitch at gmail.com> wrote:
If you hit them hard enough, they'll sometimes
permanently open, which is
desirable anyway but does require rework. I don't remember how they stack
up speed-wise, I'm sure it's in the datasheets.
I don't mind that, better rework that distribution than whatever's been
belted. I didn't know resettable fuses existed until I accidentally zapped
a Raspberry Pi by dragging it under my metal iMac. That's got a 2A polyfuse
and it was back in service 30 mins later.
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
www.binarydinosaurs.co.uk
9:40 a.m.
On Wed, Mar 29, 2017 at 9:24 AM, Systems Glitch via cctalk <
cctalk at classiccmp.org> wrote:
They're not very fast. They're comparable to a slow-blow fuse.
Any downsides
to resettable polyfuses?
If you hit them hard enough, they'll sometimes permanently open, which is
desirable anyway but does require rework. I don't remember how they stack
up speed-wise, I'm sure it's in the datasheets.
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