ATX PSU With QL

Nagging hardware related question? Post here!
User avatar
robheaton
Site Admin
Posts: 281
Joined: Fri Nov 19, 2010 5:50 pm
Location: Ormskirk, UK

ATX PSU With QL

Postby robheaton » Wed Jun 12, 2019 8:06 pm

Came across these videos today showing a QL being powered with an ATX Power Supply.

https://www.youtube.com/watch?v=IxedNWQ7VvM
https://www.youtube.com/watch?v=l8P8wsdjCFo&feature=youtu.be

Has anyone on here tried this?


Current Retro Hardware :-
ZX80 Clone, ZX81 + Chroma + ZXPand + Zeddynet, Just Speccy 128, Speccy 48K, Spectrum 128 +2, BB Sinclair QL + Trump Card Clone, Aurora + Super GC + QubIDE.
BBC Model B 32k + Datacenter + Z80 Tube, BBC Master 512, BBC Master 128k + Datacenter & 6502 Tube.
Amiga 1200, Commodore 64 x3, Commodore 128, C64 Ultimate, VIC 20, Sega Megadrive, Mega CD & 32X.
User avatar
Artificer
Chuggy Microdrive
Posts: 57
Joined: Fri Nov 24, 2017 8:43 am

Re: ATX PSU With QL

Postby Artificer » Wed Jun 12, 2019 8:17 pm

I've powered an Aurora board QL from an ATX power supply but never a vanilla motherboard.

Cheers


User avatar
Dave
SandySuperQDave
Posts: 2390
Joined: Sat Jan 22, 2011 6:52 am
Location: Austin, TX
Contact:

Re: ATX PSU With QL

Postby Dave » Wed Jun 12, 2019 8:47 pm

Don't do this.


User avatar
Problemchild
ROM Dongle
Posts: 1
Joined: Mon Sep 04, 2017 3:19 pm

Re: ATX PSU With QL

Postby Problemchild » Tue Jun 18, 2019 10:10 pm

?Um yeah it works but rather a bodge to say the least
Probably better in terms of making a viable permanent job would be to take the 12 V from the PSU use one of those switch mode modules to bring that
down to say 7-8 V (The higher voltage is to allow for the line to sag when under load!) and maybe another switch mode module for the Vin- to 5V then generate the +- 12 V voltages from either a Max232 or the like to get the voltages to drive the +- 12 volts for the RS232 and the Modulator not a lot of current is required for this!!

All depends on what needs you have ....Might be better to fix the PSU if that is an issue.
Also those transistors he mentions are in fact 78l/79l regulators



Who is online

Users browsing this forum: No registered users and 6 guests