Brad from Cheltenham,
Been after a QL for a while. Just nabbed one, bare bones, no PSU even and no guarantee of even works
vanpeebles says I just need a 5v power supply? Any pointer appreciated!
Cheers.
Ohai!
- vanpeebles
- Commissario Pebbli
- Posts: 2821
- Joined: Sat Nov 20, 2010 7:13 pm
- Location: North East UK
Re: Ohai!
Welcome! A good search of fhe forum is needed, I’m sure someone tried something similar and broke a QL. You can trim down a 3 pin fan connector to fit the socket.
- vanpeebles
- Commissario Pebbli
- Posts: 2821
- Joined: Sat Nov 20, 2010 7:13 pm
- Location: North East UK
Re: Ohai!
viewtopic.php?f=2&t=1231&start=10&hilit=replacement+psu
Might be handy, you can also try a wanted post in the wanted section for a proper PSU.
Might be handy, you can also try a wanted post in the wanted section for a proper PSU.
Re: Ohai!
You need a power supply that can provide 9v DC with at least 2A, and 12-15V AC (this voltage is rectified and regulated in the QL to provide +12V and -12V for the serial ports, video circuitry and bias for the Microdrives)
Fan connectors do seem to work after a fashion
Fan connectors do seem to work after a fashion
Re: Ohai!
That tranlates toPr0f wrote:You need a power supply that can provide 9v DC with at least 2A, and 12-15V AC (this voltage is rectified and regulated in the QL to provide +12V and -12V for the serial ports, video circuitry and bias for the Microdrives)
You can get away with 5V only, if you can live without serial ports, no microdrives, and RGB-TTL as video output.
Tobias
ʎɐqǝ ɯoɹɟ ǝq oʇ ƃuᴉoƃ ʇou sᴉ pɹɐoqʎǝʞ ʇxǝu ʎɯ 'ɹɐǝp ɥO
Re: Ohai!
You can't pipe 5V into the rear power connector directly - you will need to modify the 3 pin regulator socket to do that. But yes, if you remove the 5v regualtor on it's heatsink, you can apply 5 volt power there and run the QL board.tofro wrote:That tranlates toPr0f wrote:You need a power supply that can provide 9v DC with at least 2A, and 12-15V AC (this voltage is rectified and regulated in the QL to provide +12V and -12V for the serial ports, video circuitry and bias for the Microdrives)
You can get away with 5V only, if you can live without serial ports, no microdrives, and RGB-TTL as video output.
Tobias
Re: Ohai!
Might go the 5v route just to see if it powers up, keyboard works etc. Long term I'd like to have everything working just because I don't like having half working equipment.
Sounds like a minor board mod to do this though, which I wanted to avoid. If I put 9v into it in the normal fashion, will I get the 5v to where it needs to be, and avoid having to mod the board?
Sounds like a minor board mod to do this though, which I wanted to avoid. If I put 9v into it in the normal fashion, will I get the 5v to where it needs to be, and avoid having to mod the board?