Search found 1307 matches
- Fri Feb 16, 2024 7:32 am
- Forum: General QL Chat
- Topic: My rare old QL version AH
- Replies: 22
- Views: 1181
Re: My rare old QL version AH
The battery area was under the heatsink and near the modulator - but I've never seen a board fitted with it. I did make this mod myself on and old QL, but it involves some tweaking with the reset signal during power up - if I did it again I'd use one of the power management chips that locks out the ...
- Thu Feb 15, 2024 3:22 pm
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
That should be more than enough I would have thought
- Thu Feb 15, 2024 1:58 pm
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
One thing I would say - Charlies vRetro uses some sort of stepped square wave format for the AC voltage - it works fine with the power circuity in the QL for generating +/- 12V using the small L series TO92 regulators (look like transistors), and I don't think this AC voltage is used any where else ...
- Thu Feb 15, 2024 1:54 pm
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
I know that if I have too much plugged in (curse those backplanes :-) ) the vRetro will gracefully abort trying to power the QL up. but it will happily run one expansion card in the QL no problem. I can't remember what spec my little power supply is, but I think it's 12V at 2.5A - which provides mor...
- Thu Feb 15, 2024 1:20 pm
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
What's the symptoms with the vRetro psu?
- Thu Feb 15, 2024 11:48 am
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
But the input to the 5V regulator should be about 9V DC I always thought (and have measured - when the QL is on). The regulator will work if the voltage is about 1-1.5V above the output voltage of 5V.
- Thu Feb 15, 2024 11:46 am
- Forum: Hardware
- Topic: QL PSU Voltages
- Replies: 20
- Views: 758
Re: QL PSU Voltages
Yes - if using a multimeter - put the black lead on ground - a good place that's convenient is the modulator housing, and then use the red probe to take your readings - but if the voltage you are measuring is AC - then you will need to switch the multimeter to AC range for that reading. You will get...
- Wed Feb 14, 2024 4:16 pm
- Forum: The Off-Topic Section
- Topic: Neo6502
- Replies: 6
- Views: 955
Re: Neo6502
ditto - and I like the Olimex version and the metal case you can get for it too.
- Tue Feb 13, 2024 8:39 am
- Forum: The Off-Topic Section
- Topic: Today I Received...
- Replies: 643
- Views: 292608
Re: Today I Received...
I keep seeing those advertised - I've got a couple of the lilygo boards already - and they are wonderful little things - but I am struggling to justify why I might need this one
Re: Noisy MDV
The DeOxit is an excellent contact cleaner and lubricant for contacts - but not the best choice for general lubricating. As you said Derek - a good "light oil" is what's needed, but I think 3-in-1 may be too much even. Generally lubricants intended for watches / sewing machines etc would b...