Search found 592 matches

by 1024MAK
Wed Feb 14, 2024 11:31 pm
Forum: Hardware
Topic: QL PSU Voltages
Replies: 20
Views: 684

Re: QL PSU Voltages

The off load voltages are misleading. The PSU is not regulated, so the voltages will be higher than you expect when not supplying the full rated current.

Mark
by 1024MAK
Sun Jan 14, 2024 5:16 pm
Forum: Hardware
Topic: Switching Regulator?
Replies: 35
Views: 2017

Re: Switching Regulator?

The pin details of a 7805 are well documented. See this site for example ;-)

Mark
by 1024MAK
Sun Jan 14, 2024 5:02 pm
Forum: Hardware
Topic: Switching Regulator?
Replies: 35
Views: 2017

Re: Switching Regulator?

The 'dot' indicates pin 1 which is the input (the nominal 9V from the PSU).
The middle pin (pin 2) is 0V/GND
The remaining pin (pin 3) is the +5V output.

Datasheet here ;-)

Mark
by 1024MAK
Sun Jan 14, 2024 4:55 pm
Forum: Hardware
Topic: Switching Regulator?
Replies: 35
Views: 2017

Re: Switching Regulator?

Oh, it definitely does matter which way it's connected!

Mark
by 1024MAK
Wed Dec 27, 2023 1:00 pm
Forum: Hardware
Topic: PSU for VRetro PSU?
Replies: 10
Views: 909

Re: PSU for VRetro PSU?

The maximum current rating can be higher (within reason) but not lower. If buying on a trading site, use a seller from your own country that has a good reputation or buy a known brand that has a good reputation. Stay clear of low quality imports from the far east, as often these completely ignore go...
by 1024MAK
Mon Dec 25, 2023 9:41 pm
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 638
Views: 284099

Re: Today I Received...

dilwyn wrote: Mon Dec 25, 2023 5:58 pm 3D printed Sinclair computer miniatures, including ZX80, ZX81, QL, various Spectrums, joystick and cassettes. No microdrives sadly, but my son clearly knows how much I enjoy my Sinclairs!IMG_20231225_175225205~3.jpg
Where's the LIKE button when you need it :D 8-) :ugeek: :lol:

Mark
by 1024MAK
Mon Dec 25, 2023 12:14 am
Forum: General QL Chat
Topic: Happy Christmas Everyone!
Replies: 12
Views: 2214

Re: Happy Christmas Everyone!

A very merry Christmas to all members Image 🎄 ❄️ ⛄️ 🎄

‘Tis the day to devour a pagan feast. I say to all, enjoy your day!

Mark
by 1024MAK
Tue Dec 19, 2023 6:34 pm
Forum: Software & Programming
Topic: The comp.sys.sinclair Crap Games Competition 2024
Replies: 5
Views: 828

Re: The comp.sys.sinclair Crap Games Competition 2024

Welcome to the QL universe :D

Mark
by 1024MAK
Sat Jan 01, 2022 12:48 am
Forum: General QL Chat
Topic: Happy New Year
Replies: 3
Views: 1846

Re: Happy New Year

Welcome to the year that in future will be known as two thousand and twenty two :P

Best wishes to all QL fans :D

Mark
by 1024MAK
Sat Jan 01, 2022 12:13 am
Forum: The Off-Topic Section
Topic: Happy QL Year
Replies: 16
Views: 6217

Re: Happy QL Year

Welcome to the year that in future will be known as two thousand and twenty two :P

Best wishes to all QL fans :D

Mark