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Re: QL Pico VGA
Posted: Mon Feb 26, 2024 12:25 pm
by Peter
Jbizzel wrote: ↑Sat Feb 24, 2024 5:06 am
I found this diagram very helpful, I think the one of the original project is not very clear and seems to show pin 4 as grounded.
It is actually a possible source of problems. It shows pin 11 not grounded, which will cause some monitors to fail.
Wiring is correct in the schematics I have published.
Re: QL Pico VGA
Posted: Mon Feb 26, 2024 6:38 pm
by Jbizzel
Thanks @peter. I'm confused pin 11 isn't rounded in the guide I followed
https://github.com/holmatic/video_if_ql_vga so I haven't grounded pin 11 either. On that link I posted is shows pin 4 as grounded, which isn't correct either. While the text description is correct. Still, this caught me out!
Where is you schematic please?
Re: QL Pico VGA
Posted: Mon Feb 26, 2024 8:12 pm
by Peter
Jbizzel wrote: ↑Mon Feb 26, 2024 6:38 pm
Where is you schematic please?
On an earlier page of this topic.
viewtopic.php?p=50584#p50584
Re: QL Pico VGA
Posted: Sat Apr 20, 2024 1:18 am
by bwinkel67
Peter wrote: ↑Tue Feb 28, 2023 7:11 pm
Finally found the time to order a nice D-Sub hood for my miniaturized version. Type Conec 16-001810E. It has an optional side cable exit, the cable relief for it should be filed off a little. With the circuit fitted, it looks like this:
qlminivga_case.jpg
And the completed QL to VGA adaptor cable:
qlminivga_complete.jpg
Had I waited for a black cable, it would be perfect.
My latest AliExpress order had room for this to bring it to free shipping (something like $1.70 for the RP2040 Zero. Can't wait to try creating this in a nice small package.
Re: QL Pico VGA
Posted: Sat Apr 20, 2024 7:18 pm
by Peter
bwinkel67 wrote: ↑Sat Apr 20, 2024 1:18 am
My latest AliExpress order had room for this to bring it to free shipping (something like $1.70 for the RP2040 Zero. Can't wait to try creating this in a nice small package.
That makes the D-Sub hood more expensive than the converter
Are you doing it without a carrier PCB?
Re: QL Pico VGA
Posted: Sat Apr 20, 2024 9:09 pm
by bwinkel67
Peter wrote: ↑Sat Apr 20, 2024 7:18 pm
That makes the D-Sub hood more expensive than the converter
Are you doing it without a carrier PCB?
That I don't know yet...It'll be a few weeks before it gets here.
Re: QL Pico VGA
Posted: Sat Apr 20, 2024 11:15 pm
by Derek_Stewart
Hi,
I have some PCBs to build, just received some RP240-Zero.
I was going to use the Conec 16-001810E, which looks really good, but in low numbers is expensive.
Maybe a 3D printed enclosure would be a possible solution.
Re: QL Pico VGA
Posted: Sun Apr 21, 2024 8:51 pm
by Peter
Derek_Stewart wrote: ↑Sat Apr 20, 2024 11:15 pm
I was going to use the Conec 16-001810E, which looks really good, but in low numbers is expensive.
Compared to previous converters, it is still very cost effective.
Re: QL Pico VGA
Posted: Sun Apr 21, 2024 11:12 pm
by Derek_Stewart
Peter wrote: ↑Sun Apr 21, 2024 8:51 pm
Derek_Stewart wrote: ↑Sat Apr 20, 2024 11:15 pm
I was going to use the Conec 16-001810E, which looks really good, but in low numbers is expensive.
Compared to previous converters, it is still very cost effective.
Hi Peter,
Yes the PicoVGA adapter is the best version, really well designed.
I have 20 PCBs, so will get them built.
At present I am under a little external pressure, which is inhibiting the starting of variour hardware projects.