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who can shine a light on the hoglet rgd to hdmi converter
Posted: Thu Jul 13, 2023 11:05 am
by techy
Hi forum ,
So i got only one thing clear , and that is the 2018-2020 version of the main pcb.
components and pcb ordered.
Now ,..................
What adapter board do i need for ;
zx80/81 with cap modified vid. output
spectrum with cap modified vid. output
spectrum 128 with standard vid. output
QL with standard vid. output
So at least the 3/4 level analog board iss 3
But i can not make any more of the explanation on github
can anyone help me out what else i need here ? .......please
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Thu Jul 13, 2023 2:52 pm
by Derek_Stewart
Hi,
Have aa look on the Stardot Forum, where the RGB2HDMI converter was developed, I a sure there will be more information there and maybe someone that has built the Spectrum and ZX80/81
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Sun Jul 16, 2023 2:26 am
by ql_freak
Do your really need a converter to HDMI? If it's enough to have a converter so that you can view the output of a QL, here is the thread for a cheap converter (for QL) to VGA:
https://www.theqlforum.com/viewtopic.php ... it=pi+pico
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Tue Jul 18, 2023 12:05 pm
by polka
Some time ago I posted here :
viewtopic.php?p=47660#p47660
a device to convert SCART to HDMI that I bought to display my QL on a TV that had only HDMI input. it's chinese, indeed !
Bye, POLKa
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Thu Jul 20, 2023 1:30 pm
by techy
Thanks for all info ,
right now i stop searching , as stardot nor the inventor react to my requests .
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Thu Jul 20, 2023 3:47 pm
by Derek_Stewart
polka wrote: Tue Jul 18, 2023 12:05 pm
Some time ago I posted here :
viewtopic.php?p=47660#p47660
a device to convert SCART to HDMI that I bought to display my QL on a TV that had only HDMI input. it's chinese, indeed !
Bye, POLKa
Does it display all the QL screen in monitor mode?
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Wed Jul 26, 2023 10:45 am
by Derek_Stewart
techy wrote: Thu Jul 13, 2023 11:05 am
Hi forum ,
So i got only one thing clear , and that is the 2018-2020 version of the main pcb.
components and pcb ordered.
Now ,..................
What adapter board do i need for ;
zx80/81 with cap modified vid. output
spectrum with cap modified vid. output
spectrum 128 with standard vid. output
QL with standard vid. output
So at least the 3/4 level analog board iss 3
But i can not make any more of the explanation on github
can anyone help me out what else i need here ? .......please
Try looking at this page, there is wiring suggestions for most machines:
https://github-wiki-see.page/m/IanSB/RG ... iki/Cables
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Wed Jul 26, 2023 9:05 pm
by techy
Derek thanks for all answers ,
right now i have a working pi + cpld pcb , i have info on my monitor , BUT ......
i thought i need an interface-pcb to connect my fe. ql to .
but in all text regarding this project it says that the new pcb ( i have ) allows a direct connection , but i can not find any nfo regarding that.
so a little problem there .
got the latest firmware running , but now need to verify my soldering as the firmware does not recognise the cpld
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Tue Aug 08, 2023 7:24 pm
by jobdone
Have you flashed the CPLD? if your CPLD was pre-flashed for testing purposes like some of the ones I purchased , then you may need to cut the Jumpers and use the beta (or was it alpha) version to flash with. Ideally double and triple check your soldering. In regards to what else is needed , just the cable Din Cable from the QL to the hat.
Re: who can shine a light on the hoglet rgd to hdmi converter
Posted: Wed Aug 09, 2023 12:56 pm
by techy
too small for my eyes , i can only do that iduring the weekends if my eyes had some rest ( getting older ).
the chip came from a closed reel packaging .