I have one of these from Retro Upgrades, I never got round to using. The Wifi Arduino thing wouldn't connect and I just gave up.This site looks like it does decent upgrade kits with an addon board that makes the process a bit simpler.
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GBS-C AIO Scaler DIY Kits - Retro Upgrades
The GBS-C AIO is an addon board for the GBS Control by ramapcsx2 and others. The GBS-C AIO is by far one of the most feature packed and easy to use scalers for retro gaming and retro computing - high quality scaling has never looked so good! Features: (see full list below) Very low lag, less...www.retroupgrades.co.uk
The instructions look relatively easy with the exception of that one pin on a surface mount chip: -
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GBS-C AIO Kit Installation Guide - Retro Upgrades
We’ve recently started offering GBS-C AIO addon board kits to the store, which allow you to pick up a GBS8200/GBS8220 along with a PSU from your own region and build your own GBS-C AIO. If you’re interested in picking up a kit to build your own, click here to get one. To accommodate these kits...www.retroupgrades.co.uk
It was one of the first guides, probably the one David656 just postedYou use and particular guides @Brettster ... starting to think I'm just following in your historic footsteps at the moment 😂
The question is, what has the @Brettster not done I want to do 🤣
How so? What's the difference?use the 8220 with 2 outputs - it has much better power circuits.