Testing the rest of the board - and something exciting!
Time to give the rest of the board a good test. And try out some exciting things for the future!
We’re now live on Crowd Supply! Please head over there to register your interest.
I’m planning some updates to the existing prototype. I’m starting to think more about getting things ready for production. Which is making me think about things like EMC and EMI.
I’ll be switching over to a 4 layer board. This will give me some nice solid ground planes which will really help with the EMI.
I also need to have a look at some more filtering on the USB power side of things and add an IC to provide some in rush current limiting. According to the USB spec we’re allowed 10uF on the VBUS lines, and we’ve currently got a lot more than that if you include all the capacitors after the voltage regulator.
The video above show a bunch of testing around the battery charger and, the exciting bit, the expansion port.
This is something for the future, but it will potentially let us create an add on board that gives us HDMI output!
There’s been a lot of requests for a big screen - well this is my 27 inch monitor… and this would work equally well on a big screen TV.
However, the big focus now is on getting the current boards production ready. It looks like we will be accepted by Crowd Supply, so everything now is about getting something that can manufactured and shipped!
I hope so yes, I need to do some investigation into the certification process. But I think it's doable.
It would be really cool to understand if you've made provisions for the potential to emulate OTHER 8-bit systems with this hardware - or at least, have not designed yourself into a corner with some considerations. I for one love the idea of the ZX Spectrum 'out of the box' experience with this project - but I would, shortly after playing with it for a while, start to think about porting other emulators to it - my first would be Oricutron (for the Oric-1/Atmos machines) - so I'm trying to follow along and determine any gotchas for this .. your thoughts?