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Forum Index : Microcontroller and PC projects : Homemade Pico Computer 3 clone
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
Yay! I think I've managed to modify my PC3x (well, it needed some sort of a name - it'll be PC3x WS) board for the CORE2350B. The point to point checks are OK and nothing of consequence on the DRC. Waveshare swapped some pins around on the controls side but, worse than that, they reversed even and odd numbered pins on the opposite side. It's really quite a bit off "compatible" even if it looks similar. I'll try to sort out gerbers soon. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
@lizby I've just tried uploading the board to JLCPCB and it put a "Materials charge" on for me too. I did wonder if it's because I've used smaller vias than I usually do. I can't think of anything else that's changed. The size isn't the problem, they seem to allow up to 102mm square for the cheap price. It makes quite a difference to the final price - in the wrong direction. :( Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11782 |
Mick the smallest I use are 24mil/12mil and they never get surcharged |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
I increased the via holes from 0.4mm to 0.5mm and uploaded again. It came up with a different price so I ordered the cheaper one. :) Neither of the prices in the basket was as expensive as it would have been based on the quote. Weird. These are the gerbers with the bigger holes: PC3x-2.zip Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
This is the gerber set for the Waveshare CORE2350B module on the PC3x WS. Everything else is the same as for the PGA2350B so you can use the circuit diagram and BOM (with the obvious change) for that. I've used the bigger via holes just in case it made a difference to the cost - it shouldn't have. PC3x-WS gerber.zip Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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javavi Guru Joined: 01/10/2023 Location: UkrainePosts: 595 |
Meanwhile, I attached a Wii game controller connector to my breadboard. I don't know how popular it is here, but I'm using it.  I'd also be interested in user opinions on which PС3 port pins are best for connecting two three-wire NES/SNES gamepads? |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
The NES/SNES gamepads are simple clock/data/latch signals and are completely software driven. You can use any pins except GP20/GP21 which are used for system I2C. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3871 |
I didn't change anything in the selections. 1.6mm in green is selected. FR4 is grayed out and S1000H was pre-selected. All other "Material" options are grayed out. That's probably it--I'll ask why.  PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3871 |
Chat with JLC also asked me about the hole size and then for the gerber files, which I uploaded. He then suggested I upload again. I uploaded the latest set and still got the higher base price and the $11 Material Type charge. I was just looking to see what the price would be anyway. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9081 |
Odd. TBH I'm not sure which is which in my basket as both show minimum hole size as 0.3/0.4mm when I know that for the second upload it's 0.5mm! Consequently I'm not sure which was the cheaper one, but that's what I ordered. It was the usual special offer price that I usually pay. Unfortunately SL6 has no concept of vias - they are merely PTH pads. You opt to let the solder mask cover them individually. Consequently special arrangements or settings for vias don't make sense. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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