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Forum Index : Microcontroller and PC projects : LEO II LCD - ILI9341 experimenter's board
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I've already done one for that. Haven't I? This one? There's a version to fit the 800x400 display onto the F4 in the same thread. Edited 2023-10-18 07:04 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3802 |
Yes, and maybe a better use for the (parallel) display? John Edited 2023-10-18 07:29 by JohnS |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2135 |
3.5" ILI9488 header spacing is 92mm, PCB width 95mm, so it isn't impossible to fit but would complicate the layout and this thread is "ILI9341 experimenter's board". Provision for a diode from LCD_DO to MISO and a resistor from LCD_CS to MISO would also be needed. ILI9341 displays still function correctly, including reading back from them if these are installed. Edited 2023-10-18 07:50 by phil99 |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
I could do one for the ILI9488, I suppose. I've not got one so I'd have to work from a drawing again (if I can find one!). There seem to be a couple of variants though. Which one? We need to be specific as I've found one that is 99mm long rather than 95mm and another that seems to have pins on an Arduino pattern. TBH I'd like to do boards for displays that are current and that we know are definitely available. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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PhilP Newbie  Joined: 25/01/2017 Location: United KingdomPosts: 31 |
Mick/John - thanks for the inputs. I now have a dilemma - do I buy an F4 and associated PCB or use the kind offer of the 4.3inch board which is not perfect but saves a lot of wiring???? In a good man decision making process I think I will do both - I have wanted and excuse for trying an F4 so this may be it. Go you have the Gerbers for the 4.3inch pico board Mike? Phil |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
Not yet, but I can sort those out pretty quickly. Not perfect? What would you like? At this stage things can be changed. :) By the way, I always attempt to keep my PCBs down to 100mm x 100mm or less in order to keep the price down when ordering from JLCPCB. If you need a full backpack size for a large display then I can probably design a board to do it, but it will cost *you* a lot more to get it made. It doesn't cost *me* any extra. :) If you fancy getting a Armmite F4 I still have some of the prototype PCB kits (as shown in the above link) to fit one onto a SSD1963 reverse piggy-back style, so that you can still get to the Armmite's IO pins. Incidentally, the Armmite F4 drives its parallel displays in 16-bit mode so it's display is faster than the PicoMite, which uses 8-bit mode so that there are some pins left! Also, the pins used for the display are on a dedicated port and are not taken from the general IO pins. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| PhilP Newbie Joined: 25/01/2017 Location: United KingdomPosts: 31 |
Mick - on reflection you original design is good :) so no need to change anything. You point about the size of the PCB is well made. Yes I would like an F4 PCB kit but couldn't see it in the thread. You could PM me with more specific details. Phil |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3150 |
Click on Mick's signature text to go to his PCB files. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
The kit for the Armmite F4 is 3.80 UKP + postage. USA and Europe postage is 2.20 UKP and UK postage is 1.25 UKP. Send me a PM if interested. I've not published Gerbers for this one as my intention is to (eventually) improve on it (making it more like the Hydra 40-80). I don't know when that will be though as things are a bit awkward at present. I'll sort out the Gerbers for the PicoMite/SSD1963 today, hopefully. :) Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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vegipete Guru Joined: 29/01/2013 Location: CanadaPosts: 1109 |
Are you bold and daring? ;-) A hack I've used before to join PCBs is to put matching vias on the edges of two boards, overlap them and solder them together tight with suitable pins. If the step due to the PCB thickness is a problem, just do it twice to get back to the same level. The result can be quite rigid, especially if the joining pads are wider than a single row. I have a shear for chopping boards into pieces, so I always fill my 100x100mm boards completely with whatever might be useful. Visit Vegipete's *Mite Library for cool programs. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
There's always a way. :) You can even join them with a piece of veroboard but it's a little fragile. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2129 |
parallel tracks yet stripboard is rubbish? |
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| phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2135 |
Form wire staples to insert through both PCBs then the veroboard should fix that. Or a second piece of veroboard on the other side. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
@ Stan Ah, but these tracks are only as long as they absolutely need to be. :) @ All Happy Gerbers to you.... PicoMite-SSD1963.zip Edited 2023-10-19 07:19 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| LouisG Senior Member  Joined: 19/03/2016 Location: AustraliaPosts: 124 |
Thanks for the Gerbers, Mick. I see that the +5V connection at the display is unwired. I could add a wire link for my 7" SSD1963. Regards, Louis - |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
It's wired, isn't it? Next to SD_CS? Is yours a different version? Edited 2023-10-19 17:06 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| PhilP Newbie Joined: 25/01/2017 Location: United KingdomPosts: 31 |
Mick - thanks for Pico Gerbers. I look forward to receiving the F4 PCB Kit. Just need the garden to stop growing to get some time for all the exciting projects ahead. Phil |
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| LouisG Senior Member Joined: 19/03/2016 Location: AustraliaPosts: 124 |
Yes, you are right Mick. Display +5V pin is wired. What are the PCB dimensions? Louis - |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6798 |
It's about 65.5mm x 74mm. I wasn't too precise as the point is that it is hidden behind a 4.3" SSD1963. Obviously, if it is hidden behind one of those, then it is hidden behind the larger sizes. The fixing holes at the connector end line up with those of the 4.3" display. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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