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Forum Index : Microcontroller and PC projects : What is the minimal PicoMite HDMI setup?
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phil99 Guru  Joined: 11/02/2018 Location: AustraliaPosts: 3356 |
Another mounting option to consider is to add female headers to the top of the Pico 2 and male headers to the DVI sock. There are two other ways of doing this if you also want pins on the bottom of those pads. 1) Get Arduino style stackable header sockets with extended pins. The pins on these are longer than regular header pins so will need trimming to match the rest of the header pins. 2) Put regular header pins on both the Pico 2 and DVI sock then plug header sockets on to the sock pins. Line the header socket pins up with the top of the Pico 2 DVI pads, adjacent to the top of the pins then solder. As the socket pins won't be going through any holes this won't be all that sturdy but will be easier to remove later. |
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| mozzie Guru Joined: 15/06/2020 Location: AustraliaPosts: 423 |
G'day Tom, I wouldn't worry about the wiring too much, these are 2 of my test setups and they work perfectly at all resolutions tested   If you look back at some of the HDMI threads there are all sorts of setups and for the most part they just work surprisingly well  Regards, Lyle. |
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thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4394 |
Thanks folks, I'll stop over-thinking it  .Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| cosmic frog Guru Joined: 09/02/2012 Location: United KingdomPosts: 310 |
I managed to get HDMI out of a RP2350 Zero by extending the board. But, because the chip is on the underside of the board it tends to heat up and reset after about 10mins. You can fix this by turning the board upside down and adding a small heat sink. Notice how GP16 is taken from the onboard LED.     |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9070 |
Very neat bit of hacking! :) One of those "because it's there" things. lol Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 6048 |
@cosmic frog Are you sure it is the RP2350 overheating ? Or is it the SOT23 linear regulator for 3.3V ? Volhout PicomiteVGA PETSCII ROBOTS |
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| cosmic frog Guru Joined: 09/02/2012 Location: United KingdomPosts: 310 |
Yes, I think it was the main chip. Once I put a heatsink on the chip and turned the board over so the chip/heatsink was facing upward, I had it running ok. I think I left it on for about an hour or so. However, I never thought about the regulator. I don't think I would use this method again as it was very fiddly to wire up and took a lot of time. Dave. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9070 |
The system is fine. It's the water cooling kit that makes it a bit bulky. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 6048 |
Mick, Not sure about UK, but China (Aliexpress) is becomming uninteresting for small projects. For Netherlands they are adding tax, and an additional 3 euro per item line. So ordering 1 pico 2, 1 sd card adapter, 1 DVI breakout board, 1 CH340 UART board, 1 sound board (all items in the 1-3 euro range) adds 15 euro (5 items) and tax (21%) and (since they come from 3 different vendors) shipping for 3 shipments. I don't even include the hub board (since I cannot find it on Ali). Building my own pico computer would set met back 45-50 euro's without the hub, if I wire it on a breadboard. When I use a 2350PGA it would be 55-60 euro without the hub. Bulk orders would be much cheaper. Not fun anymore. Where is the time that you could order a pico for 4 euro, a VGA connector for 1 euro, SDcard reader board for 1 euro, PS2 connector for 1 euro per 5, and build a picomite for 10 euro. Volhout Edited 2026-08-21 05:32 by Volhout PicomiteVGA PETSCII ROBOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9070 |
I've not seen anything like that here (yet). They charge us VAT, obviously, but I've not seen any other loading. 3 euros extra per item is ridiculous. I only order items listed in Choice (£8 to get free delivery) or the buy 3 items for free delivery. I very, very rarely buy from individual sources. I'd rather pay a bit more and get the more expensive stuff from Pimoroni or somewhere like that. Sometimes I have to get, say, 5 CP2103 modules or 60 LEDs for a couple of quid but that's ok. They get used eventually. :) I usually only get the cheapest modules. The hub is on AE, or at least it was the other day when I checked. Try using "1.1" instead of "11" in the number. 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: 3866 |
I agree -- 3 euros extra per line item would be killing. Nothing like that is happening for shipments to Canada. Prices are up some--maybe 20% or more on average. Shipping is up a lot if you don't get the Choice items (3 for free shipping) or free shipping if over $10CAN (about $7.50USD). There's a lot of what I would consider time-wasting deception--item for $7, click on it and shipping is $21. (I feel it would be best for customers if all listed prices included or showed shipping.) One thing that annoys me most is that nearly 100% of advertising that Aliexpress sends is lying. $3 price (but when you look, that's for the cable, not the item pictured). Or that $7 price (but when you look, $21 shipping). Does anyone actually fall for that? The "Choice" items sometimes do represent successful advertising. I scroll through them and often buy something I hadn't been looking for. But my average order is probably under $15CAN. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 9070 |
Agreed - lots of lies using "leader" items and not mentioning inflated shipping costs. AE is a dodgy place but I find it fun. :) Tick the boxes for "Choice" and/or "Free Shipping". The Choice stuff is usually less misleading. The "Bundle for Less" area is usually odd sizes and colours or ends of lines. They don't always work out cheaper but can do if you only want three items. If you are willing to pay the minimum for a Choice order you can sometimes get item prices to work out cheaper but you may have to order other items as well. Try to avoid placing orders for anything individually on AE unless it's a single Choice item with free postage. They all work out expensive IMHO. Watch out for items shown as Local. Sometimes they can be reasonably priced and have quick delivery as they are from local warehouses. Not always though, it's worth a comparison. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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