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Forum Index : Microcontroller and PC projects : Pico Computer 3 - One board to rule them all
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 8989 |
The inner tracks are usually half the weight of the outer ones, so if you are using 1oz copper board the inner layers will be 1/2oz. I'd check your soldering *very* closely with magnification rather than blame the inner layers first. It's possible to get "whiskers" that are barely visible between close pads. 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: 11683 |
It's a two layer board - there are no inner tracks |
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Bryan1 Guru Joined: 22/02/2006 Location: AustraliaPosts: 2180 |
That next batch of boards will be here next week so I will call in and say hello to Roger and ask if he do the smd soldering for me also find out whats going on with my board. Not worth taking the risk with more boards until I can learn how to solder smd properly where watching Roger do it should give me the right idea. |
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| dddns Guru Joined: 20/09/2024 Location: GermanyPosts: 885 |
A question: I'm still looking for a permanent solution for the 3V3 power supply on my setup. I have a CH340 module with a voltage regulator, but it only supplies 250mA. Have you measured the current draw on VCC in your setup, or rather, would you say 250mA is enough (for the SD card, etc.)? I want to power the external connector separately using an AMS1117. |
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| Bryan1 Guru Joined: 22/02/2006 Location: AustraliaPosts: 2180 |
Looking at the schematic the Vin for the wifi is next to the Gnd pin so whats the bet there is a solder bridge across those pins, also on a closer look R91 and C124 got sucked up when I used my snapon solder sucker, now trying to solder those small chips back on is a challenge not for the faint hearted. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11683 |
R91 is essential. C124 probably not |
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LeoNicolas Guru Joined: 07/10/2020 Location: CanadaPosts: 609 |
Hi Peter Is it feasible to create a new graphics mode? 320 4bpp where I can use the palette to fulfill the 16 colors? This can speed up a lot the process to transfer the Another World framebuffer using the blit command. Currently I'm looping through all framebuffer memory positions, extraction each nibble, and calling pixel to set the pixel color. I'm working on another game port. This new mode will be very useful for this new one as well Edited 2026-07-31 07:56 by LeoNicolas |
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| Bryan1 Guru Joined: 22/02/2006 Location: AustraliaPosts: 2180 |
Well I texted Roger this morning and as I was leaving got a txt message saying I had a package and low and behold my second batch of boards turned up  Roger desoldered the wifi chip and soldered it back on and he had some fun fitting the resistor back on as it was bigger. Now as there were no 10K resistors Roger did have 8.8K which should be close enough. Just setup the repaired board and it booted straight into V0.12 so glad it's all fixed Also now got a second board and with both having the chips added the fun can start with Claude where I want to get the 2 of them talking to each other.regards Bryan |
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