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Forum Index : Microcontroller and PC projects : Waveshare RP2350-PiZero , dvi out compatible? Picomite and MIDI commun
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 8498 |
I'm generally suspicious of *any* Pico hardware that isn't available from Raspberry Pi. Unfortunately that rules out all RP3050B options as none have been made available, only the RP3050A on the Pico 2. However, I have personal experience of: YD-RP2040 (not quite standard but with some good design decisions. Some 16MB versions don't overclock well.) RP2040-Zero (Basically a cut-down standard Pico, only lacking a RUN pin really. Good and solid performer if you don't need all the GPIO.) PGA2350B (there may be overclocking problems with early versions. Includes PSRAM.) Peter's "stretched" RP2350B module seems ideal but I've not tried it personally. One of the few designs to stick to the switching power supply and even improve on it. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| amiga Newbie  Joined: 08/05/2025 Location: BelgiumPosts: 33 |
WeAct RP2350B cost only 5.29€ (no psram) -- aliexpress olimex RP2350-PICO2-XXL cost 11,75€ ( but 21€ with transport from Tinytronics.com +- 100 km from my house) . Waveshare Core2350B Core Board( 15,29€ with extension usb/button) -- aliexpress i gonna try olimex .. @+ alfamiga |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8498 |
Interesting for Olimex. I've not investigated too deeply but the pinout to a HDMI connector is rather awkward. Half the pins are on the outer and half on the inner at the other end of the same connector. It will need some creative trace layout to get the signals roughly the same length. Personally I'd use the PGA2350B. It's not the cheapest solution and nothing else can be breadboarded either apart from Peter's module. It's pinout is reasonable though, keeping the HSTX pins together, the ADC pins together and the supply and control pins together. That helps with the track layout more than you might think at first. It's also got a linear regulator, which reduces noise on the supply rails and, to some extent, radiated noise too. Ground pins at all four corners probably help to keep a low impedance ground. It's also as minimalist as you can get, a RP2350B connected to pins and with an on-board power supply. That's all. Add everything else yourself if you want it. PSRAM is included, with CS on GP47 by default. 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: 5660 |
This has the HSX pins arranged correctly. 2350B Can be purchased with 0,2 and 8 MB PSRAM. Volhout PicomiteVGA PETSCII ROBOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8498 |
At the moment the PGA2350 is half price (£4.50) from Pimoroni. That includes 8MB PSRAM, remember. It's something of a steal at that price. It is the flawed A2 stepping though. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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