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Forum Index : Microcontroller and PC projects : new board from Olimex : another choice for PicoMite HDMI-USB
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| amiga Newbie  Joined: 08/05/2025 Location: BelgiumPosts: 25 |
i all folks, there is a new board for PicoMit cost +/- 25€ .. without tax and transport ! https://www.olimex.com/Products/RaspberryPi/PICO/RP2350pc/open-source-hardware  have nice day or sleepy night, @+ amiga |
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 7889 |
I've just been having a look at the circuit - probably one of their better efforts. They've used GP8 for PSRAM select but then lost two of the ADC pins by using them internally anyway. :( Do these people not realize that having the availability of 8 ADC inputs is actually a "big thing" for this sort of board? By all means bring out the battery voltage and external power detect to pins - the user can decide whether or not they need monitoring. The power supply looks like the RPi recommended switcher, I wonder if they've got it right and this thing will overclock? What's the betting that it reaches the RPi spec and not much further? 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: 496 |
Practice has proven that even homemade boards with RP2040 and RP2350 chips overclock just like the original Pico. It depends more on the specific microcontroller chip and to a greater extent on the flash memory chip, and the power supply must be OK. There are also myths about straight, identical, short tracks on the printed circuit board for HDMI! I have a homemade Murmulator board with crookedly routed HDMI tracks going sideways that works great in all PicoMiteHDMI resolutions, including high ones. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7889 |
he RP2350 is a bit of a red herring as Raspberry Pi only produce a board with the RP2350A on it, not the B version. AFAIK only Peter's design can overclock the RP2350B sufficiently for the DVI displays that the PicoMite uses, and that's only by replacing the switching supply with a linear one, Whether this Olimex board can manage it with a switching regulator is still unknown. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 1363 |
I thought I'd read that the WeAct overclocks reliably? Regardless, I'm sticking with Pete's DIL module  |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7889 |
Your first problem with that one is to find out which one you are talking about! The V1.0 and the V2.0 look the same but are different. Then there's the short one with the dual row pins down each side. Is that the Core? Very confusing. WeAct don't even mention the HSTX pins either. . Edited 2025-07-14 04:36 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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