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Forum Index : Microcontroller and PC projects : RPi Pico Clone with SD card slot
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| Canada_Cold Newbie  Joined: 11/01/2020 Location: CanadaPosts: 37 |
Hi, I saw these on the Digikey website when I was looking for some other parts. https://www.digikey.ca/en/products/detail/groundstudio/RLJDMV-AAA/21080805 I was impressed with the look and the spects, so I ordered a couple to test with. I received the boards yesterday and booted one up with 5.08. I am very impressed with the quality of the boards. There is a boot and a Reset button, power LED, LED on GP 25, a Green LED on the battery charging circuit, a SD card adapter, USB-C connector and 8MB External QSPI FLASH memory. It also lists “Voltage regulator 2x ME6211C33U4AG-N (ADC reference and power supply)” I don’t know if anyone else has tested these. I like to idea of having a onboard SD card slot. The boards are $11.59 CAD or about $8 USD from DigiKey. https://ardushop.ro/en/home/2652-marble-pico.html Sorry, I wanted to include a picture of the board, but I couldn't find how to do that. |
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 6783 |
The Data sheet has a pic and circuit diagram. That's a creditable start! If you want to try it with VGA then you'll have to specify the VGA pins as they clash with the SD card. That's a linear regulator. Yep, the ADC REF has its own regulator. It might reduce noise a bit but it won't fix the ADC problem. 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: 3150 |
Click the tree+up_arrow icon to upload (second from the right above the edit text box). If you don't have the image as a jpg on your computer, take a screen shot, edit to clip what you want (e.g., with paint), save as jpg, and then upload. Edited 2024-05-24 20:34 by lizby PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| Canada_Cold Newbie Joined: 11/01/2020 Location: CanadaPosts: 37 |
Hi Lizby, Thanks for the help, I'll give that a try. Don |
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| Canada_Cold Newbie Joined: 11/01/2020 Location: CanadaPosts: 37 |
Hi Mick, I have not tried the ADC, but I do understand there are some issues with the ADC on the original RPi board. I think if I needed an ADC in a project, I would more likely to use an external part. Thanks, Don |
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| mclout999 Guru Joined: 05/07/2020 Location: United StatesPosts: 469 |
Clickable links. = https://www.digikey.ca/en/products/detail/groundstudio/RLJDMV-AAA/21080805 |
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