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Forum Index : Microcontroller and PC projects : Pico Computer 3 - One board to rule them all
| Author | Message | ||||
| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 11465 |
Here is an update to the HDMIUSB board SCH_Schematic1_2026-06-13.pdf    This is configured using OPTION RESET PICO COMPUTER 3 with the 6.03.00 firmware (RC18 onwards. This configuration applies to every RP2350 build. In the case of VGA builds you can use a little PCB adapter to connect to the I/O port.  In the case of the WEB and bluetooth builds it uses the official Raspberry Pi RM2 (RMC20452T) wireless module which effectively makes the board a super RP2350B Pico2-W I've been using a first prototype to test the new HDMIWEB build and all looks good. Note that I've simplified the DVDD supply by using a fixed 1.3V regulator which works perfectly up-to 396MHz and the board now includes a 4 Pin JST-SH Cable (Qwiic, STEMMA QT, Qw/ST) connector to allow modules to be chained off it if required. I've also replaced the p-channel mosfet which switched the USB host 5V rails with a proper higher power but current limiting switch. As before the board provides I2S audio has a DS3231 RTC and all the usual goodies. I'm waiting on a second prototype that has a trivial pin usage change and assuming all good will then release the gerbers. Cost for a board fully populated other then the RM2 module (JLC/LCSC don't yet stock it, but they did do the PCB layout for me) is about USD45 each in 5-off quantity Edited 2026-06-13 21:40 by matherp |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3778 |
With PSRam. Super indeed. How solderable is the Wifi module? Any suggestion from JLC that they will stock it? If any in Canada want some, I would be interested in placing an order and selling 3. Or buying 2 from someone who places an order. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS |
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| grumpyoldgeek Regular Member  Joined: 30/07/2018 Location: United StatesPosts: 53 |
Beautiful. I want two of them. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11465 |
The RM2 is solderable by hand. The pads extend a bit beyond the outline of the device and it has solder pad cutouts like the Pico. However, the easy way is a bit of solder paste and a heatgun - all done in 10 seconds |
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