Mixtel90 said  

How many do you want? Stick another Pico or two on as a remote IO device and serial connect via COM2. ;-)

I'm ordering one from whoever makes them anyway. I can't wait! I'm tired of the limitations of PicoCalc.

I have an idea....



The QWIIC connectors are optional and are powered from the Pico's supply, which also feeds the pullups. The two 4-pin I2C headers are connected to the remote device's supply. The Pico's 3V3 is fed from a diode from the remote supply so it will be powered by either the USB socket or remotely. This isn't really ideal as there will be volt drop from the external source but I didn't want to have to squeeze a mosfet in!

EDIT:
Still in design. I've just squeezed a CR1220 on board so RTCs with dead batteries can be reused. I don't like throwing them away.  :)  There's also a solder blob link to disconnect the remote 3V3 supply. That might be useful in some cases, like where the supply is from a low current source.
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Edited 2025-07-07 02:02 by Mixtel90

Just seen through a store:

https://github.com/ZitaoTech/Hackberry-Pi_Zero

Store and price   :
https://www.berrybase.de/berrybase-hackberrypi-zero-tragbares-linux-handheld-cyberdeck-mit-4-display-tastatur-trackpad

That should make the question of such a gadget superfluous
Yes, I know, it's a pi with linux, but ...

I'm looking forward to it Peter! Hopefully I can recreate it with my modest skills.
Matthias

PS Personally, I would have preferred a rectangular display in portrait orientation, but as you know, you can't have everything.