Re: RP2040 reset idea

On 17 Sep 2024 16:42:36 +0100 (BST), Theo
<theom+news@chiark.greenend.org.uk> wrote:

In comp.sys.raspberry-pi john larkin <JL@gct.com> wrote:

Some of my customers also want to lock a box such that it's impossible
to write to any nonvolatile memory while it's in a secure area.
 
So here's an idea: a small hole in the box allows a toothpick or a
paper clip to push a button. A short push is a regular reset. A long
push is a memory-stick mode boot. We can have a rotary switch LOCK
hole too.
 
https://www.dropbox.com/scl/fi/bbhdy053xsdzv77g0brc5/B-box_Reset_Button_3.jpg?rlkey=40ozzdvczf4z8625u8i081a9b&raw=1

>
Looks neat.  But I wonder if there's a mechanical solution.  eg give the
customer a loop to put a padlock through to lock the lid, and hide the boot
button behind, such that they can't press it without undoing the
padlock.  Could even be something simple like a Kensington lock slot where
the boot button is deeply recessed in the slot - you have to stick a
screwdriver in the slot and can't do so if there's a lock inserted.
>
Of course that might cost more than your solution, so you can probably
ignore me :)
>
Theo

It's a pretty small box.

https://www.dropbox.com/scl/fi/phhyn6p5lnwyza9of9qil/B953_Right.jpg?rlkey=xuu5qclmygkruncrat6li1u3j&dl=0

If we mount two in a 1U rack adapter, it wouldn't be practical to
remove the covers.