Re: using a pi 400 to debug a pico

On Mon, 11 Mar 2024 05:38:52 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:

On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:

On Sat, 9 Mar 2024 19:51:58 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:
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On 2024-03-09, John Larkin <jl@997PotHill.com> wrote:

On Sat, 9 Mar 2024 01:26:48 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:
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Why do many of the target PCBs have four additional giant holes?

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For the retaining hooks, AKA "legs", these are optional.

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I think they are some sorts of stabilizers; must make the connections
more reliable.

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They are plastic hooks they make the connection more reliable by
maintaining it hands-free. Without them you must hold the connector
to the board fighting the spring force of the pogo-pins.
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They really blow up the board area. I like my 20-pin
ribbon connector better.

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Yes.
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I can sneak the ribbon cable out of a closed box, for temperature
testing or whatever. And bring out more signals. That pogo thing
sticks up.

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It seems unsuited for your application.

The real advantage of the pogo thing is its small cost saving, which
matters in high-volume, low margin products.

In high volume, one could both JTAG and access all the other signals
(like the ones I want) with a whole-board pogo fixture, but that has
downsides too.