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Path: ...!news.misty.com!weretis.net!feeder6.news.weretis.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!feeder.usenetexpress.com!tr1.iad1.usenetexpress.com!69.80.99.23.MISMATCH!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Mon, 11 Mar 2024 15:04:16 +0000 From: John Larkin <jl@997PotHill.com> Newsgroups: sci.electronics.design Subject: Re: using a pi 400 to debug a pico Date: Mon, 11 Mar 2024 08:02:50 -0700 Organization: Highland Tech Reply-To: xx@yy.com Message-ID: <gj6uuidurh6qcmifj2h5q7o8plbril98dv@4ax.com> References: <d98dqit14sf7dtft162bn8h97bgns906sd@4ax.com> <slrnuqd9rc.5gm.news-1513678000@a-tuin.ms.intern> <36kdqilnf6uih8ckcj6rn6busb3sio23a0@4ax.com> <f41f7a20-9dc9-4381-a746-6b86e8094f7bn@googlegroups.com> <20rgqilmf64j0r1psk7o6u7n26t00pf59q@4ax.com> <usgdso$shha$3@gonzo.revmaps.no-ip.org> <t57pui1v79it570c5kfq33b1jb176aor8r@4ax.com> <usieku$tten$1@gonzo.revmaps.no-ip.org> <8ljpui5ips4ohhc6sv1klebar0vpc95tgn@4ax.com> <usm5dc$102tm$2@gonzo.revmaps.no-ip.org> X-Newsreader: Forte Agent 3.1/32.783 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 42 X-Trace: sv3-B4KUyo9hONckYb9vbTMOsPBaBlXE9DJxxytHtu72km67aSJTqunq/yuvmsyL2c9I5z8kviW+SVAYT23!0NfT3tnk3I03cri8Q599jSqMNTcThpLJvX3ny8GMdHHIq5tJUkOIK8AmzZN+NnwiQDo9rdCHuROm!ZhrwlA== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3182 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: >> >>>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: >>>> >>>> >>>> Why do many of the target PCBs have four additional giant holes? >>> >>>For the retaining hooks, AKA "legs", these are optional. > > >> I think they are some sorts of stabilizers; must make the connections >> more reliable. > >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. > >> They really blow up the board area. I like my 20-pin >> ribbon connector better. > >Yes. > >> 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. > >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.