Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: rbowman Newsgroups: comp.os.linux.misc Subject: Re: News : ARM Trying to Buy AmperComputing Date: 24 Jan 2025 01:57:50 GMT Lines: 34 Message-ID: References: <_hycnQxlN5kAphr6nZ2dnZfqn_SdnZ2d@earthlink.com> <198f4f8c-a0d0-7caf-b67e-1f61fee9de41@example.net> <35e42921-5781-8728-236f-afad1d3b56b1@example.net> <7258fd01-44f7-850d-3f69-54b93489f64d@example.net> <_ASdnRmnz7GABhP6nZ2dnZfqn_qdnZ2d@earthlink.com> <39751a64-73b7-7c03-b140-8dd7d4b4355c@example.net> <8x2cne8LCIYpbxP6nZ2dnZfqn_GdnZ2d@earthlink.com> <5caa2a20-e6c6-720a-5e6c-54e41729d0a4@example.net> <2cf850b4-7fd8-4839-8b34-1d947c81e709@example.net> <6791595d@news.ausics.net> <7a74d4ef-ada7-66a6-8d41-ad048f426e64@example.net> <5a86ef6d-a33f-17ab-144a-9495159ca9f0@example.net> <6f7e0953-def3-9df6-80d9-732525cd3318@example.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: individual.net e2TdQ0VBqa2ra5TYC/b4bgEISEGAXGSr1ZgE7cpCRdFZCdfLJ+ Cancel-Lock: sha1:DlozdUTJIzpmoP45rJ/kPEOzKkU= sha256:ORvybE4imftY/DURR/V/wl3BLyCRUXW4kuu3Ncz6mkg= User-Agent: Pan/0.155 (Kherson; fc5a80b8) Xref: csiph.com comp.os.linux.misc:64715 On Thu, 23 Jan 2025 21:59:58 +0100, D wrote: > I've seen some tutorials utilizing the GPIO pins. I imagine that that is > where it would come in handy to avoid a birds nest of cables and crappy > soldering. I use solderless breadboards and Dupont wires when playing around. It's quick and dirty, emphasis on the dirty part. The preformed jumpers are neater but they're a bit of a PITA. I've seen videos of people pressing them in with no problems but that ain't me. I haven't done a PCB in decades and never was very good at it but that was before software to help with the routing. There's still a lot of overhead for a DIY project. https://www.instructables.com/DIY-PCB-using-Liquid-Photoresist/ That's the basic procedure I followed. For one-offs I used presensitized PCBs rather than spreading it on myself. For volume I'd make a silkscreen but then you're into a whole other art form. The artwork was tape and transfer symbols on mylar. Then you move on to etching. I used ferric chloride which is fairly nasty stuff and tends to dye everything in sight yellow. Another choice was sodium persulfate. I never used HCL and hydrogen peroxide. That seems to have its fans. Then if you finally wind up with a flawless PCB the fun begins, drilling a crap load of holes. A Dremel drill press helps. Depending on the board material, buy a lot of bits. All that makes the online services look extremely attractive.