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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.org.uk/users/penguin42/statuses/113464758659011138">penguin42 (penguin42@mastodon.org.uk)'s status on Tuesday, 12-Nov-2024 00:06:18 JST</a><a href="https://mastodon.org.uk/@penguin42" title="penguin42@mastodon.org.uk"><img src="https://gnusocial.jp/avatar/29506-48-20230415175230.webp" width="48" height="48" alt="penguin42" style="position: absolute; left: 0; top: 0;">penguin42</a></section><article><p>A while ago, I think it was <a href="https://studio8502.ca/@mos_8502">@mos_8502</a> that mentioned diode matrixes as old ROMs, I think with a picture of an old computer board.<br>The thing with Diode matrixes is you could make them yourself - here's one my dad made probably in the late 70's, holding morse code for his callsign and common phrases (probably a CQ etc) - I've not decoded it yet.</p><p><a href="https://mastodon.org.uk/tags/retrocomputing" rel="tag">#retrocomputing</a> <a href="https://mastodon.org.uk/tags/hamradio" rel="tag">#hamradio</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3979757#notice-7775304">In conversation</a><time datetime="2024-11-12T00:06:18+09:00" title="Tuesday, 12-Nov-2024 00:06:18 JST">about 6 months ago</time> <span>from <span><a href="https://mastodon.org.uk/@penguin42/113464758659011138" rel="external" title="Sent from mastodon.org.uk via ActivityPub">mastodon.org.uk</a></span></span><a href="https://mastodon.org.uk/@penguin42/113464758659011138">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/3463161">An electronic prototyping board with strips  onto which are soldered a collection of diodes (and spaces) stood up to thick wires going across the top; a set of rainbow ribbon cable connects onwards.  It's very home made.</a></label><br><a href="https://cdn.mastodon.org.uk/media_attachments/files/113/464/745/618/718/263/original/1527fdcf98aa6020.jpeg" rel="external">https://cdn.mastodon.org.uk/media_attachments/files/113/464/745/618/718/263/original/1527fdcf98aa6020.jpeg</a></li></ol></footer></blockquote>

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penguin42 (penguin42@mastodon.org.uk)'s status on Tuesday, 12-Nov-2024 00:06:18 JST penguin42
A while ago, I think it was @mos_8502 that mentioned diode matrixes as old ROMs, I think with a picture of an old computer board.
The thing with Diode matrixes is you could make them yourself - here's one my dad made probably in the late 70's, holding morse code for his callsign and common phrases (probably a CQ etc) - I've not decoded it yet.
#retrocomputing #hamradio
In conversationabout 6 months ago from mastodon.org.ukpermalink
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1. An electronic prototyping board with strips onto which are soldered a collection of diodes (and spaces) stood up to thick wires going across the top; a set of rainbow ribbon cable connects onwards. It's very home made.
  https://cdn.mastodon.org.uk/media_attachments/files/113/464/745/618/718/263/original/1527fdcf98aa6020.jpeg

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