![](\"https:\/\/nuxx.net\/blog\/wp-content\/uploads\/2026\/06\/rs232_el_24v_pcb_firstdraft.png\")
<\/a><\/center><\/p>\nRemember those RS232 to Eaton Leonard<\/a> adapters I made a few months back? Well, there’s a need for me to develop a version which can run from 24VDC, so I did. The switching power supply mentioned a few days back<\/a> is used in this (you can see its footprint there on the left), with the rest being the same as the other board.<\/p>\n I had to remove the reverse voltage protection (it just won’t really work with the high potential input voltage this needs), I’m using a resistor network instead of discreet resistors to make assembly easier, selected different LEDs (ones that use slightly higher current to go with the 120R network), and laid out the whole board again.<\/p>\n That picture up above is missing the documentation and logo layers, just to obfuscate things a bit. I may also tweak a little bit of the design, but I think I’m happy with it. It’s now 3″ x 3″ instead of the original 3″ x 2″, but that extra three square inches is needed for the power supply. Yes, there’s a bit of blank space still, but I don’t think it’s enough to make shrinking the board worthwhile. The cost difference between the previous PCBs and these is pretty much nonexistant, if I’m remembering the quote right.<\/p>\n I think I’m going to keep compacting the board. Hmm…<\/p>\n UPDATE:<\/strong> I just shaved a square inch off the board by bringing the top in 1\/4″. LEDs were compacted a bit, logo made smaller, L2 moved, and more.<\/p>\n","protected":false},"excerpt":{"rendered":" Remember those RS232 to Eaton Leonard adapters I made a few months back? Well, there’s a need for me to develop a version which can run from 24VDC, so I did. The switching power supply mentioned a few days back is used in this (you can see its footprint there on the left), with the\u2026<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,11,34],"tags":[],"class_list":["post-9068","post","type-post","status-publish","format-standard","hentry","category-electronics","category-making-things","category-moved-from-livejournal"],"_links":{"self":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/9068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/comments?post=9068"}],"version-history":[{"count":3,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/9068\/revisions"}],"predecessor-version":[{"id":12561,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/9068\/revisions\/12561"}],"wp:attachment":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/media?parent=9068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/categories?post=9068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/tags?post=9068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![RS232 to Eaton Leonard<\/a> adapters I made a few months back? Well, there’s a need for me to develop a version which can run from 24VDC, so I did. The](\"https:\/\/nuxx.net\/blog\/wp-content\/uploads\/2026\/06\/IMG_8566-scaled.jpg\"){kind=link}