From 70c9c30bbc03c7464efb1c4519e38d6112eb2f25 Mon Sep 17 00:00:00 2001 From: BlueFox Date: Wed, 9 Sep 2026 23:02:54 +0200 Subject: [PATCH] Fixed some minor semantics --- content/posts/2026/09/exposure-unit-upgrade-test/index.en.md | 4 ++-- public/en/posts/2026/09/exposure-unit-upgrade-test/index.html | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/content/posts/2026/09/exposure-unit-upgrade-test/index.en.md b/content/posts/2026/09/exposure-unit-upgrade-test/index.en.md index 829392d..c4b7373 100644 --- a/content/posts/2026/09/exposure-unit-upgrade-test/index.en.md +++ b/content/posts/2026/09/exposure-unit-upgrade-test/index.en.md @@ -27,11 +27,11 @@ The design was printed (unfortunately not mirrored ;) on two sheets of foil (usi There are some visible breaks in certain places, such as next to the label `2.0mm`. However, this is due to the printout. The same reason explains why the conductor paths merge at the thinnest point. -The circuit board was then etched in 300 g of sodium hydroxide solution (etchant: NaOH) at a ratio of 1:100. The etching time was a little over 10 minutes. +The circuit board was then etched in 300g of sodium hydroxide solution (etchant: NaOH) at a ratio of 1:100. The etching time was a little over 10 minutes. ## Conclusion So: the exposure time is 19-20 minutes, which is as expected - the time has been cut in half, from 42 minutes to a nice round 20 minutes! -In any case, for the next project (which will be the subject of an upcoming article), the imagesetter produced results with this setting that were truly satisfying—at least for me. \ No newline at end of file +In any case, for the next project (which will be the subject of an upcoming article), the exposure unit produced results with this setting that were - at least for me - truly satisfying. \ No newline at end of file diff --git a/public/en/posts/2026/09/exposure-unit-upgrade-test/index.html b/public/en/posts/2026/09/exposure-unit-upgrade-test/index.html index cf1031d..615aba0 100644 --- a/public/en/posts/2026/09/exposure-unit-upgrade-test/index.html +++ b/public/en/posts/2026/09/exposure-unit-upgrade-test/index.html @@ -1,5 +1,5 @@ Testing the Upgrade of the UV Exposure Unit :: Privacynerd's blog

Testing the Upgrade of the UV Exposure Unit

3 minutes to read (292 words)
Testing the Upgrade of the UV Exposure Unit

So, what about the exposure time? As part of a project that had been on the to-do list for quite some time and has now been tackled (see the following article), the exposure unit was put to use. However, since no exposure series had been performed with it after the upgrade to 96 LEDs (a doubling of the number), it was now time to do so.

The basis for this is a test board, which is divided into 5 sections and primarily contains conductive traces of various thicknesses.

The PCB Design

The design was printed (unfortunately not mirrored ;) on two sheets of foil (using an inkjet printer) and glued with the printed side facing the photo-coated raw PCB, after which I proceeded to expose it. First, I exposed everything for 19 minutes, and then gradually covered the respective columns with aluminum foil. The following table shows the respective exposure times:

ColumnTime [min]Condition
T019very good
T120very good
T221good
T322good
T423good

There are some visible breaks in certain places, such as next to the label 2.0mm. However, this is due to the printout. The same reason explains why the conductor paths merge at the thinnest point.

The circuit board was then etched in 300 g of sodium hydroxide solution (etchant: NaOH) at a ratio of 1:100. The etching time was a little over 10 minutes.

Conclusion#

So: the exposure time is 19-20 minutes, which is as expected - the time has been cut in half, from 42 minutes to a nice round 20 minutes!

In any case, for the next project (which will be the subject of an upcoming article), the imagesetter produced results with this setting that were truly satisfying—at least for me.