Add Sunday, and a helper script called 'addpic.sh'

addpic.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+[ $# -ne 2 ] && {
+  echo "Usage: addpic.sh <input_filename> <gallery_filename>"
+  echo "Example: $0 ~/Pictures/Screenshot\ 2024-08-18\ at\ 23.32.55.png fusion.png"
+  exit
+}
+
+infile=$1; shift
+outfile=$(basename $1); shift
+
+
+[ -r "$infile" ] || {
+  echo "Can't read infile $infile"
+  exit
+}
+
+today=$(date +%Y-%m-%d)
+
+cmd="magick \"$infile\" -resize 400x static/img/thumbnails/$today/$outfile"
+echo "Running: $cmd"
+eval $cmd
+
+cmd="magick \"$infile\" -resize 4000000@\> static/img/fullsize/$today/$outfile"
+echo "Running: $cmd"
+eval $cmd

content/blog/wk3day7.md

@@ -1,7 +1,61 @@
 ---
-title: "Week 3, Sunday:"
+title: "Week 3, Sunday: Prototyping and 3D Printing"
 date: 2024-08-18T21:55:00+02:00
-draft: true
 ---
 
 {{< image frame="true" width="17em" float="right" src="/img/headline/noraenpure-03.png" alt="Credit: Nora en Pure, Youtube" >}}
+
+Today for most of the day I tinkered with the physical parts of my PDU project. I'm building a
+16-port sensed 19" rack mountable power distribution unit. I have these slick modbus based 16x5A
+ammeter coils which take 8-30V in and an A/B pair for RS485. I should be able to read those with the
+ethernet based ESP32 microcontroller.
+
+In the morning I took some measurements of the plastic 19" rack mountable box, which has four
+mounting pins 128mm apart, and four additional screw caps 48mm from those pins. I spent most of the
+whole afternoon prototyping a backplate with 220V C13 (aka computer) connector and a hole where the
+RJ45 ethernet connector goes. 
+
+There were two problems today, both of which took several hours:
+
+1.   Mongoose OS every now and again crashes with heap corruption and a pretty much unusable
+     coredump. I spent a long time upgrading Mongoose OS from its default ESP IDF 4.2 to a still old
+     but somewhat more modern ESP IDF 4.4. It did not help. Then I spent an even longer time reading
+     up (somewhat nerd-sniped) on the heap allocator code in Espressif's SDK. I learned a lot, but
+     did not get closer to a solution.
+1.   What I originally thought was a 145mm x 90 spacing on the ammeter, turned out to be a 146x91mm
+     (who would've thunk!), so I had to rework and re-print the ammeter brackets. But once that was
+     done, it fit snugly.
+
+I also finished the 220V wiring; in total for one PDU, that's 22 wires all cut to the correct length
+and crimped. But for eight, that would be: a lot more :) I finished just before dinner time. I had
+prepared the potatoes, baked beans and chicken croquantes, but Marina was so kind as to finish the
+cooking for me, as the green spool of PLA is a bit twisted, not unlike my humor, and I need to
+babysit this last print and every now and again untangle the spool.
+
+After dinner, I pre-baked two nice loaves for next week. I mixed 500g of _Buuremehl_ with 300ml of
+water and added yeast and salt - that's it! The dough had a first rise of 2hrs, and after dinner I
+formed the loaves, left them in the oven for 45min, and had the oven automatically turn itself on,
+bake for 40min at 160C, and presto.
+
+In the mean time, we watched a movie - Quinn chose _Requiem for a Dream_ and it's one of my all time
+favorite "Don't do drugs"-style movies. A truly stellar performance from Ellen Burstyn, and a very
+pretty Jared Leto and Jennifer Connelly. Such a sad story - highly recommended.
+
+After the movie, I went downstairs to babysit a few more 3D printer parts - every two hours turning
+on a new batch. I'm planning on making eight of these PDUs after all, so printing will take a small
+while (about 6hrs of print time per individual PDU). I had a drink of wine, and before I knew it, it
+was 02:00. I went upstairs to nosh on some _Parmigiano_ cheese, before going to bed.
+
+## Pictures of the Day
+
+{{< gallery-category >}}
+  {{< gallery-photo fn="2024-08-19/IMG_0713.JPG" caption="A mostly finished PDU - with the ESP32-ETH01 in its own little box, and brackets that will hold the ammeter." >}}
+  {{< gallery-photo fn="2024-08-19/IMG_0714.JPG" caption="One side of the box will be green, the other red. This is to signify that there are two 220V C13 inputs each with their own 8 C14 plugs on the front." >}}
+  {{< gallery-photo fn="2024-08-18/fusion.png" caption="The fusion design - top right has what I call the floorplan, with the individual screw holes and pegs of the chassis. THe other things are the parts that go within." >}}
+  {{< gallery-photo fn="2024-08-18/IMG_0710.JPG" caption="We watched Jared Leto and Jennifer Connelley in Requiem for a Dream." >}}
+  {{< gallery-photo fn="2024-08-18/IMG_0711.JPG" caption="The two loaves of bread baked themselves on a timer!" >}}
+  {{< gallery-photo fn="2024-08-18/IMG_0712.JPG" caption="Another tray of parts is freshly printed in black PLA. I will need to make eight batches of these." >}}
+{{< /gallery-category >}}
+
+{{< gallery-modal >}}
+{{< gallery-script >}}