summaryrefslogtreecommitdiff
path: root/content/posts/thors-hammer
diff options
context:
space:
mode:
authorjaseg <git@jaseg.de>2021-08-16 13:28:57 +0200
committerjaseg <git@jaseg.de>2021-08-16 13:28:57 +0200
commit63ef9727eb44275eb3ae70f24e584a37a58d415a (patch)
tree22efc0f0bfc5a20f4832c69e240223e0338da8f8 /content/posts/thors-hammer
parent403b121807ad1d238806e1c1212a6dedcadb761a (diff)
parent6c1bf0bbf6189c6927514f58271dd63831909640 (diff)
downloadblog-63ef9727eb44275eb3ae70f24e584a37a58d415a.tar.gz
blog-63ef9727eb44275eb3ae70f24e584a37a58d415a.tar.bz2
blog-63ef9727eb44275eb3ae70f24e584a37a58d415a.zip
deploy.py auto-committmp
Diffstat (limited to 'content/posts/thors-hammer')
-rw-r--r--content/posts/thors-hammer/images/thors_hammer_breadboard.jpgbin3229178 -> 0 bytes
-rw-r--r--content/posts/thors-hammer/images/thors_hammer_schematic.jpgbin1822573 -> 0 bytes
-rw-r--r--content/posts/thors-hammer/index.rst60
-rw-r--r--content/posts/thors-hammer/video/thors_hammer.mkvbin3799797 -> 0 bytes
-rw-r--r--content/posts/thors-hammer/video/thors_hammer.movbin33979697 -> 0 bytes
-rw-r--r--content/posts/thors-hammer/video/thors_hammer.webmbin4868825 -> 0 bytes
6 files changed, 0 insertions, 60 deletions
diff --git a/content/posts/thors-hammer/images/thors_hammer_breadboard.jpg b/content/posts/thors-hammer/images/thors_hammer_breadboard.jpg
deleted file mode 100644
index 4504d83..0000000
--- a/content/posts/thors-hammer/images/thors_hammer_breadboard.jpg
+++ /dev/null
Binary files differ
diff --git a/content/posts/thors-hammer/images/thors_hammer_schematic.jpg b/content/posts/thors-hammer/images/thors_hammer_schematic.jpg
deleted file mode 100644
index 3061f61..0000000
--- a/content/posts/thors-hammer/images/thors_hammer_schematic.jpg
+++ /dev/null
Binary files differ
diff --git a/content/posts/thors-hammer/index.rst b/content/posts/thors-hammer/index.rst
deleted file mode 100644
index ba851a5..0000000
--- a/content/posts/thors-hammer/index.rst
+++ /dev/null
@@ -1,60 +0,0 @@
----
-title: "Thor's Hammer"
-date: 2018-05-03T11:59:37+02:00
----
-
-In case you were having an inferiority complex because your friends' IBM Model M keyboards are so much louder than the
-shitty rubber dome freebie you got with your pc... Here's the solution: Thor's Hammer, a simple typing cadence enhancer
-for `PS/2`_ keyboards.
-
-.. raw:: html
-
- <figure>
- <video controls loop>
- <source src="video/thors_hammer.mov" type="video/h264">
- <source src="video/thors_hammer.webm" type="video/webm">
- Your browser does not support the HTML5 video tag.
- </video>
- <figcaption>A demonstration of the completed project.
-
- <a href="video/thors_hammer.mov">h264 download</a> /
- <a href="video/thors_hammer.webm">webm download</a>
- </figcaption>
- </figure>
-
-The connects to the keyboard's PS/2 clock line and briefly actuates a large solenoid on each key press. An interesting
-fact about PS/2 is that the clock line is only active as long as either the host computer or the input device actually
-want to send data. In case of a keyboard that's the case when a key is pressed or when the host changes the keyboard's
-LED state, otherwise the clock line is silent. We ignore the LED activity for now as it's generally coupled to key
-presses. By just triggering an NE555 configured as astable flipflop we can stretch each train of clock pulses to a
-pulse a few tens of milliseconds long that is enough to actuate the solenoid.
-
-.. raw:: html
-
- <figure>
- <img src="images/thors_hammer_schematic.jpg" alt="The schematic of the PS2 driver">
- <figcaption>The schematic of the driver stretching the PS/2 clock pulses to drive the solenoid.</figcaption>
- </figure>
-
-
-Since PS/2 sends each key press and key release separately this circuit will pulse twice per keystroke. It would be
-possible to ignore one of them but I figure the added noise just adds to the experience.
-
-Built on a breadboard, the circuit looks like this.
-
-.. raw:: html
-
- <figure>
- <img src="images/thors_hammer_breadboard.jpg" alt="The circuit built on a breadboard">
- <figcaption>The completed circuit built up on a breadboard and attached to a keyboard.</figcaption>
- </figure>
-
-
-Since my solenoid did not have a tensioning spring I used a rubber band and some vinyl tape to make an adjustable
-tensioner. The small orange USB hub serves as an end-stop because I had nothing else of the right shape. The sound and
-resonance of the thing can be adjusted to taste by moving the end stop, adjusting the tensioning rubber and tuning the
-excitation duration using the potentiometer. My particular solenoid was a bit slow so I added some pieces of circuit
-board as shims between the plunger and the case to limit the plunger's travel inside the solenoid core.
-
-.. _`PS/2`: https://en.wikipedia.org/wiki/PS/2_port
-
diff --git a/content/posts/thors-hammer/video/thors_hammer.mkv b/content/posts/thors-hammer/video/thors_hammer.mkv
deleted file mode 100644
index c9581e9..0000000
--- a/content/posts/thors-hammer/video/thors_hammer.mkv
+++ /dev/null
Binary files differ
diff --git a/content/posts/thors-hammer/video/thors_hammer.mov b/content/posts/thors-hammer/video/thors_hammer.mov
deleted file mode 100644
index fff65a8..0000000
--- a/content/posts/thors-hammer/video/thors_hammer.mov
+++ /dev/null
Binary files differ
diff --git a/content/posts/thors-hammer/video/thors_hammer.webm b/content/posts/thors-hammer/video/thors_hammer.webm
deleted file mode 100644
index 2bcf1ca..0000000
--- a/content/posts/thors-hammer/video/thors_hammer.webm
+++ /dev/null
Binary files differ