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@@ -77,7 +77,7 @@ <link>http://jaseg.de/blog/thors-hammer/</link> <pubDate>Thu, 03 May 2018 11:59:37 +0200</pubDate> <guid>http://jaseg.de/blog/thors-hammer/</guid> - <description><div class="document">


<p>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 <a class="reference external" href="https://en.wikipedia.org/wiki/PS/2_port">PS/2</a> keyboards.</p>
<figure data-pagefind-ignore>
 <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><p>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.</p></div></description> + <description><div class="document">


<p>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.</p>
</div></description> </item> <item> <title>32-Channel LED tape driver</title> |