/blog/tags/lasers/ falkp.no/blog (Lasers) Hugo -- gohugo.io en-us Fri, 23 Nov 2018 00:00:00 +0000 /blog/posts/ninjabox/ Fri, 23 Nov 2018 00:00:00 +0000 /blog/posts/ninjabox/ <h2 id="overview" > <div> <a href="#overview"> # </a> Overview </div> </h2> <p>Untrickable laser alarm, with an easy-to-knock-out fusebox.</p> <p>A tribute to (the alarms in) <a href="https://en.wikipedia.org/wiki/Mark_of_the_Ninja">Mark of the Ninja</a>.</p> <p><img src="fusebox.jpg" alt="Fusebox"></p> <h2 id="background" > <div> <a href="#background"> # </a> Background </div> </h2> <p>In the game you have to sneak into buildings with high tech alarms. Some of the laser traps can be deactivated by knocking out the fuse box with a dart.</p> <p>So I made a laser alarm with a fusebox that can be knocked out. This is mainly to keep kids occupied, and motivated to practice throwing.</p> <h2 id="features" > <div> <a href="#features"> # </a> Features </div> </h2> <ul> <li>Glowing ⚡ with simple animations and color changes (start-up, alarm, sparks)</li> <li>Laser triggered alarm, which can&rsquo;t be fooled by using a separate laser or flash light. This is done by pulsing the laser and making sure photo resistor is relatively dark when laser is off.</li> <li>Motion activated &ldquo;play dead&rdquo; (throw somehting on the fuse box, and it will black out for 10 seconds).</li> <li>Play sounds for alarm, sparks, start-up</li> </ul> <h2 id="demo" > <div> <a href="#demo"> # </a> Demo </div> </h2> <p><img src="demo.jpg" alt="Demo setup"></p> <p><a href="https://falkp.no/blog/_static/knockout.m4v">Knocking out the alarm</a> (~3MB).</p> <p><a href="https://falkp.no/blog/_static/foolalarm.m4v">Attempting to fool the alarm</a> (~2MB).</p> <p><img src="inside.jpg" alt="Inside"></p> <p>Not shown here: speaker and tiltsensor.</p> <p>See <a href="https://gitlab.com/larsfp/ninjabox">gitlab</a> for build instructions and code.</p>