Comments on: Simple Electric Eye Rings Fire Bell, Open Garage Door http://blog.modernmechanix.com/2006/11/09/simple-electric-eye-rings-fire-bell-open-garage-door/ Yesterday's tomorrow, today. Sun, 22 Nov 2009 11:04:18 -0800 http://wordpress.org/?v=2.8.4 hourly 1 By: MAKE: Blog http://blog.modernmechanix.com/2006/11/09/simple-electric-eye-rings-fire-bell-open-garage-door/comment-page-1/#comment-18760 MAKE: Blog Thu, 09 Nov 2006 19:39:23 +0000 http://blog.modernmechanix.com/2006/11/09/simple-electric-eye-rings-fire-bell-open-garage-door/#comment-18760 <strong>Electric eye rings fire bell - Opens garage door...</strong> Simple garage door project from "How To Build It" 1932 - "ANYONE interested in experimental electricity can gain a great deal of knowledge and pleasure from the construction of this light-sensitive selenium cell, and have also a handy electric...... Electric eye rings fire bell – Opens garage door…

Simple garage door project from “How To Build It” 1932 – “ANYONE interested in experimental electricity can gain a great deal of knowledge and pleasure from the construction of this light-sensitive selenium cell, and have also a handy electric……

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