Browsing All posts tagged under »Electronics«

Hardware: Building a light bridge

December 10, 2011

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[First draft, updated] Basis A light bridge in its simplest form is a light source and a light receptor. When the light source can no longer be “seen” by the receptor, the bridge is “broken”. Light bridges are most common in shops where, when you enter, some kind of “ding dong” chime is activated. What […]