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Last Updated on: Thursday, November 30, 2017 07:43 AM

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Illuminated Banister

Problem:  Find a way to illuminate a stair banister that can be turned on and off.  The  design specified an LED light strip inside the translucent plastic railing be powered by 12vac and would draw about 25 watts.

 

Touch Activated Illuminated Handrails
Click to view Movie


NOTE : You must have Quicktime to play movie
http://www.apple.com/quicktime/download/

The above circuit is been corrected on 7/5/2012

The complete touch switch circuit is shown below.  

The remote capacitance sensor circuit is placed inside a small potting shell, which contained a three screw terminal block and a single turn variable resistor. 

The variable resistor allowed the capacitance needed to activate the switch to be set from about 10pf to 170pF.

The whole sensor assembly measured just about a half inch cube and could easily fit neatly inside the end of the hand rail. 

The two buttons were connected in parallel, so touching either button would toggle the flip/flop.

 

 

 

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eMail David A. Johnson, P.E. about this circuit


DC Magazine, 2nd Quarter 2012, Page 7:  Illuminated Bannister


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Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


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