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Electronics is my vocation, hobby and passion.David A. Johnson, P.E.


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Faraday Capacitance Proximity Switches

 

Faraday Capacitance Proximity Touch Switches

Faraday Capacitance Proximity Switches

  • Faraday Switches are tiny one inch cube electronic modules that operate using a capacitance change technique. 
  • Faraday Switches draw very low current and are ideal for battery powered applications.  The FS3N model has its own internal battery, which will last for about 10 years.  Model FS3X is externally powered.
  • The FS3N and FS3X models have a small total capacitance limitation and are best used for small touch surfaces.  The QTFS3X and QTFS3X-L  models can handle a higher installed capacitance and should be used for large touch surfaces, such as metal panels or metal sculptures.
  • In the FS3N and FS3X models, the capacitance change threshold is adjustable using a multi-turn pot that is an integral part of the module assembly.  A one picofarad (1pF) sensitivity is possible.
  • In the QTFS3X and QTFS3X-L models, the capacitance threshold is automatically calibrated every 30 seconds and has a fixed sensitivity of about 6pF.
  • All switch outputs are a FET transistor that has a voltage rating of 30v and is capable of switching 1 amp of current. 
  • Faraday Switches Models FS3N and FS3X contain two switch outputs: a latched output, which toggles the output on and off with each cap input activation and a momentary output, which will remain activated as long as the sensor input capacitance is higher than the level set by the module’s adjustment screw.
  • Faraday Switches Models QTFS3X and QTFS3X-L have only a momentary output.
  • The QTFS3X-L model is identical to the QTFS3X model but has an built-in LED indicator light.
  • Other custom features are possible with any of these switches.  Call for details.

Six (6) Models now available. 
Project Photos

     
Model FS3N
INTERNALLY POWERED
Model FS3X
EXTERNALLY POWERED
Model QTFS3X
EXTERNALLY POWERED
     
Model FS3N-1
INTERNALLY POWERED
Max Input Capacitance = 250pF
Model FS3X-1
EXTERNALLY POWERED
Max Input Capacitance = 250pF
Model QTFS3X-L
EXTERNALLY POWERED
with LED Indicator Light
     

Last Updated on: 15 March, 2012 05:45:10 AM


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HOME Page     Credentials      Design Expertise       Services Offered       Sample R&D       Sample Projects  
Products & Photos
    Past Client List       Dave's Family      Faraday Switches      Contact Us   
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