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Sensors / Detectors: Capacitance Sensors   Page 1
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Sensors / Detectors -- Main Page
Last Updated on: Friday, November 20, 2015 03:33 PM

Circuits Designed by Dave Johnson, P.E. :
  • 5V CAPACITANCE TOUCH ACTIVATED MOMENTARY SWITCH
    This circuit is discussed in more detail in the section on Capacitance Proximity Switch Technology. The circuit is powered from a standard +5v supply. It has both a source and sink output that change state whenever a metal button connected to the circuit is touched. An earth ground reference is required.
  • 5-VOLT MOMENTARY OPERATION TOUCH SWITCH
    This simple circuit uses a single IC to form a nice touch switch circuit.  A single transistor forms the remote active switch sensor.  Multiple switches can be wired in parallel.  The switch circuit can be located about 500 feet from the control circuit

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

5v Capacitance Touch Activated Momentary Switch -  This circuit is discussed in more detail in the section on Capacitance Proximity Switch Technology. The circuit is powered from a standard +5v supply. It has both a source and sink output that change state whenever a metal button connected to the circuit is touched. An earth ground reference is required.... [Designed by David A. Johnson]
5-Volt Momentary Operation Touch Switch -  This simple circuit uses a single IC to form a nice touch switch circuit.  A single transistor forms the remote active switch sensor.  Multiple switches can be wired in parallel.  The switch circuit can be located about 500 feet from the control circuit.... [Designed by David A. Johnson]
AN1014: Measuring Small Changes in Capacitive Sensors -  Microchip Application Note Published 8-Dec-05  (App Note - added 2/06)
AN1016A: Detecting Small Capacitive Sensors using the MCP6291 & PIC16F690 Devices -  Microchip Application Note Published 8-Dec-05  (app note added 2/06)
AN-829: Environmental Compensation on the AD7142: The Effects of Temperature & Humidity on Capacitance Sensors -  AN-829 Analog Devices Application Notes....[App Note - ]
AN-833: Using the AD7142 & a Capacitive Sensor to Develop a Single-Push Digital Shutter Button -  AN-833 Analog Devices Application Notes  (App Note - added 2/06)
AN9 Zetex Variable Capacitance Diodes -  Zetec Semiconductors  Applications Notes An introduction to  basic ory, an explanation of  important parameters, and typical applications are described within this note. An overview is also provided for  Zetex range of variable capacitance diodes.   (App Note - added 2/06)
Build this add on Capacitance Meter -  This simple add-on capacitance meter has been specially designed to help you identify capacitors from 1p to 10u. There has always been a problem identifying capacitors, due .(schematic / circuit added 05/07)

Sensors / Detectors: Capacitance Sensors
#'s - B      C - I      J - Z


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