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

Circuits designed by David Johnson, P.E.
Last Updated on: Monday, July 11, 2016 01:59 PM

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Xenon Lamp Circuits

1.5V Touch Activated Switch  -  A single 1.5v silver oxide button cell powers this complete touch activated switch circuit for 5 years.  It features both a normally open and a normally closed set of solid-state switch thermals.  It also has an adjustable sensitivity, which can be set for a touch capacitance change as small as 1 picofarad. . . . [Circuit by David A. Johnson P.E.,  01/18/02]

 

9v Powered Xenon Photoflash Controller  -  This 9v battery powered circuit is designed for remote control flash needs. A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged. A neon lamp is included to indicate when the system is ready to flash . . . [Circuit by David Johnson P.E.,  06/03/00]


 12v Touch Switch Exciter Circuit  -  This circuit is designed to generate a 20KHz pseudo sine wave signal that can power about 50 remote touch activated switch circuits.  It can support a cable length of about 2500 feet.  A typical remote switch circuit is also shown as well as a receiver circuit for those switches. . . . [Circuit by David Johnson P.E.,  02/10/02]

 Capacitance Touch Switch  -  A single 1.5v silver oxide button cell powers this complete touch activated switch circuit for 5 years.  It features both a normally open and a normally closed set of solid state switch thermals.  It also has an adjustable sensitivity, which can be set . . . [Hobby Circuit designed by David Johnson P.E.,  01/18/02]


Controller for a 9v Powered Xenon Photoflash  -  This 9v battery powered circuit is designed for remote control flash needs. A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged. A neon lamp is included to indicate when the system is ready to flash . . . [Hobby Circuit designed by David Johnson P.E.,  06/03/00]

 

Detect Short Xenon Lamp Flashes  -  This circuit uses a small 2.5mm square photo diode in conjunction with a 100mH coil to detect the short light flashes from a xenon lamp.  The coil makes the circuit immune to normal room lights.  Its 10mv sensitivity can detect light flashes from a range of over 100 feet. . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/15/02]

 

Detects Xenon Lamp Flash  -  This circuit has a very low standby current requirement yet has very high sensitivity toward the light flashes from a xenon lamp.  When connected to a flip/flop it can serve as an on on/off Controller . . . [Hobby Circuit designed by David A. Johnson P.E.,  12/18/04]


Flash Detector for Xenon Lamp  -  This circuit uses a small 2.5mm square photo diode in conjunction with a 100mH coil to detect the short light flashes from a xenon lamp.  The coil makes the circuit immune to normal room lights.  Its 10mv sensitivity can detect light flashes from a range . . . [Circuit by David Johnson P.E.,  02/15/02]


Line Powered Xenon Flash Transmitter  -  This line powered xenon flash circuit drives a small camera type flash tube.  It has an optical isolator to allow the flash to be safely triggered from some remote device.  A flash rate of 2Hz is possible with the circuit . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/09/00]


Line-Powered Xenon Flash Transmitter  -  This line powered xenon flash circuit drives a small camera type flash tube.  It has an optical isolator to allow the flash to be safely triggered from some remote device.  A flash rate of 2Hz is possible with the circuit . . . [Circuit by Dave Johnson P.E.,  06/03/00]

 

Momentary Touch Activated Switch  -  A single 1.5v silver oxide button cell powers this complete touch activated switch circuit for 5 years.  It features both a normally open and a normally closed set of solid-state switch thermals.  It also has an adjustable sensitivity, which can be set for a touch capacitance change as small as 1 picofarad. . . . [Hobby Circuit designed by Dave Johnson P.E.,  01/18/02]

 

 Touch Activated Switch  -  This circuit provides about one watt of non-isolated DC power for an automotive type 12v LED array lamp in addition to a standard incandescent table lamp. . . . [Circuit by David A. Johnson P.E.,  01/18/02]

 

Xenon Flash Transmitter  -  This line powered xenon flash circuit drives a small camera type flash tube.  It has an optical isolator to allow the flash to be safely triggered from some remote device.  A flash rate of 2Hz is possible with the circuit . . . [Hobby Circuit designed by David Johnson P.E.,  06/09/00]


Xenon Lamp Flash Detector  -  This circuit uses a small 2.5mm square photo diode in conjunction with a 100mH coil to detect the short light flashes from a xenon lamp.  The coil makes the circuit immune to normal room lights.  Its 10mv sensitivity can detect light flashes from a range . . . [Circuit by David A. Johnson P.E.,  02/15/02]


Xenon Lamp Flash Detector Amplifier  -  This circuit has a very low standby current requirement yet has very high sensitivity toward the light flashes from a xenon lamp.  When connected to a flip/flop it can serve as an on on/off Controller . . . [Circuit by Dave Johnson P.E.,  12/14/04]


Xenon Photoflash Controller  -  This 9v battery powered circuit is designed for remote control flash needs. A charge control circuit turns off the high voltage generator when the photoflash capacitor is fully charged. A neon lamp is included to indicate when the system is ready to flash . . . [Circuit by David A. Johnson P.E.,  06/03/00]
 

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


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