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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. ….(designed by David A. Johnson) |
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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.
….(designed by David A. Johnson) |
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15 Volt Strobe Circuit - this circuit uses12V DC instead od mains AC. This is very
good idea if you don't want to mess with direct mains voltage connected circuit or you
want to run Strobe from batteries. (added 4/02) |
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3 Xenon flashing circuits found in flash for disposable cameras - You are going to
like this project. It costs less than $3.00, contains six BUILDING BLOCKS, re-cycles a
disposable flash camera and you are going to learn a lot about electronics.
Everyone has seen a disposable flash camera….(electronic schematic / circuit added
05/07) |
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3v Capacitance Proximity Switch - This circuit was designed to provide a touch
activated switch function without an external power supply. It draws so little
power that a single 3v battery will operate the circuit for many years. It is
discussed in more detail in the section on Capacitance Proximity Switch Technology.
….(designed by David A. Johnson) |
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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) |
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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) |
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741 Based Light Sensor - CdS photocell used for light/dark controlled relay (Tony
van Roon's electronic design added 5/02) |
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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. ….(designed by David A.
Johnson) |
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Adjustable Strobe Light - This Adjustable Strobe Light is the bigger brother of
the plain old strobe light. This one uses a much more powerful "horse shoe" Xenon tube
which produces more light. You can also control the flash rate up to about 20Hz. Do
not look directly at the flash tube when this thing is on!…. (electronic Circuit /
Schematic added 10/04) |
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Air Transparency Monitor, Xenon Flash Transmitter - This is the matching
transmitter for the above receiver. The transmitter launches powerful 1000-watt light
pulses that last about 20 microseconds. ….(designed by David A. Johnson) |
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AN 30 LX1995 LED Driver: Camera Flash Application - Application Note Microsemi
1313 (added 05/06/07) |
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Beat Tracking Strobe - project description using AT90S8515 microcontroller and
some electronics (added 5/03 |
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Easy Xenon DC-to-DC Converters! - (design circuit added 8/02) |
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Emergency Strobe Flasher Generates 250V - 08/05/99 EDN-Design Ideas:.....(design
idea added 8/05) Figure 1 shows a complete circuit for an emergency lamp that operates
from a 12V automotive battery. The xenon flash tube requires a 250V-dc anode voltage
and a 4-kV trigger pulse. To generate the 250V dc, IC1, a switching regulator
controller, and T1, a standard Versa-PAC transformer, operate in the.... |
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Flash Slave Trigger (Aaron Cake) - Flash slaves are used when you need to
supplement1-flash unit with1-or several more. This slave trigger simply triggers those
other units. It does this by "seeing" the first flash (using a phototransistor) and
triggering the other flashes a few microseconds later. The sensitivity of the circuit
is adjustable to compensate for ambient light or dimmer than usual master flashes.
(added 5/02) |
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Hacking the Kodak Max Single Flash Camera into a Self Repeating Strobe - this
approach is recommended mainly for homebrewing a strobe that is powered by a single1.5
volt battery. If you can use a higher supply voltage, there are better ways to do
this. (added 4/02) |
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High Power Touch Switch Exciter Circuit - If you have hundreds of touch switches
that need an excitation signal, then this circuit is what you need. Its 20KHz
20v peak to peak output signal can supply up to 3 watts of touch switch excitation
power. ….(designed by David A. Johnson) |
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Light Sensor-741 Based - CdS photocell used for light/dark controlled relay (Tony
van Roon's electronic design added 5/02) |
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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. ….(designed by David A. Johnson) |
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Luxeon for Camera Phone Flash PDA & DSC Applications - This reference design
outlines the key considerations in the construction of a solid state, high performance
flash solution utilizing Luxeon LED technology. This design integrates Lumileds’ high
power Luxeon Emitters product with a cost effective lens solution to provide the
necessary light output....(added 3/05) |
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LX1995 LED Driver: Camera Flash Application AN-30 - Application Note 30 from
Microsem (app note added 6/06) |
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Mini Pocket Strobe Circuit - works from two1.5-Volt AA batteries, based on
modified camera flash unit (added 6/03) |
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Mini Strobe Light using LED - adjustable for flash rates between40 Hz and166 Hz,
based on555 Timer (added 6/03) |
