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PhotoFlash Circuits
Photo-Flash Circuits:   # - K      L - Z

Last Updated: November 30, 2017 10:28 AM

Circuits Designed by Dave Johnson, P.E. :

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.-June, 2000

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.-January, 2002

Transmitter for Line Powered Xenon Flash - 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.-June, 2000

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.-December, 2004

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.-June, 2000 

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747


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

LED Strobe-  with high power LEDs available, their replacement for a xenon tube is viable! __ Contact P. Townshend - EduTek Ltd

LED Strobe & Contactless Tachometer-  This versatile LED Strobe & Tachometer can be used to observe and measure the RPM of rotating machinery.  It offers three different measurement methods and the readout is via a 2-line LCD module.__ SiliconChip

Led Strobe & Tacho Pt.2-  Last month, we published the circuit of our new LED Strobe & Tachometer and showed how to build the main unit and the strobe light.  This month, we describe the assembly of the optional Photo-Interrupter and IR Reflector Amplifier boards.  We also describe how the unit is used.__ SiliconChip

Led Strobe 2-  this version has been built and tested and is very simple indeed - based on alien project astable! __ Contact P. Townshend - EduTek Ltd

Light Sensor-741 Based-  The circuit as shown act as a light sensor.  Under normal conditions the resistance of the LDR is high, keeping pin 2 low.  When light falls onto the LDR the resistance drops to a couple hundred ohms and triggers pin 2 high which biases the base of Q1 via pin 6 and R4 and in turn activates the relay __ Designed by Tony van Roon  VA3AVR

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.-June, 2000

Mad idea for a blacklight strobe-  CAUTION - May be both hard on your eyes and a bit disappointing __ Designed by Don Klipstein

 
Mini Pocket Strobe-  This circuit is a mini stroboscope which you can make so small that it can fit into your pocket.  The circuit is not very powerful, but is works out of two small 1.5V batteries for an hour constantly and maximum flash rate.  The flash rate is variable from zero to about 10 Hz.  Quite nice small device to have with you in parties to gain attention __ Designed by Tomi Engdahl

Mini Strobe Light using LED-  adjustable for flash rates between40 Hz and166 Hz, based on555 Timer __ Designed by Sunamura Kazuhiro

Miniature Strobe Light-  It is a circuit for a strobe light that uses a neon glow lamp with reflector to create an effect of a strobe light. __ Electronics Projects for You

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.-January, 2002

Opto-Isolated logic level trigger for general strobe applications-  Schematic only, no circuit description. __

Photo Electric Street Light-  This is basically a Schmitt Trigger circuit which receives input from a cadmium sulfide photo cell and controls a relay that can be used to switch off and on a street lamp at dawn and dusk.  I have built the circuit with a 120 ohm/12 volt relay and monitored performance using a lamp dimmer, but did not connect the relay to an outside light.  The photo cell should be shielded from the lamp to prevent feedback and is usually mounted above the light on top of a reflector and pointed upward at the sky so the lamp light does not strike the photo cell and switch off the lamp.  The photo cell is __ Designed by Bill Bowden

Photo Flash Charger Minimizes Parts Count-  10/22/98 EDN Design Ideas: Photo-flash and strobe devices operate by discharging a high-voltage capacitor into a bulb.  Charging the capacitor from a battery or other low-voltage source requires a step-up DC/DC converter to boost the voltage, typically to 300V.  One way to generate the high voltage __ Circuit Design by Steven Chenetz, Micrel Semiconductor, San Jose, CA

Photo Meter Assesses Ambient Light-  10/15/12  EDN Design Ideas:  When most PN-junction diodes are reverse biased, they will produce a small photovoltaic output as the light level is increased.  Most PN-junction diodes can be used as photodiodes.  While not optimized for this application, they do work.  When the diode is reverse-biased, it will produce a small photovoltaic output as the light level is increased. LEDs are particularly suited for this task because their housings are transparent __ Circuit Design by Raju Baddi

Photo Timer-  Time is set by potentiometer R2 which provides a range or 1 sec.  To 100 seconds with timing capacitor C1 of 100uF.  The output at pin 3 is normally low and the relay is held off.  A momentary push on switch S1 energies the relay which is held closed for a time 1.1 X ( R1+R2) __ Designed by Ravi Sumithraarachchi

Photoflash Capacitor Charger has Fast Efficient Charging & Low-Battery Drain-  DN303 Design Notes__ Linear Technology/Analog Devices

Pocket stroboscope-  This circuit is a mini stroboscope which you can make so small that it can fit into your pocket.  The circuit is not very powerful, but is works out of two small 1.5V batteries for an hour constantly and maximum flash rate.  The flash rate is variable from zero to about 10 Hz.  Quite nice small device to have with you in parties to gain attention __ Designed by Tomi Engdahl

Repetitive trigger-  Based on the 555 timer IC, useful for strobe lights.  A bit on the 4017 counter IC for multiple flashes and sequences of flashes __ Designed by Don Klipstein

Simple Circuitry for Cellular Telephone/Camera Flash Illumination-  Linear Technology AN95 __ Designed by Jim Williams - Mar 1st, 2004

Strobe from Flash-  After using a disposable camera, you can build a strobe light (flashing light) with one simple modification. (6/02/2006) __ Designed by Jose Pino

Strobe Light-  A xenon flash tube is a triggered gas discharge device.  A voltage may be impressed across the tube and it will not conduct until the xenon gas is ionised by an external high voltage (typically 3 to 5kV).  Once triggered, the gas becomes a very low impedance, and discharges the storage capacitors in about 1ms (this varies considerably, but this figure is fine for basic calculations) __ Designed by Rod Elliott  ESP

Strobe Light-  Disco anyone? Actually, this strobe serves a much more useful purpose then making it look cool when you dance in the dark.  You can use it to view fast moving objects, look for cracks in PC boards (hold the strobe on the trace side of the board and look from the component side) , and it is a great attention getter in a store window __ Designed by Aaron Cake

Strobe Light 12 Volt Coil Powered-  This circuit will give provide a Good Strobe Effect for a variety of
Portable Uses.  Nominal current draw is "up to about" 1 amp at 12 volts.  Depending on value of capacitor on pin 2 of the 555 and the particular choke that is used.  The .01 cap on pin 2 of the 555 may be slightly changed in value to optimize the output drive to the 22 mfd capacitor. __ Designed by G.L. Chemelec

Strobex Schematic-  Schematic only for a Variable Intensity Variable Speed Stroboscope, no circuit description given. __ Designed by Samuel M. Goldwasser

Strobe Control-  Remote controller for professional lighting system stroboscope, controls the flashing speed. __ Designed by Tomi Engdahl

Strobo Disco Light using Standard Tube Lamp (TL)-  Using a standard fluorescent tube lamp ( TL) , you can make your own disco light, similar to a stroboscope light.  You can even use a half-broken lamp, which one side of the heating filaments has broken.  This circuit use only one side heating filament inside the tube.  Look at the circuit’s schematic below.__

Stroboscope-  The 220v supply is rectified and then used to charge the two 3µ* capacitors.  The 1µ capacitor also charges ( more slowly) through the 150k resistor and 1M variable resistor.  When the voltage across the 1µ capacitor is high enough to cause the diacs to conduct, the thyristor is triggered.  This produces a high voltage "pulse" at the secondary of the transformer.  This pulse causes the tube to conduct and a flash of light is produced. __ Acknowledgements The stroboscope was taken from an excellent French electronics magazine  sadly, no longer published called "Elex"

Stroboscope triggers-  This circuit typically uses a voltage around 300 volts for the main high voltage supply and needs a low voltage supply of typically 6 to 15 volts. __ Designed by Don Klipstein

Tiny Efficient High Power LED Camera Flash Solutions for Cell Phone Applications-  Design Notes 231__ Linear Technology/Analog Devices

Transmitter for Line Powered Xenon Flash-  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.-June, 2000

Trigger for Strobes-  This page contains some information on circuits which can be used for triggering stroboscopes from external circuits.  The circuit here are designed to be integrate to stroboscope circuits so that they can triggered using external trigger pulse.  The standard trigger pulse used in professional stroboscope controllers is 3-10V pulse.  If you don't already have a suitable controller, __ Designed by Tomi Engdahl

Typical Strobe Light Trigger-  555 based Timing circuit which triggers a SCR which controls the trigger transformer __ Designed by Don Klipstein

Xenon flash valve-  An experiment of the xenon flash valve. __ Designed by The Electronic Lives Manufacturing-presented Chan

Xenon Flasher-  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. __ Designed by Collin Mitchell

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.-December, 2004

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.-June, 2000

Xenon Strobe Light-  A xenon flash tube is a triggered gas discharge device.  A voltage may be impressed across the tube and it will not conduct until the xenon gas is ionised by an external high voltage (typically 3 to 5kV).  Once triggered, the gas becomes a very low impedance, and discharges the storage capacitors in about 1ms (this varies considerably, but this figure is fine for basic calculations) __ Designed by Rod Elliott  ESP

Xenon Strobe Light-  Disco anyone? Actually, this strobe serves a much more useful purpose then making it look cool when you dance in the dark.  You can use it to view fast moving objects, look for cracks in PC boards (hold the strobe on the trace side of the board and look from the component side) , and it is a great attention getter in a store window __ Designed by Aaron Cake


Photo-Flash Circuits:   # - K      L - Z


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