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Light Flasher Circuits
Light Flashers:  #'s - B        C - K        LO        P - S         T - Z

 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :

Ten-LED Sequential Flasher using Low Powr - A while back I posted a flasher circuit which flashed 10 LEDs sequentially.  That circuit was powered by four AA alkaline cells.  The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell. . . Circuit by David A. Johnson P.E.-April, 2011

Three Volt Universal LED Flasher - The circuit below will flash any LED color with fixed current pulses powered by a 3v battery.  It uses a charge pump approach, which routes a constant current pulse through the LED, regardless of the LED voltage requirement.  Using this approach, white and . . . Hobby Circuit designed by David Johnson P.E.-June, 2008

Three-Volt Low Battery Voltage Flasher - Many battery powered devices use two AA alkaline cells.  Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating.  The hobby circuit below can be connected to a 3v battery, to give you some . . . Hobby Circuit designed by David Johnson P.E.-January, 1998

Three-Volt Powered Super Bright LED Flasher - I have posted several kinds of LED flashers over the years.   This is yet one more flasher, designed to flash any high power LED of any color.  It hits the LED with a 25ms 250ma pulse once every 2 seconds.   This works out to an average current about 3ma.  It . . . Hobby Circuit designed by David Johnson P.E.-April, 2009

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.-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

TV_Fake_Camera_Flasher -  After having my doorbell rung several times in the middle of the night by some kids, I decided to install some fake TV cameras around the outside of my house.  I was not satisfied with the LED lights on the cameras.  The heavy current drain of the original circuit meant I would have to replace the battery every few months.  So, I removed the original LED driver and added my own simple flashing circuit.   . . . Hobby Circuit by David Johnson P.E.-August, 2017


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

Tail/Brake Light Signal Cluster -  Designed at the request of several correspondents, the circuit is the merger of two existing designs already available on this site, namely: LED driven tail/brake Light Cluster and Brake Light Signal Module. __ Contact: Flavio Dellepiane, fladello @ tin.it

Ten-Channel LED Sequencer -  The 4017 is a CMOS decade counter with 10 decoded outputs.  Inputs include a clock    (pin 14) , a reset    (pin 15) , and a clock inhibit    (pin 13)  __ Designed by Bill Bowden

Ten-Channel Light Controller -  A 10 channel light controller using PWM/ up to 1a per channel at 12v __ Contact: P. Townshend EduTek Ltd

Ten-LED Chaser -  I don't know why, but people like blinking lights.  You see LED chasers everywhere, in TV shows    (Knight Rider) , movies, and store windows.  This schematic is my version of a simple 10 LED chaser.  There is no 555 timer used because __ Designed by Aaron Cake

Ten-LED Sequencer -  Schematic only, text in Finnish

Ten-LED Sequential Flasher using Low Powr -  A while back I posted a flasher circuit which flashed 10 LEDs sequentially.  That circuit was powered by four AA alkaline cells.  The circuit below operates much the same way but has been modified to run from a single 3v CR2032 lithium coin cell. . . Circuit by David A. Johnson P.E.-April, 2011

The LED Flasher -  This is a very simple project using a printed circuit board and 8 components.  It will flash an ordinary 3mm or 5mm  (1/8" or 1/4") LED at a rate of about one flash per second.   __ Designed by Collin Mitchell

The LED Flashing Sweetheart Kit -  When was the last time you gave a gift you made yourself? Elementary school? Get off the consumerist fast track and quit copping out with inferior gifts like candy and flowers.  The LED Flashing Sweetheart Kit contains a circuit board, 28 LEDs

Third Brake Light -  This circuit is NOT a pulser or flasher! What's so special about this circuit? Well, the first third-brake light I installed I had to pull a wire from the Third Brake Light all the way underneath the carpet to the brake-pedal-switch and I thought it would be easier to pluck the signal of both brakelights via the trunk.  Bench-test your circuit first and apply power to the circuit,  __ Designed by Tonny Von Roon

Third Brake Light Pulser -  Several years ago these flashers were introduced in the automotive industry as part of the third brake light and contained strobe lights    (and strobing continuously for the duration of pressing the break pedal) but got abandoned almost immediately sometime later because of the 'strobe' effect it has on some people.  This circuit has become obsolet since much better circuits are available these days without the 'lag' in between brakes caused by R4 and C3.  One of the circuits is listed below __ Designed by Tony van Roon  VA3AVR

Three Channel Color Organ for a Car -  An Active Filter Design.   __ Designed by G.L. Chemelec

Three Channel Color Organ for a Car -  An Active Filter Design.   __ Designed by G.L. Chemelec

Three Volt Universal LED Flasher -  The circuit below will flash any LED color with fixed current pulses powered by a 3v battery.  It uses a charge pump approach, which routes a constant current pulse through the LED, regardless of the LED voltage requirement.  Using this approach, white and . . . Hobby Circuit designed by David Johnson P.E.-June, 2008

Three-Volt Low Battery Voltage Flasher -  Many battery powered devices use two AA alkaline cells.  Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating.  The hobby circuit below can be connected to a 3v battery, to give you some . . . Hobby Circuit designed by David Johnson P.E.-January, 1998

Three-Volt Powered Super Bright LED Flasher I have posted several kinds of LED flashers over the years.   This is yet one more flasher, designed to flash any high power LED of any color.  It hits the LED with a 25ms 250ma pulse once every 2 seconds.   This works out to an average current about 3ma.  It . . . Hobby Circuit designed by David Johnson P.E.-April, 2009

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

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.-January, 2002

Traffic Light -  A two-way traffic light using a CMOS 4017 and 555.  To be used as toy only __ Designed by Jose Pino

Traffic Light -  This project operates red, amber and green LEDs in the correct sequence for a single UK traffic light.  The time taken for the complete red, red & amber, green, amber sequence can be varied from about 7s to about 2˝ minutes.  A 4017 counter is used to produce the traffic light sequence and this project could be adapted __ Designed by John Hewes

Traffic Light 2 -  A two-way traffic light using a CMOS 4017 and 555.  To be used as toy only __ Designed by Jose Pino

Traffic Light Controller -  Controls on3 LED traffic light sequence __ Designed by rstevew@armory.com

Transistor Flasher  -  The basic two-transistor flasher shown below has found its way into dozens of applications due to its simplicity and versatility.  Applications have included such diverse circuits as a micropower low battery indicator, a lightning detector, .   __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Transistor LED Flasher -  A simple LED flasher that uses only two transistors, one capacitor and one resistor.  This basic oscillator can have other simple applications.   __ Designed by Jose Pino

Transistor LED flasher -  This circuit has a lot going for it.  For one thing, it only consists of two transistors, two capacitors and four resistors.  That also means it consumes very little power.  You can control the flash rate by changing the size of the 100k resistors    (100k makes for a pretty slow rate) .  You can also control the duty cycle by using resistors of different values on the two sides __ Designed by Colin Pringle

Transistor Organ -  This simple circuit can provide hours of enjoyment as you learn tunes, play duets or just make some really weird sounds by pushing all the buttons at once.  You have probably seen this circuit before, it is fairly common.  I have seen it in several __ Designed by Aaron Cake

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

Tricolor LEDs Create a Flashing Array -  24-Jun-10 EDN-Design Ideas You can build a matrix of RGB (red/green/blue) LEDs using a simple and inexpensive circuit comprising the control logic and driver circuit in Figure 1 and some LEDs (Figure 2) .  The center RGB LED is the first to come on, after which each sequential LED in the 8×8-LED matrix follows.  This process gives the appearance that the display is alive and moving outward.  This sequence repeats, producing a rainbow effect of colors __ Circuit Design by Jeff Tregre, www/BuildingUltimateModels/com, Dallas, TX

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 strboscope 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

Triple Stroboscope -  This circuit enables observation of movement between other stroboscopes.  Generation of rectangular signal is based on NE555.  This circuit requires a low power supply that is made from a simple transformer TR1, traditional rectifier bridge and zener diode.  NE555 works in multivibrator mode generating astable pulses of 2Hz to 20Hz.  The frequency is adjusted by potentiometer P1.  The control potentiometer P1 can be placed as far as 30 meters away, for suspension of stroboscope’s work from far away. __ Contact: IQ Technologies

Turn-signal System for Motorcycles -  This circuit is based on the CMOS IC from Motorola, the MC14049UB Hex Inverting Buffer.  Of course, the regular CD4049 can be used and is pin-for-pin compatible.  The 4049 is a 16-pin chip.  Maximum DC supply voltage should not exceed 18V.  The above diagram can replace your existing mechanical clicker.  The prototype worked excellently!__ Tony van Roon  VA3AVR

Twinkle Twinkle X’mas Star -  Christmas just would not be Christmas if you do not put a flashing star on your Christmas tree.  Here is the circuit of such a flashing star.Fig.1 shows the circuit...__ Electronics Projects for You

Two Transistor Flasher -  The basic two-transistor flasher shown below has found its way into dozens of applications due to its simplicity and versatility.  Applications have included such diverse circuits as a micropower low battery indicator, a lightning detector, a off-line.   __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Two Transistor LED Flasher -  This circuit will flash a bright red LED as an attention getting device or fake care alarm. __ Designed by Bill Bowden

Two Transistor LED Flasher -  This is a classic 2 transistor astable multivibrator.  Many other NPN small signal or switching transistors can be used, including 2N4401, PN2222 or 2N2222 using the circuit on the left.  The circuit can also be inverted using PNP transistors such as 2N3906, 2N4403, PN2907, or 2N2907 as shown to the right __ Designed by Bill's Electronics Reference Library

Two Transistor LED Flasher 1 -  Circuit Only __ Designed by Tony van Roon  VA3AVR

Two Transistor LED Flasher 2 -  This circuit will flash a super-bright LED  (5000+ mcd) .  Good for fake car alarm or other attention getting device.  Component values are not critical, try anything else first from your junkbox.  Obviously, the 470 ohm resistor  (R3) determines the LED's brightness and limits the current flow to about 20mA.390 ohm can also be used as a save value.  If you decide to go with a green or yellow led, which draw more current, you may want to replace the 470 ohm with an appropriate value.  Flash rate is determined by R2 and C1 __ Designed by Tony van Roon  VA3AVR

Two-wire Lamp Flasher -  This circuit was designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert the circuit between existing lamp and negative supply. __ Contact: Flavio Dellepiane, fladello @ tin.it

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

TV_Fake_Camera_Flasher -  After having my doorbell rung several times in the middle of the night by some kids, I decided to install some fake TV cameras around the outside of my house.  I was not satisfied with the LED lights on the cameras.  The heavy current drain of the original circuit meant I would have to replace the battery every few months.  So, I removed the original LED driver and added my own simple flashing circuit.   . . . Hobby Circuit by David Johnson P.E.-August, 2017

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Light Flashers:  #'s - B        C - K        LO        P - S         T - Z

 


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



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