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

 

Last Updated: October 13, 2017 03:04 AM

Circuits Designed by Dave Johnson, P.E. :

Reduced Power Sequential LED FlasherThe 74HC4017 is a neat decade counter which has 10 decoded outputs.  When supplied with a low frequency clock and with a LED attached to each of the outputs, an interesting ten step sequential flasher effect can be produced.  The LEDs can be configured in . . . Hobby Circuit designed by Dave Johnson P.E.-November, 2008

Revisited-Model Train Lighthouse FlasherThis was originally designed for a model in a HO train set.  It simulates the behavior of the light from a lighthouse.  The LED intensity gradually increases, then flashes with a bright light and finally decreases slowly in intensity . . . Hobby Circuit designed by David Johnson P.E.-July, 2006


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

Parked-Vehicle Highway Flasher -  Often, at night, a speeding vehicle rams into another vehicle parked at the edge of a highway.  Cars have parking flashers, but trucks, buses and loading rickshaws rarely have any form...__ Electronics Projects for You

PC Parallel Port Output Capabilities -  includes instructions how to connect a relay to PC parallel port __ Designed by Tomi Engdahl

Phone Light Flasher -  This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop.  Here is such a device.  The ring detect part of this circuit came from [url]http://www.  hut.  fi/Misc/Electronics/circuits/telephone_ringer.  html[/url].  Notes: 1.  You may need to use a lower voltage zener for D1 and D2.2.  You can use a regular relay instead of a solid state relay, but the arcing accross the contacts may destroy it pretty quickly.3.  Be very sure that you have not accidentally connected 120V to the phone line when building and installing this __ Designed by Aaron Cake

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

PIC Light Chaser -  The circuit this month is a simple 8 light chaser built around a PIC.  This will demonstrate how easy it is to program a PIC and to utilize it in a circuit.  The circuit works as follows.  When power is supplied to the circuit the PIC resets and starts.   __ Designed by Randy Linscott

PIC16F84 LED Chaser -  There are several projects on this page.  Please scroll down to find the LED Chaser.   __ Designed by Jason KE4NYV from Roanoke, Virginia

Pocket stroboscope -  This circuit is a mini storoscope 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

Police Lights -  These two circuits flash the left LEDs 3 times then the right LEDs 3 times, then repeats.  The only difference is the choice of chips.  __ 555-Timer

Portable Lamp Flasher -  Here is a portable, high-power incandescent electric lamp flasher.  It is basically a dual flasher  (alternating blinker) that can handle two separate 230V AC loads  (bulbs L1 and L2) .  The circuit is...__ Electronics Projects for You

Portable Signal Wand -  Flashing lights have varied applications.  For example, travelers can use these as warning beacons on highways to catch the attention of the public in case of an emergency.  Described here is...__ Electronics Projects for You

Power 220V Flashing LED -  AC mains operated single LED flasher circuit, built using the popular CMOS timer chip TLC555 is shown below.  The whole circuit is powered directly by the grid supply of 230VAC through a capacitive potential divider and associated components.  This minuscule Power LED Flashing circuit can be easily fit inside a very small __ Designed by T.K. Hareendran

Power flasher -  There is no need to resort to complex circuitry if what you are looking for is a simple power flasher.  The light will flash at around 1Hz with a 100W bulb at a duty cycle of 50%.  The max.  load that can be driven with this circuit is 200W and if you wish to have a different frequency

Power Flasher (PAGE 113) -  Suitable for alerting purposes.  Drives 12V Car bulbs __ Contact: Flavio Dellepiane, fladello @ tin.it

Power-line outage flashes red alert -  06/13/02 EDN-Design Ideas This design idea expands on a circuit in a previous one to configure a power-outage detector with a flashing alarm (Figure 1, Reference 1].  The circuit plugs into a mains outlet and uses trickle-charged nickel-cadmium batteries.  The green-LED monitors the presence of line voltage.  The BZV55-C4V3 zener diode, D1 protects the batteries against overvoltage __ Circuit Design by Vasiliy Borodai, Zaporozhje, Ukraine

Programmable LED -  Alex Inspired by various LED Throwies, blinking LEDs and similar instructables I wanted to do my version of an LED controlled by a microcontroller.  The idea is to make the LED blinking sequence reprogrammable.  This reprogramming can be done with __ Designed by Radio LocMan

Programmable LED Flashers -  LED goes to steady state after a preset number of flashes; Two simple, wide supply range operating circuits __ Contact: Flavio Dellepiane, fladello @ tin.it

Pulsing Third Brake Light -  The schematic consists of two 555 timer/oscillators in a dual timer configuration both setup in astable mode.  When power is applied via the brake pedal, the brake light driver Q1 is switched on via the low-output pin 3 of IC2, and timer IC1 begins its timing cycle.  With the output on pin 3 going high, inhibiting IC2's pin 2  (trigger) via D2, charge current begins to move through R3, R4 and C2. __ Designed by Tony van Roon  VA3AVR

Pulsing third Brake lite for cars -  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

Push-bike Light -  Automatic switch-on when it gets dark; 6V or 3V battery operation __ Contact: Flavio Dellepiane, fladello @ tin.it

Quiz -  This project can be used for a quiz with up to 4 contestants  (or teams) .  Each contestant has a trigger push-switch and LED.  When a trigger switch is pressed it lights the corresponding LED, sounds the bleeper and prevents the other trigger switches from workingtherefore showing which contestant was the first to press their switch __ Designed by John Hewes

Random' Flasher for 8 LEDs -  This project uses a 4026 counter and display driver IC to flash eight LEDs in an apparently random manner.  It can be used to create a display of your choice.   __ Designed by John Hewes

Reduced Power Sequential LED Flasher -  The 74HC4017 is a neat decade counter which has 10 decoded outputs.  When supplied with a low frequency clock and with a LED attached to each of the outputs, an interesting ten step sequential flasher effect can be produced.  The LEDs can be configured in . . . Hobby Circuit designed by Dave Johnson P.E.-November, 2008

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

Revisited-Model Train Lighthouse Flasher -  This was originally designed for a model in a HO train set.  It simulates the behavior of the light from a lighthouse.  The LED intensity gradually increases, then flashes with a bright light and finally decreases slowly in intensity . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

Ring-Around LED Flasher -  This schematic diagram shows a ring-around LED flasher circuit.  This circuit will turn off two LEDs and turn on the other two until the timing cycle reverses.  This circuit can be configured to flash four LEDs in sequential order  by pressing and holding S1 closed until only one of the LEDs is on then releasing it.

Ringing Phone Light Flasher -  This is very useful in a situation were there is lots of noise and it is impossable to hear the phone, such as a workshop.  Here is such a device.  The ring detect part of this circuit came from [url]http://www.  hut.  fi/Misc/Electronics/circuits/telephone_ringer.  html[/url].  Notes: 1.  You may need to use a lower voltage zener for D1 and D2.2.  You can use a regular relay instead of a solid state relay, but the arcing accross the contacts may destroy it pretty quickly.3.  Be very sure that you have not accidentally connected 120V to the phone line when building and installing this __ Designed by Aaron Cake

Rotating & Flashing 230V Lights -  This design can be of some interest for those wanting striking light signs, as it can drive up to three 230V lamp strings in three operating modes.  The 15V dc supply is obtained from a nominal 230/24V center tapped ac transformer    (T1) and a full wave rectifier __ Contact: Flavio Dellepiane, fladello @ tin.it

Running LED -  Just for fun I designed and tested two running LED circuits based on CD4017.  The first one drives a strip of six LED, while the second one works for a strip of eight LED.  Both circuits work in bidirectional running __ Designed by Andrea-Central Italy

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

 


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