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Light Flasher Circuits
Light Flashers:  #'s - A        B - C        D - E        F - H         I - L        M - R        S - T        U - Z

 

Last Updated: August 23, 2015 05:46 AM


Circuits Designed by Dave Johnson, P.E. :
  • 3v 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.,  04/22/09]

  • 3v Universal LED Flasher -  This low power LED flasher circuit draws about 100ua from any DC power supply ranging from 3 volts to 24 volts. The 1. 0Hz 10ms LED pulsed current is held to a constant 10ma . . . [Hobby Circuit designed by David Johnson P.E.,  07/11/06]

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

2 Transistor 2 LED Flasher -  Schematic only, there is no circuit description. . . .  [Tony van Roon's circuit]

2 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. . . .  [Charles Wenzel (unless otherwise noted)]

2 Transistor LED Flasher -  This 1.5volt LED fasher runs more than a year on a single 'd" cell and alternately flashes 2 LEDs at about a 1 second rate. The circuit employs a 74HC14 CMOS hex inverter that will operate at very low voltages (less than 1 volt). One section is used as a squarewave oscillator (pins 1 and 2) , while the others are wired to produce a short 10mS pulse on alternate edges of the square wave so the LEDs will alternate back and forth. The output sections each use a capacitor charge pump to increase the voltage for the LEDs. . .  [Bill Bowden design this one]

2 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. . . .  [from Bill's Electronics Reference Library]

2 Wire Lamp Flasher -  Ideal to operate3 to24 Volt DC existing on-Circuit lamps LED operation is also possible. . .  [Flavio Dellepiane's web site]

200W Lamp Flasher -  200W Lamp Flasher kit is used to flash lamps, bulbs and halogen lamp to give your product that attracting look. . . .  [by Rajkumar Sharma]

220 Volts Flashing Lamps -  This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. The device formed by Q1, Q2 and related resistors triggers the SCR. Timing is provided by R1, R2 & C1. To change flashing frequency don't modify R1 and R2 values: set C1 value from 100 to 2200΅F instead. . .  [Designer's name not found]

220V Blinking LED -  This is a simple blinking LED circuit powered from 220V that can be used to mark special places or as voltage indicator. The voltage from the mains charges the capacitor through R1 resistor and D1 diode. . . .  [Designer's name not given]

220V Solid State Flashing Lamp with 555 -  This 220V mains operated solid state flashing lamp circuit uses a 555 timer IC to control the ON and OFF times of a triac which controls power to the load. The power supply for the IC is obtained by half wave rectifier (D1), a stabilizer circuit (D2 and R1) and filter capacitor C1. The lamp stays ON for about 1 second and OFF. . .  [Circuit posted by Popescu Marian]

230 Volts Flashing Lamps -  This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. . .  [Flavio Dellepiane's web site]

230V Rotating & Blinking LED -  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. . .  [Flavio Dellepiane's web site]

25 LED Chaser (Sequencer) -  A Fairly Simple C-MOS Circuit. . . .  [G.L. Chemelec, designer]

25 Light Sequencer using Xmas Lamps -  This circuit above can drive 25 small Xmas lights. The lights operate at about 200mA and 3 volts. The supply voltage is set to 5 volts and the 4017 counter output will drop about a volt using the 2N3053 transistors. The voltage on the emitters of the rows transistors will be about 0. 7 volts less than the base so the lamp voltage will be about 3 volts. You can. . .  [Bill Bowden]

250ksps 16-Bit Micropower ADC offers an Excellent Combination of Size Power & Speed -  DN294 Design Notes (Linear Technology). . .  [Linear Technology]

2-wire Lamp Flasher -  This circuit has been designed to provide that continuous light lamps already wired into a circuit, become flashing. Simply insert  circuit between existing lamp and negative supply. Especially suited for car or panel pilot lights, this device can drive lamps up to 10W. . .  [Flavio Dellepiane's web site]

3 Channel Color Organ for a Car -  An Active Filter Design. . . .  [G.L. Chemelec, designer]

3 Volt Low Battery Voltage Flasher -  This circuit is designed to monitor two alkaline cells (3v) that form the battery often used in portable electronic equipment . . . [Circuit by David Johnson P.E.,  01/01/98]

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. . . .  [email Colin Mitchell: talking AT tpg.com.au]

36 LED Chaser -  example of multiplexed display to produce a chaser - LEDs were mounted in a circle. . .  [by P. Townshend - EduTek Ltd]

3rd 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. . .  [Tony van Roon's circuit]

3V LED Chaser -  There are many 9V chaser circuits that seem to waste about 7V when driving LEDs that are only about 2V. This project is unique, because it uses only two inexpensive alkaline battery cells totaling 3V for power. Since most of the waste is eliminated, the cells last a long time. Unlike the other circuits, this one flashes the LEDs for only about 30ms each, further extending the battery life. For user convenience, it has a stepper speed control and a brightness control. At slower speeds and with reduced brightness, . . .  [by IQ Technologies Industry, unless otherwise noted online]

3v 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.,  04/22/09]

3v Universal LED Flasher -  This low power LED flasher circuit draws about 100ua from any DC power supply ranging from 3 volts to 24 volts. The 1. 0Hz 10ms LED pulsed current is held to a constant 10ma . . . [Hobby Circuit designed by David Johnson P.E.,  07/11/06]

4 Channel CAR Color Organ -  FOUR Channels. , All Channels are Active Band Pass Filters. . . .  [G.L. Chemelec, designer]

4 Channel HOME Color Organ -  FOUR Channels. , All Channels are Active Band Pass Filters. . . .  [G.L. Chemelec, designer]

40 LED Bicycle Light 555 Timer 6 Volt -  The 555 circuit below is a flashing bicycle light powered with four C, D or AA cells (6 volts). Two sets of 20 LEDs will alternately flash at approximately 4. 7 cycles per second using RC values shown (4. 7K for R1, 150K for R2 and a 1uF capacitor). Time intervals for the two lamps are about 107 milliseconds (T1, upper LEDs) and 104 milliseconds (T2 lower LEDs) . . .  [Bill Bowden]

555 Christmas Lights -  This 555 flasher project is an exception. This is a take-off on the previous Firefly Lights Circuit posting. I had a strip of four tiny PCBs remaining, so I built them up before. . .  [Circuit posted by Jim Keith]

555 LED Flasher -  This is a small size LED flasher built with the 555 timer IC that is powered from 2 x 1. 5V batteries. The circuit can be used as a flashing metronome, dark room timer, memo-reminder or other similar applications. . . .  [Circuit posted by Popescu Marian]

7 Channel Auto Reverse Sequential Disco Running Lights -  From 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator at a particular frequency generates the clock pulses. The clock pulses are counted by a counter and gives output after every 10 pulses . . .  [by IQ Technologies Industry, unless otherwise noted online]

9v neon flasher -  No Circuit Description, Schematic Only. . .  [CircuitoZ.net, contact Ruddy]

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]

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Light Flasher Circuits
Light Flashers:  #'s - A        B - C        D - E        F - H         I - L        M - R        S - T        U - Z


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