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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 ...(added 6/07) |
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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....(tony van Roon's schematic / circuit added 10/02) |
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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 2½ minutes. A 4017
counter is used to produce the traffic light sequence and this project could be
adapted.....Designed by John Hewes (circuit added 06/07/08) |
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Traffic Light (Jose Pino) - A two-way traffic light using a CMOS 4017 and 555. To
be used as toy only. (circuit added 04/06) |
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Traffic Light Control Circuit 74145 - This page features a very basic traffic
light circuit that is built around the TTL family 74145 -1 of10 Decoder. The circuit
is designed to drive light emitting diodes that are connected in a common anode
arrangement. (added 4/02) |
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Traffic Light Controller - controls on3 LED traffic light sequence (added 4/02) |
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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, …..(added 07/07/07) |
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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.....(added 10/05) |
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Transistor LED Flasher (Jose Pino) - A simple LED flasher that uses only two
transistors, one capacitor and one resistor. This basic oscillator can have other
simple applications. (6/10/2006) |
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Transistor Organ (Aaron Cake) - 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 (added 04/03/02) |
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Triple Stroboscope - ….(circuit design added 08/08) |
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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…..(added 07/03) |
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Two Transistor LED Flasher - This circuit will flash a bright red LED (500 mcd as
an attention getting device or fake car alarm. Componten Values are not criticl and
transistors may be used. Flash duration is determined by R2….(circuit design added
5/09) |
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Two Transistor LED Flasher #2 - (electronic design added 9/02) |
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Two-wire Lamp Flasher - Ideal to operate 3 to 24V DC existing on-circuit lamps.
LED operation is also possible. (electronic circuit added 06/07/08) |
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Two-wire Lamp Flasher (redcircuits) - This circuit has been designed to provide
that continuous light lamps already wired into a circuit, become flashing. Simply
insert the circuit between existing lamp and negative supply. Especially suited for
car or panel pilot lights, this device can drive lamps up to 10W.... (design added
11/06) |
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Typical Strobe Light Trigger Circuit - 555 based Timing circuit which triggers a
SCR which controls the trigger transformer (added 5/02) |
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Ultra Low Power LED Flasher - The efficiency of some newer LEDs is amazing. Some
of the latest green LEDs can launch blinding light with just one milliamp of current.
I take advantage of one of these newer devices in the circuit below. The flashing
circuit uses a classic multivibrator oscillator, made from a tiny National
Semiconductor’s LMC7215 low power voltage comparator. The circuit produces a short
10ms pulse every two seconds, drawing power from a 3v supply. I suggest using a
surface mounted green LED from Kingbright..... ….(designed by David A. Johnson) |
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Universal Flasher Circuit - LED flasher with the LM3909 IC (Tony van Roon's
design added 2/06) |
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Universal Flasher Using a Latching Relay - This circuit is powered by a 9v battery
and controls any AC to DC load through a set of relay contacts, rated at 10 amps. To
conserve power, the circuit uses a latching relay. A variable frequency oscillator
controls the flashing speed from 0.2Hz to 2Hz. A pair of pulse generators first latch
the contacts closed then unlatches them open. The power consumption is so low that a
9v battery will last for several months. Posted ….(designed by David A. Johnson) |
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Valentine Heart - 18 LEDs flash at three different rates and you can use these to
create an eye-catching Valentine Heart for that special person! A template for the
heart shape can be downloaded. The circuit is kept simple (and low cost) by using the
4060B IC which is a counter and oscillator (clock) in one package.....Designed by John
Hewes (circuit added 06/07/08) |
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White LED Driver Touts High Efficiency - 06/12/03 EDN-Design Ideas: White LEDs,
the most recent addition to the LCD backlight, find common use in providing backlight
for color LCDs. Thanks to their size and white-light output, they appear in small,
portable devices with color displays, such as PDAs and cellular phones. Like other
LEDs, a white LED needs a constant-current source—typically,.....(design idea added
7/03) |
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White LED Stroboscope With Constant Duty Cycle & Constant Current Drive -
Finally, white LED's are bright enough to use in a practical stroboscope. This circuit
can operate as a bench-top stroboscope that, in conjunction with an oscilloscope or
frequency meter and bench top power supply can accurately measure rotational speeds,
or it can be operated hand-held from a single 9V battery, ...(schematic / circuit
added 6/07) |
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Wig/Wag LED Flasher - This simple circuit will flash two LEDs in an alternating
fashion. (added 12/04) ….(designed by David A. Johnson) |
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Xenon Flash & Strobe Page - (electronic diagram added 6/03) |
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Xenon flash valve - An experiment of the xenon flash valve. (added 10/05) |
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Xenon Flasher (Colin Mitchell) - 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….(circuit design added 08/08) |
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Xenon Strobe Light (Aaron Cake) - (circuit / schematic added 5/03) |
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Xenon Strobe Light (Linscott) - The way that this circuit works is as follows. The
AC line voltage is rectified by D1 and D2 which connects to a voltage doubler circuit
made up of the two 22uf capacitors. The Flash Freq. Pot and the 10uf capacitor charge
up which triggers the Diac ….(added 4/02) |
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Xenon Strobe Light (Rod Elliott) - Designed as a companion to the LX800, can also
be used by itself (electronic schematic / circuit added 4/02) |
