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Light Flasher
Circuits Page 3a
Light Flashers:
#'s A - C
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L
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Last Updated on:
Thursday, November 30, 2017 07:41 AM |
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Circuits Designed by Dave Johnson, P.E. : |
- Fake
Car Alarm Light
Whenever the car’s ignition is turned off, this circuit activates a flashing LED,
which can be positioned to appear as an active alarm system. (added 7/06)
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FLASHING LED ADVERTISING BADGE #1
I have seen numerous flashing light badges at trade shows and conventions.
They are often handed out as gifts to promote some business. The devices often use
inefficient circuits, which cause the battery power source to be quickly depleted.
My circuit is simple but efficient enough to provide months of continuous LED
flashing. It also has a tiny push-button switch to turn on and off the light
flashing, extending battery power.
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FLASHING LED ADVERTISING BADGE #2
This circuit is similar to flashing LED advertising badge #1. It uses a CD4013
dual D Flip/Flop IC. The 74HCT74 IC in Flashing LED Advertising Badge #1 does
not always work. As in #81, a single lithium battery will provide months of
continuous LED flashing. It also has a tiny push-button switch to turn on and
off the light flashing.
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Eight LEDs Random Flasher - 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] |
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Emergency Strobe Flasher Generates 250V - 08/05/99 EDN-Design
Ideas.....Figure 1 shows a complete circuit for an emergency lamp that operates from a
12V automotive battery. The xenon flash tube requires a 250V-dc anode voltage and a
4-kV trigger pulse. To generate the 250V dc, IC1, [Design Idea by Jose Luis Arce,
Tecnosuma Havana, Cuba] |
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Emergency Vehical Flasher - There are several projects on this page.
Please scroll down to find the LED Chaser…. [Jason from Roanoke, Virginia] |
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Expandable 16 Stage LED Sequencer - The circuit below uses a hex Schmitt
Trigger inverter (74HC14) and two 8 bit Serial-In/Parallel-Out shift registers
(74HCT164 or 74HC164) to sequence 16 LEDs. The circuit can be expanded to greater
lengths by cascading additional shift registers and connecting the 8th output (pin 13)
to the data input (pin 1) of the succeeding stage. A Schmitt trigger oscillator
(74HC14 pin 1 and 2) produces the clock signal for the shift registers, the rate being
approximately 1/RC. Two additional Schmitt Trigger stages are used to reset and load
the registers when power is turned on. Timing is not critical,..... [Bill Bowden] |
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Fake Car Alarm Light - Whenever the car’s ignition is turned off, this
circuit activates a flashing LED, which can be positioned to appear as an active alarm
system..... [Designed by David A. Johnson] |
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Fancy LEDS - The idea of this project came from my youngest son. He was
dreaming of a small tool able to write symbols or pictures on a screen. As a graphic
LCD (even bought at Crownhill :) ) was too expensive (or too easy??), the solution
adopted was to pilot a matrix of Leds. This way,.....(project added 07/07/07)
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Fantastic Atom Expander (Aaron Cake) - Here is the schematic, PC board
pattern, and parts placement for a "Fantastic Atom Expander". This circuit
produces an "exploding atom" effect using 98 LEDs. |
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Fine Control SuperBright LED Pulser - Four timing controls, 12V supply.
Suitable for Halloween or Christmas props. ..... |
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Light Flashers: #'s
A - C
D - F
G - K
L
M - R
S T - Z |
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