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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.
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)
High Power LED Flasher
Power LEDs are becoming
more popular these days. The DC input power to these devices ranges from 1
watt to 5 watts. Normal LEDs only receive about 0.05 watts. At this higher
power, these devices can emit a lot of light. You can buy them in just
about any color in the rainbow but white seems to be the most popular. One
application for these devices is a flashing light. If the flash duration
and flash rate is kept low, the average current can be low enough that even
a small battery can last quite a while.....
Links to electronic schematics, circuits, designs and/or diagrams for engineers,
hobbyists, students & inventors:
Fading LEDs: 2-strips of LEDs fading in a complementary manner 9 Volt Battery-operated portable unit (added 9/04)
Fading Red Eyes: can be used to slowly illuminate and fade a pair of red LEDs (added 4/02)
Fantastic Atom Expander: "exploding atom" effect using 98 LEDs (electronic circuit added 4/02)
Flashing High Intensity LED 3rd Brake Light: This circuit to make a flashing3rd brake light assembly was designed to be
easy to locate all the needed components and reasonably in expensive to build. (added 4/02)
Flickering Fire Light: LED or Bulb Flicker Shimmer Randomly Like Candle Flame or Fire : This may well be the world's
only discreet logic circuit to generate truely random output. It makes an excellent candle flicker light for your haloween pumpkin, and looks much more authentic than a shimmer light
wherever a good a simulated flame effect is required. I do not gaurantee the accuracy or safety of any information herein.
(added 2/05)
Garage Light Indicator LED: Garage Light Indicator LEDThis is the simplest possible way to power an LED off 115VAC.
I epoxied a high-brightness yellow LED into the switch plate to my garage light. The light switch is inside my house, but the garage light cannot be seen when the door is closed. This has
caused me to leave the garage light on overnight many times until I created this solution. I have outdoor lights that could use this solution as well (when I get around to it). This
circuit was soldered together, wrapped with electrical tape and tucked inside the electrical box containing the garage light switch. A small hole was drilled in the switch plate for the
LED to stick out of. Designed by Andrew R. Morris
(added 09/05)
Halloween Flashing-Eyes Badge: Two-LEDs act as eyes following the rhythm of music or speech. 3V Battery-operated
device suitable for pins or badges. (added 4/08)
Heart of LEDs: One of the requests we received after publication of the Christmas Star was "can you do different
shapes?" Well, with Mother’s Day coming up soon, we thought a heart would be appropriate. Now you can have something different to give to that special Mum or Grandmother. or you may be
able to redeem yourself if you forgot St Valentines Day! Either way, the Heart will certainly last a lot longer than the traditional bunch of flowers!... (added 4/05)
High side Current sensing switched mode regulator provides constant Current LED drive: 04/14/05 EDN
Design Ideas / (added 6/06) Drive LEDs with constant-current source.
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