Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Circuits designed by David Johnson, P.E.
Last Updated on: Saturday, December 23, 2017 03:21 PM

List of Dave's Circuit Designs

The contents & graphics of Discovercircuits.com are copyright protected.
LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB SITE server



More  Flashers and Blinkers  LED (Light Emitting Diodes) Circuits

Super Bright 3v Powered LED Flasher  (April 22, 2009) 
 

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 is powered by any 3v source.  I suggest two AA cells but a single 3v lithium coin type cell will also work.  With fresh AA cells, the light should flash for about two weeks.  The light flash is very intense and is perfect for any attention getting night time application.

The circuit uses a TLV3701, which is a nifty single low voltage, low current voltage comparator from Texas Instruments.  I configured the oscillator circuit to produce the needed pulse signal.  A charge pump circuit and an active current limiting circuit supplies the LED with the needed drive signal, whose voltage can exceed the 3v from the battery.  This method insures that the typical 3.6v required by most white LEDs can be produced.

Click on Drawing Below to view PDF version of Schematic

circuitssuper Bright 3v Powered LED Flasher

 

More  Flashers and Blinkers 
LED (Light Emitting Diodes) Circuits

List of Dave's Circuits
Dave's Circuits with Descriptions
Dave's Circuits by Category



eMail David A. Johnson, P.E. about this circuit


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.